Preface, Contents
User Information
Product Overview 1
Assembly
Installing and Preparing the C7 2
Configuring MPI Networks and
PROFIBUS-DP Networks 3
Connecting a Programming
Device to a C7 4
Inputs / Outputs
C7 Digital Input/Output 5
C7 Analog Input/Output 6
Universal Inputs 7
Maintenance 8
Appendices
General Technical Specifications A
Guidelines for Handling
Electrostatically Sensitive
Devices (ESD) B
Glossary, Index
C79000-G7076-C626-01
C7-626 / C7-626 DP
Control Systems
Volume 1
Installation, Assembly, Wiring
Manual
SIMATIC
ii
C7-626 / C7-626 DP Control Systems
C79000 G7076 C626 01
This manual contains notices which you should observe to ensure your own personal safety, as well as to
protect the product and connected equipment. These notices are highlighted in the manual by a warning
triangle and are marked as follows according to the level of danger:
!Danger
indicates that death, severe personal injury or substantial property damage will result if proper precautions are
not taken.
!Warning
indicates that death, severe personal injury or substantial property damage can result if proper precautions are
not taken.
!Caution
indicates that minor personal injury or property damage can result if proper precautions are not taken.
Note
draws your attention to particularly important information on the product, handling the product, or to a particular
part of the documentation.
The device/system may only be set up and operated in conjunction with this manual.
Only qualified personnel should be allowed to install and work on this equipment. Qualified persons are
defined as persons who are authorized to commission, to ground, and to tag circuits, equipment, and sys-
tems in accordance with established safety practices and standards.
Note the following:
!Warning
This device and its components may only be used for the applications described in the catalog or the technical
description, and only in connection with devices or components from other manufacturers which have been
approved or recommended by Siemens.
This product can only function correctly and safely if it is transported, stored, set up, and installed correctly, and
operated and maintained as recommended.
SIMATICR and SINECR are registered trademarks of SIEMENS AG.
Third parties using for their own purposes any other names in this document which refer to
trademarks might infringe upon the rights of the trademark owners.
We have checked the contents of this manual for agreement with the
hardware and software described. Since deviations cannot be precluded
entirely, we cannot guarantee full agreement. However, the data in this
manual are reviewed regularly and any necessary corrections included in
subsequent editions. Suggestions for improvement are welcomed.
E Siemens AG 1996
Technical data subject to change.
Disclaimer of LiabilityCopyright E Siemens AG 1996 All rights reserved
The reproduction, transmission or use of this document or its contents is
not permitted without express written authority. Offenders will be liable for
damages. All rights, including rights created by patent grant or registration
of a utility model or design, are reserved.
Siemens AG
Automation Group
Industrial Automation Systems
Postfach 4848, D-90327 Nürnberg
Siemens Aktiengesellschaft Order No. C79000-G7076-C626
Safety Guidelines
Qualified Personnel
Correct Usage
Trademarks
iii
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Preface
The information in this manual will enable you to do the following:
SInstall and wire a C7-626 or C7-626 DP (Volume 1).
SAssign parameters to the CPU of the C7-626 or C7-626 DP, load a user
program into this CPU and run the program (Volume 2).
SPut the C7-626 and C7-626 DP into operation and use the operator
interface (O/I) functions (Volume 2).
The manual is divided to take into account two different types of reader:
SVolume 1:
Users who carry out the mechanical and electrical installation of the C7 at
the location of use and who bring the C7 to a state of readiness for
immediate use.
SVolume 2:
Users who create control programs and O/I configurations, load them into
the C7, and print out screen displays and messages.
This manual describes the hardware and software of the C7-626 and C7-626
DP. It consists of two volumes.
Volume 1 of the manual covers the following topics:
SInstallation and preparation of the C7-626 or C7-626 DP
SNetworking the C7-626 or C7-626 DP with programming devices (PGs)
and other devices
SConnecting the digital and analog I/Os
SConnecting the I/Os to the universal inputs
SConnecting the IM361 interface module
SConnecting a printer to the C7
Purpose
Audience
Contents of This
Manual
iv C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Volume 2 of the manual covers the following topics:
SStarting up the C7
SControlling with the C7 CPU
SAddressing and assigning parameters to the C7 I/O
SC7 diagnostics
SUsing the O/I functions of the C7
To make the manual easier to read, the device type description C7-626 or
C7-626 DP will be referred to throughout the manual as C7.
This manual is valid for the following C7s:
C7 Order Number
C7-626 6ES7626-1AG00-0AE3
C7-626 DP 6ES7626-2AG00-0AE3
This manual is available under order number 6ES7626-1AE00-8BA0.
This manual describes the C7-626 and C7-626 DP. For programming,
expanding and configuring a C7, you also require the following manuals:
Conventions
Concerning C7
Scope of This
Manual
C7 Manual
Other Pertinent
Manuals
Preface
v
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
C7
Programming
Assigning parameters ConfiguringExpanding
ProTool
Hardware and Installation
If required
Statement List for
S7-300 and S7-400
Ladder Logic for
S7-300 and S7-400
System and Standard
Functions
STEP 7 User Manual
Program Design
Module Specifications
Preface
vi C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Table 1-1 STEP 7 Documentation Package
Manual Contents
Standard Software for S7
and M7
STEP 7 User Manual
Provides information on working with the STEP 7 tools
SInstalling and starting up STEP 7 on a programming device/PC
SHandling tools with the following contents:
– Managing projects and files
– Configuring and assigning parameters to the S7-300
– Assigning symbolic names for the user program
– Creating and testing the user program in STL/LAD
– Creating data blocks
– Configuring communications between several CPUs
– Loading, storing and deleting the user program in the programming
device/CPU
– Monitoring and controlling the user program (for example, variables)
– Monitoring and controlling the CPU (for example, operating mode, memory
reset, memory compression, protection levels)
Statement List for
S7-300/S7-400
Programming Manual
or
Ladder Logic for
S7-300/S7-400
Programming Manual
Reference manual for programming with STL or LAD:
SBasics for working with STL/LAD (for example, structure of STL/LAD, number
formats, syntax)
SDescription of all operations in STEP 7 (with programming examples)
SDescription of the different addressing possibilities in STEP 7 (with examples)
SDescription of all integral functions of the CPUs
SDescription of the CPU-internal registers
System Software for
S7-300/S7-400 System and
Standard Functions
Reference Manual
Detailed description of
Sall standard functions (FCs) integrated into STEP 7
Sall system functions (SFCs) integrated into the operating system of a CPU
Standard Software for S7
Converting S5 Programs
Manual
Provides information on converting STEP 5 programs to STEP 7:
SWorking with the S5/S7 Converter
SRules for conversion
SUsing converted STEP 5 standard function blocks in STEP 7
Master Index SMaster index for all the manuals in the documentation package.
Preface
vii
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
You will find a list of further information sources on the subject of the
S7-300 and other programmable controllers in Appendix D of Volume 2 of
this manual.
Table 1-2 Additional Manuals
Manual Contents
System Software for S7-300
and S7-400 Program Design
Programming Manual
Provides basic information on designing STEP 7 programs:
SInstructions for the efficient solution of programming tasks with the
programming device/PC and STEP 7
SHow the CPUs operate (for example, memory concept, I/O access, addressing,
blocks, data types, data management)
SDescription of STEP 7 data management
SUsing STEP 7 data types
SUsing linear and structured programming (with programming examples)
SUsing block call operations
SOverview of how to use the STEP 7 applications for developing projects (with
detailed examples)
SUsing the test and diagnostic functions of the CPUs in the user program (for
example, error OBs, status word)
S7-300 Programmable
Controller
Installation and Hardware
Describes the hardware of the S7-300:
SElectrical configuration of the S7-300
SInstalling the S7-300
SWiring and preparing the S7-300 for operation
SCharacteristics and technical specifications of the S7-300 modules
S7-300/M7-300
Programmable Controllers
Module Specifications
Reference Manual
Describes the hardware of the S7-300 modules:
SAnalog modules
SDigital modules
SInterface modules
SCharacteristics and technical specifications of the S7-300 modules
S7-300 Programmable
Controller CPU 312 / CPU
314/ CPU 315 / CPU 315
DP, Instruction List
Describes the instruction set of the CPU 312, CPU 314, CPU 315 and CPU 315 DP,
including the execution times of all operations.
PG 7xx Describes the programming device (PG) hardware:
SAssembling and starting up the programming device
SExpansion possibilities
SConfiguring
SError diagnostics
COROS
ProTool
Manual for creating configurations:
SUsing ProTool
SConfiguring
SDisplays and messages
SLoading the configuration into the C7
Other References
Preface
viii C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
This manual has the following aids to help you find specific information:
SAt the beginning of the two volumes, you will find a complete directory
of contents.
SIn each chapter, you will find information in the left-hand column of
every page giving you an overview of the contents of that section.
SAfter the Appendices, there is a Glossary containing important technical
terms used in the manual.
SAt the end of the manual, there is a detailed index.
The C7 control system conforms to standards as described in Appendix A.1.
If you have any questions concerning the C7 control system, please contact
your local Siemens representative.
You will find a list of Siemens representatives worldwide in Volume 2 of the
manual, Appendix E.
If you have any questions or remarks concerning the manual, please fill in
and return the Suggestions/Corrections form at the back of Volume 2.
Structure of This
Manual
Standards
Queries
Preface
ix
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Contents
1 Product Overview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Installing and Preparing the C7 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Scope of Supply and C7 Accessories 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Inserting the Labeling Strips 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Installing a C7 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Arranging the C7 in the Mechanical Environment 2-9. . . . . . . . . . . . . . . . . . . . .
2.5 Electrical Installation and Connector Pin Assignment 2-10. . . . . . . . . . . . . . . . .
2.6 Setup Guidelines for Interference-Proof Installation 2-16. . . . . . . . . . . . . . . . . . .
2.7 Connecting Shielded Cables 2-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.8 Keying Connectors 2-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.9 Arrangement of Additional S7-300 Modules 2-20. . . . . . . . . . . . . . . . . . . . . . . . .
2.10 C7 Clocks 2-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.11 Starting Up 2-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.11.1 With a Loaded Configuration in the C7 OP 2-25. . . . . . . . . . . . . . . . . . . . . . . . . .
2.11.2 Without a Loaded Configuration in the C7 OP 2-26. . . . . . . . . . . . . . . . . . . . . . . .
2.12 Status and Error LEDs on the C7 2-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Configuring MPI Networks and PROFIBUS-DP Networks 3-1. . . . . . . . . . . . . . . . . . .
3.1 Setting Up a Network 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Rules for Configuring a Network 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Cable Lengths 3-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Network Components 3-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5 Bus Connectors 3-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5.1 PROFIBUS Bus Connector 3-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5.2 Bus Connector 6ES7 972-0B.20-0XA0 3-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5.3 Bus Connector 6ES7 972-0B.10-0XA0 3-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5.4 Plugging the Bus Connector into the Module 3-24. . . . . . . . . . . . . . . . . . . . . . . . .
3.6 Starting Up the PROFIBUS DP 3-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Connecting a Programming Device/PC to a C7 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 Connecting a Programming Device/PC to a C7 4-2. . . . . . . . . . . . . . . . . . . . . .
4.2 Connecting a Programming Device/PC to Several Nodes 4-3. . . . . . . . . . . . .
xC7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
5 C7 Digital Input/Output 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Digital Input Function 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 Digital Output Function 5-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3 Status Bits of the DI/DO 5-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 C7 Analog Input/Output 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1 Connecting Transducers to Analog Inputs 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1.1 Connecting Voltage and Current Transducers 6-5. . . . . . . . . . . . . . . . . . . . . . . .
6.2 Connecting Loads/Actuators to the Analog Output 6-6. . . . . . . . . . . . . . . . . . . .
6.3 Analog Input Function 6-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3.1 Characteristics and Technical Specifications of the Analog Input Module 6-10
6.4 Analog Output Function 6-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 Universal Inputs 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8 Maintenance 8-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.1 Changing and Disposing of the Back-Up Battery 8-2. . . . . . . . . . . . . . . . . . . . .
8.2 Replacing the C7 8-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A General Technical Specifications A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.1 Technical Specifications A-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.2 Notes on the CE Marking A-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.3 Notes for the Machine Manufacturer A-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.4 Transport and Storage Conditions for Back-Up Batteries A-7. . . . . . . . . . . . . .
B Guidelines for Handling Electrostatically Sensitive Devices (ESD) B-1. . . . . . . . . .
B.1 What is ESD? B-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B.2 Electrostatic Charging of Objects and Persons B-3. . . . . . . . . . . . . . . . . . . . . . .
B.3 General Protective Measures Against Electrostatic Discharge Damage B-4.
B.4 Taking Measurements and Working on ESD Modules B-6. . . . . . . . . . . . . . . . .
B.5 Packing Electrostatically Sensitive Devices B-6. . . . . . . . . . . . . . . . . . . . . . . . . .
Glossary Glossary-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Index Index-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents
1-1
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Product Overview
This chapter contains general information concerning the C7-626 and
C7-626 DP. A brief overview of the performance range provides you with a
first impression of the two units.
This chapter also tells you which additional components you can connect to a
C7 device.
To operate the C7, you require the following accessories:
SProgramming device (PG) or PC with a multipoint interface and
programming device cable.
SYou must load the following on to the programming device or PC
– the STEP 7 applications
– ProTool.
Overview
Accessories for
Operating the C7
1
1
1-2 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
The C7 systems are available in two variants:
With a graphics display, digital and analog inputs and outputs, multipoint
interface and IM360 interface module.
The C7-626 DP is identical to the C7-626, but has the additional feature of a
PROFIBUS-DP interface module.
Figure 1-1 C7-626 or C7-626 DP
Introduction
C7-626
C7-626 DP
Product Overview
1
1-3
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
With the C7 devices you can:
SLoad and run user programs on the C7 CPU.
SConnect the C7-626 DP to the PROFIBUS DP via an integrated DP
interface.
SProcess digital and analog signals using the integrated I/Os of the C7.
SUse interrupt inputs and counters (for frequency measurement, period
duration measurement, etc.).
SLoad and use O/I applications that you have created using the “ProTool”
configuring tool.
SUse these configurations to monitor and intervene in the process you are
controlling with the user program.
SOutput data to a printer.
The C7 has two units that work independently of each other and can
communicate with each other via the internally-looped C7 multipoint
interface (MPI).
SC7 CPU
SC7 OP
These components will be referred to explicitly in the manuals as required.
In addition to the connections to the process, you can also connect different
components to the C7. The most important components and their functions
are listed in Table 1-1:
Table 1-1 Connectable Components of a C7
Components Function Illustration
Interface module (IM361) ...connects a C7 with an
expansion rack for S7-300
modules
Signal modules (SMs)
(digital input modules,
digital output modules,
analog input modules,
analog output modules,
analog input/output modules)
...pass different process signal
levels on to the C7 CPU. They
can be connected to the C7 via
an IM361.
Performance
Range
C7 Units
Connectable
Components
of a C7
Product Overview
1
1-4 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Table 1-1 Connectable Components of a C7
Components IllustrationFunction
Function modules (FMs) ...for time-critical and
memory-intensive process
signal handling tasks, for
example, positioning or
closed-loop control.
Communications processors
(CP) ...offloads the CPU of
communications tasks, for
example, CP 342-5 DP for
linking to SINEC L2-DP.
S7-300 (CPU) ...communicates via the MPI
with the C7 and/or other nodes
on an MPI network.
S7-400 (CPU) ...communicates via the MPI
with the C7 and/or other nodes
on an MPI network.
Operator Panels (OP) ...executes operator interface
functions and communicates
with the C7 via the multipoint
interface.
PROFIBUS bus cable with bus
connector ...connects nodes on an MPI
network or L2-DP network with
each other.
Programming device cable ...connects a programming
device/PC with a C7.
Printer ...prints out O/I messages of the
C7.
Product Overview
1
1-5
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Table 1-1 Connectable Components of a C7
Components IllustrationFunction
Programming device (PG) or PC
with the STEP 7 and ProTool
software packages
...configures, assigns
parameters, programs and tests
the C7
RS 485 repeater ...for amplifying the signals in
an MPI network or L2-DP
network, and for linking
segments of an MPI or L2-DP
network.
Figure 1-2 shows some possible connections to other devices and the
connection of signal inputs.
IM361
C7
S7-300
modules
S7-300
PG
Printer
Digital inputs/outputs
Universal inputs
Analog inputs/outputs
OP 25
➀
➂
➁
➃
➄
➀
➁
➂
➃
➄PROFIBUS-DP connection
Multipoint interface (MPI)
Figure 1-2 Some C7 Connection Possibilities
Example
Product Overview
1
1-6 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Product Overview
2-1
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Installing and Preparing the C7
In Section You Will Find On Page
2.1 Scope of Supply and C7 Accessories 2-2
2.2 Inserting the Labeling Strips 2-4
2.3 Installing a C7 2-6
2.4 Arranging the C7 in the Mechanical
Environment 2-9
2.5 Electrical Installation and Connector Pin
Assignment 2-10
2.6 Setup Guidelines for Interference-Proof
Installation 2-16
2.7 Connecting Shielded Cables 2-18
2.8 Keying Connectors 2-19
2.9 Arrangement of Additional S7-300 Modules 2-20
2.10 C7 Clocks 2-22
2.11 Starting Up 2-24
2.11.1 With a Loaded configuration in the C7 OP 2-25
2.11.2 Without a Loaded Configuration in the C7 OP 2-26
2.12 Status and Error LEDs on the C7 2-28
Summary of
Sections
2
2
2-2 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
2.1 Scope of Supply and C7 Accessories
The following components are included in the scope of supply of the C7-626
or C7-626 DP:
SC7-626 or C7-626 DP
SA set of labeling strips (for function keys and softkeys)
SBattery
SA grounding bar
S6 shielding clips
S1 seal and 4 brackets
SProduct Information
The following components can be ordered as spare parts for the C7:
SLabeling strips for function keys and softkeys 6ES7 623-1AE00-1AA0
SService package (seal and 4 brackets) 6ES7 623-1AE00-3AA0
SBack-up battery 6ES7 623-1AE00-5AA0
The following components can be ordered as C7-specific accessories:
SC7-626/C7-626 DP Control Systems manual comprising two volumes in
the languages:
German: 6ES7 626-1AE00-8AA0
English: 6ES7 626-1AE00-8BA0
French: 6ES7 626-1AE00-8CA0
Spanish: 6ES7 626-1AE00-8DA0
Italian: 6ES7 626-1AE00-8EA0
SPlug connectors for C7 I/O with coding keys and coding sliders
6ES7 623-1AE00-4AA0.
The following components can be ordered as important standard accessories
for the C7:
SProgramming device cable 6ES7 901-0BF00-0AA0 (for connecting the
C7 to the programming device)
SPC/MPI cable, 5 m 6ES7 901-2BF00-0AA0
SIM cable (for connecting additional modules)
IM cable, 1 m 6ES7 368-3BB00-0AA0
IM cable, 2.5 m 6ES7 368-3BC51-0AA0
IM cable, 5 m 6ES7 368-3BF00-0AA0
IM cable, 10 m 6ES7 368-3CB00-0AA0
Parts Supplied
Spare Parts
Accessories
Installing and Preparing the C7
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SPrinter cable (for V.24 serial interface) 6XV 1440-2C... (max. 16 m)
SSerial cable (PG-C7) 6XV 1440-2K...
The following applies for the length key of both cables:
6XV1440-2Cjjj
Multiplier 0.01 m
0.1 m
1.0 m
10.0 m
100.0 m
E
H
N
T
U
1
1
1
1
2
2
3
4
5
6
6
8
Length digit 10
12
15
16
20
25
32
40
50
60
63
80
0
2
5
6
0
5
2
0
0
0
3
0
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2.2 Inserting the Labeling Strips
The function keys and softkeys are labeled using labeling strips which are
inserted into the keypad from the side.
When shipped, the function keys of the C7 are labeled with K1....K10 and
the softkeys with F1....F14.
A set of blank labeling strips is enclosed with the C7. They can be used for
plant-specific labeling of the C7.
!Caution
The writing on the strips must be wipe-resistant before inserting. A keypad
membrane soiled on the inside cannot be cleaned and can only be replaced
in the factory.
A sheet with plant-specific labeling strips is also provided. The strips must be
cut off exactly along the marked line. If the labeling strips are too large, they
cannot be inserted into the keyboard.
Labeling strips can only be changed when the C7 is not installed. The sealing
ring should be replaced. Proceed as follows:
Step Action
1. Cut off the corners of the labeling strip that are marked with a ➀
C7–626 K1...K10
➀
2. If possible, hold the labeling strip at the end you want to insert in the slit.
Hold the strip horizontally. Hold the strip by touching both surface areas
rather than the edges to facilitate insertion.
3. Slide the strips into the slits provided. The location of the slits is shown in
Figure 2-1. The strips are slid over the existing labeling.
4. To avoid bending the strip as you insert it, move it backwards and forwards
several times .
Labeling Strips
Plant Specific
Labeling
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Labeling Strips
Labeling Strips
Figure 2-1 Inserting Labeling Strips
Installing and Preparing the C7
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2.3 Installing a C7
The C7 has been prepared for fixed installation in a control panel or cabinet
door. Proceed as follows:
Step Action
1. Make a standard cutout in the control panel in accordance with DIN 43700
(dimensions 23.5 x 158.5 mm).
2. Insert the enclosed sealing ring behind the front panel (see Figure 2-2).
3. Insert the C7 in the cutout in the control panel.
4. Insert the four fixing brackets (see Figure 2-4 ➀) into the guides provided.
Push the fixing brackets in until the spring engages.
5. Screw the four fixing screws enclosed with the C7 into the four fixing
brackets enclosed (see Figure 2-5) (approximately two to three turns).
6. Tighten the four screws with a screwdriver.
Insert sealing ring here
Figure 2-2 Inserting the Sealing Ring
168
24069
230.5+0.5
158.5+0.5
Cutout in front panel
Figure 2-3 Dimensions for the C7
Installation
Installing and Preparing the C7
2
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➀
Figure 2-4 Fixing Bracket Before Engaging
Figure 2-5 Fixing Bracket Engaged, with Screw
Fixing Bracket
Before Engaging
Fixing Bracket
Engaged
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Proceed as follows when loosening the fixing bracket:
Step Action
1. Loosen screw.
2. Lift fixing bracket (➀ in Figure 2-6 ).
3. Push fixing bracket out of guide (➁ in Figure 2-6 ).
➁
➀
Figure 2-6 Loosening the Fixing Bracket
Loosening the
Fixing Bracket
Installing and Preparing the C7
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2.4 Arranging the C7 in the Mechanical Environment
When installing a C7, please note the following:
SThe control panel may be 1 to 4 mm thick. Make sure the sealing ring fits
tightly in all places.
SA gap of 50 to 70 mm from a housing wall must be observed on the sides
of the C7 as shown in Figure 2-7.
SThe sealing ring on the frontplate must sit perfectly.
SThe tabs of the insertion strips must not be caught.
SThe C7 must be protected from direct sunlight.
50
50
70 70
Figure 2-7 Gap Dimensions to be Observed when Installing the C7
Arranging the C7
Installing and Preparing the C7
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2.5 Electrical Installation and Connector Pin Assignment
The plug and socket connectors (interfaces) required for connecting the
various inputs and outputs of the C7 are provided.
AUX digital inputs
IM
port
V.24
serial interface
(e.g. for printer)
Analog inputs/
Analog outputs
Digital inputs (top)
DI/DO 24 VDC power supply
Digital outputs (bottom)
Top
Bottom
Left
Right
Figure 2-8 A View of the C7 with External I/O Interfaces
Tables 2-1 to 2-6 show the pin assignments for the following C7 connectors.
Table 2-1 Pin Assignments of the Digital Inputs
Pin No. Signal Explanation
0.0 I0.0 Digital input 0
0.1 I0.1 Digital input 1
0.2 I0.2 Digital input 2
0.3 I0.3 Digital input 3
0.4 I0.4 Digital input 4
0.5 I0.5 Digital input 5
0.6 I0.6 Digital input 6
0.7 I0.7 Digital input 7
1.0 I1.0 Digital input 8
1.1 I1.1 Digital input 9
Introduction
C7 Pin
Assignments
Digital Inputs
Installing and Preparing the C7
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Table 2-1 Pin Assignments of the Digital Inputs
Pin No. ExplanationSignal
1.2 I1.2 Digital input 10
1.3 I1.3 Digital input 11
1.4 I1.4 Digital input 12
1.5 I1.5 Digital input 13
1.6 I1.6 Digital input 14
1.7 I1.7 Digital input 15
Table 2-2 Pin Assignments of the Digital Outputs
Pin No. Signal Explanation
0.0 Q0.0 Digital output 0
0.1 Q0.1 Digital output 1
0.2 Q0.2 Digital output 2
0.3 Q0.3 Digital output 3
0.4 Q0.4 Digital output 4
0.5 Q0.5 Digital output 5
0.6 Q0.6 Digital output 6
0.7 Q0.7 Digital output 7
1.0 Q1.0 Digital output 8
1.1 Q1.1 Digital output 9
1.2 Q1.2 Digital output 10
1.3 Q1.3 Digital output 11
1.4 Q1.4 Digital output 12
1.5 Q1.5 Digital output 13
1.6 Q1.6 Digital output 14
1.7 Q1.7 Digital output 15
Digital Outputs
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Table 2-3 Pin Assignments of the Analog Inputs/Outputs
Pin No. Explanation
AI1-U Analog input 1, signal input for voltage
AI1-I Analog input 1, signal input for current
AI1-M Analog input 1, reference potential
AI2-U Analog input 2, signal input for voltage
AI2-I Analog input 2, signal input for current
AI2-M Analog input 2, reference potential
AI3-U Analog input 3, signal input for voltage
AI3-I Analog input 3, signal input for current
AI3-M Analog input 3, reference potential
AI4-U Analog input 4, signal input for voltage
AI4-I Analog input 4, signal input for current
AI4-M Analog input 4, reference potential
MANA Reference potential of analog measuring circuit
AO-U Analog output, signal output for voltage
AO-I Analog output, signal output for current
AO-M Analog output, reference potential
Table 2-4 Pin Assignments of the Universal Inputs
Pin No. Explanation
MRelevant ground
DI-X1 Universal input 1 (digital input, interrupt input or counter input)
DI-X2 Universal input 2 (digital input, interrupt input or counter input)
DI-X3 Universal input 3 (digital input, interrupt frequency or period duration
counter input)
DI-X4 Universal input 4 (interrupt input or digital input)
–Not connected
– Not connected
– Not connected
Analog Inputs/
Outputs
AUX Digital Inputs
(Universal Inputs)
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Table 2-5 Pin Assignments of the DI/DO Power Supply
Pin No. Explanation
1L+ 24-volt supply for DI 0.0...1.7
1M Relevant ground for DI 0.0...1.7
2L+ 24-volt supply for DO 0.0...DQ0.7 (approx. 2 A)
2L+ 24-volt supply for DO 0.0...DQ0.7 (approx. 2 A)
2M Relevant ground for DO 0.0...DQ0.7
3L+ 24-volt supply for DO 1.0...DQ1.7 (approx. 2 A)
3L+ 24-volt supply for DO 1.0...DQ1.7 (approx. 2 A)
3M Relevant ground for DO 1.0...DQ1.7
Table 2-6 Pin Assignments for the V.24 Serial Interface (for printer, etc.)
Pin No. Explanation
1C7-M (reference potential)
2 --
3 RxD
4 TxD
5 CTS
6 --
7 --
8 C7-M (reference potential)
9 --
10 RTS
11 --
12 C7-M (reference potential)
13 --
14 --
15 C7-M (reference potential)
DI/DO 24 VDC
Power Supply
V.24 Serial
Interface
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Multipoint interface (MPI)
24 VDC input
(Autor)
Functional earth
DP
Figure 2-9 C7-626 DP: View with MPI, DP and C7 Power Supply
MPI / PROFIBUS DP Interface 24 VDC input (C7 power supply)
Pin No. Explanation
1 NC
2 M24V
3RS485 line B
4 RTSAS
5 M5V
6 P5V
7 P24V
8 RS485 line A
9 NC
Pin No. Explanation
1 L+
2M (ground M24V)
3A+ (authorization input)
4AE (authorization input) ground
Connect the functional earth terminal (see Figure 2-9) to the cabinet
ground taking the shortest route and using a cable lug and a cable with a
minimum cross-section of 4 mm.
Functional Earth
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You can use the following cables for connecting the C7 to other devices:
Table 2-7 Cables for Connecting to the C7
Connecting Cable Length Special Features Illustration Connection
Between ...
MPI
Programming device cable 5 m – C7 ´ PG/PC
C7 ´ OP
C7 ´ S7-300
C7 ´ S7-400
PROFIBUS bus cable
interior cable
direct-buried cable
and bus connectors
without PG-type connector,
with PG-type connector
and PROFIBUS bus terminal RS 485,
with 1.5 m cable, with 3 m cable,
with PG-type connector and 1.5 m
cable
–User must make
own cable C7 ´ PG/PC
C7 ´ OP
C7 ´ C7
C7 ´ S7-300
C7 ´ S7-400
V.24 serial interface
Serial interface (printer cable)
For Siemens printers
DR210/211/2303/231-N
See Catalog
ST80.1 C7 ³ Printer
C7 ´ PG/PC
IM361
IM361 cable – C7 ´ additional
I/O (S7-300)
C7 I/O connections
Connectors for C7 I/O 16 pin
8 pin
4 pin
C7 ´ external
sensors
C7 Device
Connections
Installing and Preparing the C7
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2.6 Setup Guidelines for Interference-Proof Installation
An automation system must be shielded to prevent interference.
When a system is poorly grounded or not shielded, low-frequency and
high-frequency interference signals can penetrate the internal bus of the PLC
and cause malfunctions.
Interference signals can also be caused when relays or contactors switch
(very rapid changes in current or voltage; high-frequency interference
signals) or when two parts of a system have different grounding potentials
(low-frequency signals).
Use only shielded cables for all data lines, analog signal lines, and
connections to universal inputs.
SGround cable shields on both sides.
The standard cables specified in the ST80.1 and ST70 catalogs meet these
requirements.
SScrew down or lock all plug connections.
SDo not install data lines or signal lines parallel to power lines. Use a
separate cable duct located at least 50 cm from power lines.
The basis of trouble-free operation is the hardware setup of the control
system. Any interference signals resulting from the process should be kept
away from the hardware setup where possible.
Devices which could bring in interference signals from outside should be
installed at the bottom of the cabinet. Place the grounding rail directly at the
cabinet entrance so that cables which could be carrying interference signals
can be placed directly on the grounding potential. Place all shielded lines
with their shielding here. With double-shielded signal lines, place only the
outer shield on the grounding potential.
Install long signal lines along the cabinet walls. Setting up the cabinet in
accordance with EMC guidelines is an important factor in the reduction of
interference. All grounding connections in the cabinet must have large cable
cross-sections and be laid over a large surface.
Insulate analog devices in the switching cabinet and ground them to a single
point in the cabinet using copper tape.
Always use equivalent metals for the materials. Never use aluminum (danger
of oxidation).
Connect all doors and metal parts (sides, back and cover) of the cabinet at
least three times to the cabinet frame (short, paint-free, large-area
connections).
Introduction
Use and
Installation of
Interference-Proof
Cables
Interference-Proof
Hardware Setup
Cabinet Setup
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Note
If your system generates high electrostatic voltages (for example, textile
machines and special construction machines), run the grounding lines of the
machine parts carrying interference signals to a separate operating ground
isolated from the central grounding point of the cabinet (surface grounding
with housing construction, reinforcement).
To protect your device from overvoltage and lightning, please observe the
guidelines in /70/ Section 4.11.
For routing wires within buildings, please observe the guidelines in /70/
Section 4.8.
Protection Against
Overvoltage
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2.7 Connecting Shielded Cables
This section describes how to connect the shield of shielded signal lines to
ground. The ground connection is made by directly connecting the shield
with the ground terminal of the C7.
Proceed as follows to install the grounding bar and shielding clips supplied
with the C7:
1. Unfasten the two screws on the C7 as shown in Figure 2-10.
2. Position the grounding bar as shown in Figure 2-10 and fix this in place
with the previously removed screw.
3. Affix the shielding clips to the grounding bar as shown in Figure 2-10.
4. Press the insulated cable into these shielding clips in such a way as to
achieve optimal contact of the cable shield.
Shielding clip
Figure 2-10 C7 with Grounding Bar and Shielding Clips
Overview
Procedure
Installing and Preparing the C7
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2.8 Keying Connectors
A set of connectors with solid and profiled coding keys can be ordered as C7
accessories (see Section 2.1 under Accessories). This section describes how
to key the connectors.
The solid coding keys ➀ and profiled coding keys ➁ (see Figure 2-11)
prevent a connector from being confused with another without polarity
reversal.
Proceed as follows:
1. Insert the solid coding key ➀ into the notches provided on the connector
part ❶.
2. Insert the profiled coding key ➁ into the respective cutouts on the housing
part ❷.
Solid and profiled coding keys that face each other prevent the connector
from being plugged in.
The connector can be plugged in if solid and profiled coding keys do not face
each other.
12345678910
➀
❶
❷
➁
Figure 2-11 How to Key Connectors
!Warning
If you confuse the connectors, the device may be destroyed.
Overview
Keying
Connectors
Installing and Preparing the C7
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2.9 Arrangement of Additional S7-300 Modules
You can connect further S7-300 modules to the C7 via the IM 360 interface
of the C7.
The manual /70/ describes how to install S7-300 modules.
An IM 361 module of the S7-300 system must be connected to the C7.
You can connect an additional I/O as follows:
1. Install the additional I/O as described for racks 1 to 3 in the manual /70/.
2. Connect the C7 to the IM 361 via the IM standard cable (see also
Figure 2-8 for connecting the C7).
When the C7 is first started up, it detects any additional connected modules.
The C7 has an integral IM 360 interface module for I/O expansion with an
external S7 standard I/O. This interface module is characterized by the
following features:
SData transmission from the IM 360 to the IM 361 of the first rack
expansion via a 368 connecting cable.
SMaximum distance between IM 360 and IM 361: 10 m
You can expand your C7 by up to three mounting racks using the IM 360
interface module.
Additional S7-300
Modules
Prerequisite
Connecting
Additional I/Os
IM 360 Interface
Module
Installing and Preparing the C7
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368 connecting cable
368 connecting cable
368 connecting cable
2345 6 . . . 11
Rack 3
34567891011
34567891011
Slot number 3 4 5 6 7 8 9 10 11
Slot number
Slot number
Slot number
Rack 2
Rack 1
Customer-specific module
IM 361
.
IM 361
IM 361
Figure 2-12 Maximum Configuration of the Slots of a C7
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2.10 C7 Clocks
A C7 system has two clocks:
SOne clock in the C7 CPU
SOne clock in the C7 OP
The clock in the C7 CPU is an integral “real-time clock” (hardware clock).
This clock is independent of the clock in the C7 OP.
The clock is supplied with the following value set:
DT#1994-01-01-00:00:00.
As an integrated clock, the C7 CPU clock can also function as the master
clock within the C7 I/O configuration (see also Section 3.4.6 in Volume 2).
You can set and read the clock in the following ways:
SWith the programming device (PG) using STEP 7
or
SIn the user program with SFC0 “SET_CLK”. With SFC1 “READ_CLK”,
you can read the current time of day (see the reference manual /235/).
The C7 must always be backed up with a battery. The clocks in the C7
continue to run during power off.
The clock in the C7 OP is independent of the clock in the C7 CPU.
The clock is supplied with the following value set:
01.01.94 -00:00.
The clock time can be set:
SVia the user program and interface block, or
SOn-line by operator input if the special display “Clock Time/Date” has
been configured and selected (see Volume 2, Section 6.7.1).
Overview
Clock in the
C7 CPU
Setting the C7 CPU
Clock
Master Clock
Setting and
Reading the Clock
in the Control
Section
Clock During
Power Off
Clock in the C7 OP
Section
Setting the O/I
Clock
Setting and
Reading the Clock
in the C7 OP
Section
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The C7 CPU provides you with a run-time meter.
You can use this meter to keep count of the operating hours of the C7 CPU or
of any controlled equipment.
You program the run-time meter in the user program with the SFCs
2 “SET_RTM”, 3 “CTRL_RTM” and 4 “READ_RTM” (see the reference
manual /235/).
Run-Time Meter
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2.11 Starting Up
The C7 comes supplied with a preloaded configuration. You can therefore
carry out a startup with the existing configuration.
However, if the configuration no longer exists (for example, after a reset),
you must carry out a startup without any configuration.
This section explains how to proceed in these cases.
Overview
Installing and Preparing the C7
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2.11.1 With a Loaded Configuration in the C7 OP
After applying the power supply the C7 carries out a self-test. The test checks
the functionality of the most important device components and displays the
results of the test via the LED status and the display screen. The following
startup will be carried out:
1. The C7 carries out a self test after power on.
2. The C7 carries out an operating system test for both parts (C7 CPU and
C7 OP).
3. During the start-up phase (1 and 2) the C7 CPU remains in STOP mode.
Once the C7 OP has been started up, the following basic screen will be
displayed:
399 Startup complete
!
Basic C7-626 picture
1 2 3 4 5
Softkey
icons for
selecting
standard
pictures
Figure 2-13 Basic C7 Picture (Example)
4. Confirm the displayed message by pressing .
Starting Up
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2.11.2 Without a Loaded Configuration in the C7 OP
Load the basic configuration so that the explanations in this manual relate to
this configuration.
Note
When starting up without a configuration, you must load a configuration via
the V.24 serial interface.
Proceed as follows:
1. Connect the V.24 serial interface of the C7 OP (see Figure 2-8) to the
programming device/PC via a programming device/PC standard cable.
2. Switch on the C7 power supply.
As no configuration is loaded, the C7 automatically goes into transfer
mode and waits for a data transfer.
3. Transfer the configuration from the programming device/PC to the
C7 OP.
The firmware of the C7 OP is automatically transferred as well.
After a successful transfer, the C7 OP is restarted.
SMessage 339 Startup complete can be removed by pressing
and the basic screen is then displayed.
339 Startup complete
!
Basic C7-626 picture
Figure 2-14 Basic C7 Picture with Message 339
In the C7 CPU Operating Modes menu, you can select either the RUN-P,
RUN, STOP or MRES function by pressing A–Z
simultaneously.
Loading the
Configuration
Setting the C7 CPU
Operating Modes
Menu
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This operation is only necessary if the basic configuration has been loaded.
DI: 00000000 0.7-0.0
00000000 1.7-1.0
DO: 11001000 0.7-0.0
10101000 1.7-1.0
CPU-MODE: RUN
RUN-P RUN STOP MRES ESC
Figure 2-15 C7 CPU Operating Modes Menu with Corresponding Function Keys
With the softkeys F9...F14, you can select one of the C7 CPU operating
modes displayed on the screen.
Choosing a C7
CPU Operating
Mode
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2.12 Status and Error LEDs on the C7
The C7-626 / C7-626 DP has the following status and error LEDs:
SF
BAF
DC5V
FRCE
RUN
STOP
Figure 2-16 Status and Fault LEDs of the C7-626 / C7-626 DP
The status and error LEDs are explained in the order in which they are
arranged on the C7.
Display Meaning Explanation
SF (red) C7 CPU group error Lights up in the event of
SHardware faults
SFirmware errors
SProgramming errors
SParameter assignment errors
SArithmetic errors
STimer errors
SDefective internal memory
SBattery failure or no backup during power on
SI/O fault/error in the internal I/O functions
You must use a programming device and display the contents of the
diagnostic buffer to determine the exact nature of the error/fault.
BAF (red) Battery fault Lights up if the battery
Shas too little voltage
Sis defective
Sis missing.
DC5V (green) 5 VDC supply for C7 Lights up if the internal 5 V voltage is O.K.
FRCE (yellow) Reserved –
RUN (green) Operating mode of
the C7 CPU Lights up if the C7 is executing a user program.
Flashes (2 Hz) during C7 startup (the STOP LED also lights up; after the
STOP LED goes out, the outputs are enabled).
STOP (yellow) Operating mode of
the C7 CPU Lights up if the C7 is not executing a user program.
Flashes at 1-second intervals if the CPU requests a memory reset.
Status and Error
LEDs
Meaning of the
Status and Error
LEDs
Installing and Preparing the C7
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Configuring MPI Networks and
PROFIBUS-DP Networks
! You can
Sintegrate the C7-626 via the MPI into an MPI network.
Sintegrate the C7-626 DP via the MPI into an MPI network or set up a
PROFIBUS-DP network via the PROFIBUS-DP interface.
SINEC-L2 DP is the PROFIBUS DP for SIEMENS devices.
The setup of an MPI network is basically the same as the setup of a
PROFIBUS-DP network. That is, the same setup rules apply, and you use the
same components for setting up both networks. There are only exceptions if
you set a transmission rate > 1.5 Mbps in the PROFIBUS-DP network. In this
case, you require special components which will be referred to in the relevant
section.
Since the setup of an MPI network does not differ from that of a
PROFIBUS-DP network, this section will simply refer to setting up a
network.
You must assign MPI/L2 addresses to the individual nodes of an MPI or
PROFIBUS-DP network to enable them to communicate with each other.
How you assign these addresses and what rules you must observe are
described in the STEP 7 manuals.
In Section You Will Find On Page
3.1 Setting Up a Network 3-2
3.2 Rules for Configuring a Network 3-5
3.3 Cable Lengths 3-12
3.4 Network Components 3-15
3.5 Bus Connectors 3-17
3.5.1 PROFIBUS Bus Connector 3-18
3.5.2 Bus Connector 6ES7 972-0B.20-0XA0 3-19
3.5.3 Bus Connector 6ES7 972-0B.10-0XA0 3-22
3.5.4 Plugging the Bus Connector into the Module 3-24
3.6 Starting Up the PROFIBUS DP 3-25
MPI/PROFIBUS DP
SINEC-L2 DP =
PROFIBUS DP
The Same Setup
Setting up the
Communication
Summary of
Sections
3
3
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3.1 Setting Up a Network
The interface of the C7 for connecting, for example, programming devices, is
called a multipoint interface since several devices can communicate with the
C7 via this interface (that is, communication can take place from several
points).
The MPI transmission rate of the C7-626 and C7-626 DP is fixed at
187.5 Kbps.
Digital, analog and intelligent modules, as well as a wide range of field
devices according to DIN E 19245 Part 3 such as drives or valve islands, are
stored locally from the automation system to the process – up to a distance of
23 km.
The modules and field devices are thus connected to the automation system
via the field bus PROFIBUS DP and addressed as local I/Os.
The DP transmission rate of the C7-626 DP can be set up to 12 Mbps.
The following table shows which nodes you can use to set up a network.
MPI PROFIBUS DP
(only with C7-626 DP)
Programming devices (PG/PC) Programming device (PG/PC)
Operator interface devices (OP) Operator interface devices (OP)
S7-300/M7-300 DP masters (C7-CPU DP)
S7-400/M7-400 Additional DP masters
Additional C7 devices DP slaves
FMs, CPs
Convention: all devices that you connect in an MPI network are called nodes.
Note that the C7 occupies two MPI addresses and therefore already consists
internally of two nodes.
A segment is a bus line between two terminating resistances. A segment can
contain up to 32 nodes.
Definition:
Multipoint
Interface (MPI)
MPI Transmission
Rate
Definition:
PROFIBUS DP
DP Transmission
Rate
Connectable
Nodes
Device / Node
Segment
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You can connect up to 126 (addressable) nodes via the MPI.
To enable all nodes to communicate with each other , you must assign them
an address:
SIn an MPI network, an “MPI address” and a “highest MPI address”.
SIn a PROFIBUS-DP network, an “L2 address” and a “highest L2
address”.
You must assign these MPI/L2 addresses to each node individually with the
programming device before networking (also, with some PROFIBUS-DP
slaves, by using the switch on the slave).
Note
The RS 485 repeater has no “MPI/L2 address”.
Table 3-1 contains all permissible MPI/L2 addresses.
Table 3-1 Permissible MPI/L2 Addresses
MPI Addresses L2 Addresses
0 to 126 0 to 125
of which reserved:
0 for programming device
1 for C7 OP
2 for C7 CPU
of which reserved:
0 for programming device
The following table shows the default MPI addresses with which the C7
devices are supplied.
Node (Device) Default
MPI Address Highest Default
MPI Adress
Programming device 0 15
C7 OP 1 15
C7 CPU 2 15
Number of Nodes
MPI/L2 Addresses
Default MPI
Addresses on the
C7
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Please observe the following rules before assigning MPI/L2 addresses:
SAll MPI/L2 addresses in a network must be different
SThe highest possible MPI/L2 address must be > the largest actual address
and must be the same for all nodes. (Exception: connecting a
programming device to several nodes; see Chapter 4).
CPs and FMs (as customized modules or in expansion racks) with their own
MPI address have the following special feature: their MPI address is
determined automatically by the C7 and assigned according to the following
system:
MPI-C7 address
(1 for C7 OP
2 for C7 CPU)
MPI addr.
C7 CPU+1 MPI addr.
C7 CPU+2
C7 CP CPIM361
Figure 3-1 Automatic Assignment of MPI Addresses for CPs and FMs
Please note the following characteristics in the MPI network:
!Warning
Loss of data packets in the MPI network.
If you connect another CPU to the MPI network during operation, you may
lose GD packets and increase the scan cycle time.
Remedy:
1. Switch off the node to be connected.
2. Connect the node to the MPI network.
3. Switch on the node.
A C7 CPU can communicate with up to four further CPUs. They can
exchange global data. For detailed information on global data, please refer to
/231/.
Sending and receiving global data occurs in GD circles. Each C7 CPU may
participate in up to four different GD circles.
Rules for the
MPI/L2 Addresses
Special Features
of CPs and FMs
Data Packets in the
MPI Network
CPU to CPU
Communication
GD Circle
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3.2 Rules for Configuring a Network
In this section you will be shown
Show to configure an MPI network
Swhich rules you must observe.
The rules for an MPI network and an L2 network are identical.
You must observe the following rules when connecting the nodes of a
network:
SBefore you interconnect the individual nodes of the network, you must
assign the MPI address and the highest MPI address or the L2 address and
the highest L2 address for each node (with the exception of the RS 485
repeater).
Tip: Mark all nodes in a network with the address on their housings. In
this way, you can always see which node has been assigned which address
in your system.
SConnect all nodes in the network as shown in Figure 3-5; that is, integrate
the stationary programming devices and OPs directly into the network.
Note
For 3 Mbps and above, you may only use bus connectors with the order
numbers 6ES7 972-0B.10-0XA0 or 6ES7 972-0B.20-0XA0 for connecting
nodes.
Connect only those programming devices/OPs that are required for
startup or maintenance via spur lines to the network.
Note
For 3 Mbps and above, you may only use the programming device
connecting cable with the order number 6ES7 901-4BD00-0XA0 to connect
the programming device.
Overview
Rules
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SIf you are operating more than 32 nodes in a network, you must link the
bus segments via RS 485 repeaters.
In a PROFIBUS-DP network, all of the bus segments together must have
at least one DP master and one DP slave.
SUngrounded bus segments and grounded bus segments are connected via
RS 485 repeaters.
SEach RS 485 repeater used reduces the maximum number of nodes per
bus segment. This means, if there is an RS 485 repeater in a bus segment,
there can then only be a maximum of 31 further nodes in the bus segment.
The number of RS 485 repeaters has no effect on the maximum number
of nodes on the bus.
There can be up to 10 segments in one row.
SSwitch the terminating resistance on at the geographical end point of the
network (see Section 3.3).
SBefore you insert a new node into the network, you must switch off the
supply voltage.
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The MPI addresses set at the factory should not be assigned as fixed node
addresses since, otherwise, address conflicts (double MPI addresses) can
arise when devices are replaced or the network is expanded.
SReserve the MPI address “0” for a service programming device.
SReserve the address “1” for the C7 OP.
SReserve the address “2” for the C7 CPU.
This avoids double assignment of MPI addresses after installing a further
preset C7 or S7-300 in the MPI network (for example, when replacing a C7).
Reserve the L2 address “0” for a service programming device which may be
temporarily connected to the L2-DP network at a later stage if required. You
should therefore assign other L2 addresses to the programming devices
included in the L2-DP network.
You connect the individual nodes via the bus connectors and the PROFIBUS
bus cable. Remember to provide for the nodes a bus connector with
programming device socket to which a programming device can be
connected if required (see also Section 3.5).
Use the RS 485 repeater for connections between segments or for extending
cables.
See the reference manual /71/ for details of how to install and use a repeater.
A cable must be terminated with a surge impedance. To do this, switch on the
terminating resistance at the first and last node of the network.
At least one of these two nodes must be supplied with power.
Figure 3-2 shows you where to connect the terminating resistance on the bus
connector.
on
off
Terminating
resistance
switched off
on
off
Terminating
resistance
switched on
Figure 3-2 Terminating Resistance on the Bus Connector
Recommendation
for MPI Addresses
in the Network
Recommendation
for PROFIBUS
Addresses
Components
Using the RS 485
Repeater
Terminating
Resistance
Terminating
Resistance On Bus
Connector
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Figure 3-3 shows you where to connect the terminating resistance on the
RS 485 repeater.
DC
24
V
L+ M PE M 5.2
A1 B1A1B1
A2B2A2B2
SIEMENS
RS 485-REPEATER
ON
ON Terminating
resistance
Bus segment 1
Terminating
resistance
Bus segment 2
Figure 3-3 Terminating Resistance on the RS 485 Repeater
Using a possible MPI network configuration, Figure 3-4 shows where you
must connect the terminating resistance.
RS 485
repeater
➀
➀
➀
➀Terminating resistance switched on
S7-300 S7-300
C7
Spur line
S7-300
➀
OP 25 OP 25
PG
PG*
* Only connected via spur line at startup or during service work
Figure 3-4 Switching Terminating Resistances in an MPI Network
Terminating
Resistance On
RS 485 Repeater
Example of
Terminating
Resistance in the
MPI Network
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Figure 3-5 shows the main setup of an MPI network according to the rules
listed above.
S7-300
S7-300S7-300
PG*
0
16
0 ... x MPI addresses of the nodes
12131415
5 86+7
C7 C7 PG
9
S7-300 CP
PROFIBUS-DP
Network***
10
S7-300 FM
11
* Only connected via spur line at startup or during service work(with default MPI address)
OP 25**OP 25
** Connected to the MPI network afterwards (with default MPI adress)
*** The CP has an L2 address as well as the MPI address (here, address 10)
➀
➀Terminating resistance switched on
➀3 + 4
Figure 3-5 Example of an MPI Network
Example of an MPI
Network
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Figure 3-6 shows the main setup of a PROFIBUS-DP network according to
the rules listed above.
* Only connected to MPI via spur line at startup or during service work (with MPI address = 0)
0 ... x L2 addresses of the nodes
C7-626 DP as
DP master ET 200M
0
11 78910
23456
ET 200M S5-95U
ET 200BET 200B
➀
➀
➀ Terminating resistance switched on
ET 200M
ET 200M
ET 200M ET 200B ET 200B
PG**
1 = Default L2 address for DP master
1*
3+4
0 ... x MPI addresses of the nodes
Figure 3-6 Example of a PROFIBUS-DP Network
Example of a
PROFIBUS-DP
Network
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Figure 3-7 shows an example of a setup with the C7-626 DP, which is
integrated in an MPI network and at the same time used as a DP master in a
PROFIBUS-DP network.
OP 25
C7-626 DP as
DP master ET 200M
S5-95U
ET 200B
RS 485
repeater
PG*
S7-300
S7-300
S7-300 OP 25
ET 200M
S5-95U
ET 200B
➀ Terminating resistance switched on
* Only connected via spur line at startup or during service work (with default MPI address)
➀
➀
➀
L2-DP networkMPI network
S5-95U
➀
➀
ET 200B
ET 200B
3 + 4
5
67
8 + 9
10
12
3
4
5
6
87
10 9
0 ... x MPI addresses of the nodes
L2 addresses of the nodes
0
C7-626 DP
C7-626 DP
➀
11
Figure 3-7 Example of a Setup with the C7-626 DP in the MPI and PROFIBUS-DP Networks
Example with
C7-626 DP
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3.3 Cable Lengths
You can implement cable lengths up to 50 m in a segment of an MPI
network. The 50 m applies from the first node to the last node of the
segment.
Table 3-2 Permissible Cable Length of a Segment in an MPI Network
Transmission Rate Max. Cable Length of a Segment
(in m)
187.5 Kbps 50*
*with non-isolated interface
In a segment of a PROFIBUS-DP network, the cable length depends on the
transmission rate (see Table 3-3).
Table 3-3 Permissible Cable Length of a Segment in a PROFIBUS-DP Network
Depending on the Transmission Rate
Transmission Rate Max. Cable Length of a Segment
(in m)
9.6 to 187.5 Kbps 1000*
500 Kbps 400
1.5 Mbps 200
3 to 12 Mbps 100
*with isolated interface
If you implement longer cable lengths than those permissible in one segment,
you must use RS 485 repeaters. The maximum possible lengths between two
RS 485 repeaters correspond to the cable length of a segment. However,
when using these maximum cable lengths, note that there must be no other
node (remote segment) between the two RS 485 repeaters. You can connect
up to nine RS 485 repeaters in series.
When calculating the total number of nodes to be connected, note that an
RS 485 repeater counts as a node of the network, even if it has not been
assigned its own MPI/L2 address.
Figure 3-8 illustrates the principle of “cable extension” with RS 485
repeaters for the MPI.
Segment in an MPI
Network
Segment in a
PROFIBUS-DP
Network
Longer Cable
Lengths
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C7
50 m 1000 m 50 m
RS 485
repeater
PROFIBUS bus cable
(“Remote segment”)
Figure 3-8 Maximum Cable Length Between Two RS 485 Repeaters
If you do not assemble the bus cable directly onto the bus connector (for
example, when using an L2 bus terminal), you must take into account the
maximum possible spur line length.
The following table shows which maximum lengths of spur lines are
permitted per bus segment:
For 3 Mbps and above, use the programming device connecting cable with
order number 6ES7 901-4BD00-0XA0 to connect the programming device or
PC. You can use several programming device connecting cables with this
order number in one bus setup. Other spur lines are not permitted.
Table 3-4 Length of the Spur Lines per Segment
Transmission
Rate Max. Length of
Spur Line per
St
Number of Nodes with a Spur
Line Length of ...
Segment 1.5 m or 1.6 m 3 m
9.6 to 93.75 Kbps 96 m 32 32
187.5 Kbps 75 m 32 25
500 Kbps 30 m 20 10
1.5 Mbps 10 m 6 3
3 to 12 Mbps – – –
Length of Spur
Lines
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Figure 3-9 shows a possible MPI network configuration. The example
indicates the maximum possible distances in an MPI network.
RS 485
repeater
RS 485
repeater
max. 50 m
max. 50 m
max.
1000m
➀
➀
➀
➀
➀
➀
➀ Terminating resistance switched on
C7 S7-300 S7-300
S7-300 S7-300
Spur line
➁
➁ Programming device connected for maintenance purposes via spur line
0
12
0 ... x MPI addresses of the nodes
8
91011
3+4 5 6 7
OP 25
PG*
PG*
OP 25
OP 25
”Remote Segment”
Figure 3-9 Cable Lengths in an MPI Network
Example
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3.4 Network Components
You require network components...
Table 3-5 Network Components
Purpose Component
... for setting up a network PROFIBUS bus cable
... for connecting a node to the
network Bus connector
... for amplifying the signal
... for linking segments
RS 485 repeater
... for converting the signal to
fiber-optic transmission
(PROFIBUS DP network only)
Optical Link Module
... for connecting programming
devices/OPs to the network Programming device cables
(spur lines)
We offer the following PROFIBUS bus cables:
Table 3-6 Bus Cables
PROFIBUS bus cable
PROFIBUS direct-buried cable
PROFIBUS drum cable
PROFIBUS bus cable with PE sheath (for food and drinks industry)
PROFIBUS bus cable for festooning
The PROFIBUS bus cable is a two-core, twisted and shielded cable with the
following characteristics:
Table 3-7 Characteristics of the PROFIBUS Bus Cable
Features Values
Surge impedance Approx. 135 to 160 Ω (f = 3 to 20
MHz)
Loop resistance x 115 Ω/km
Operating capacitance 30 nF/km
Attenuation 0.9 dB/100 m (f = 200 kHz)
Permissible core cross-section 0.3 mm2 to 0.5 mm2
Permissible cable diameter 8 mm " 0.5 mm
Purpose
PROFIBUS Bus
Cable
Characteristics of
the PROFIBUS Bus
Cable
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When laying the PROFIBUS bus cable, you must not
Stwist it,
Sstretch it or
Spress it.
In addition, when laying the interior bus cable, you must observe the
following boundary conditions (dA = outer diameter of the cable):
Table 3-8 Boundary Conditions when Laying the Interior Bus Cable
Features Edge Conditions
Bending radius when bent once w 80 mm (10 dA)
Bending radius when bent several times w 160 mm (20 dA)
Permissible temperature range when laying – 5 _C to + 50 _C
Storage and stationary operating temperature – 30 _C to + 65 _C
Rules for Cable
Laying
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3.5 Bus Connectors
The bus connector is used for connecting the PROFIBUS bus cable to the
MPI. This is how the connection to further nodes is established.
There are five different bus connectors:
SUp to 12 Mbps PROFIBUS bus connector (6GK1500-0EA00)
SUp to 12 Mbps
– Without PG-type connector (6ES7 972-0BA10-0XA0)
– With PG-type connector (6ES7 972-0BB10-0XA0)
SUp to 12 Mbps, optionally with vertical or angular outgoing cable
– Without PG-type connector (6ES7 972-0BA20-0XA0)
– With PG-type connector (6ES7 972-0BB20-0XA0)
The bus connectors are not required for the RS 485 repeater.
Purpose of the
Bus Connector
No Application
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3.5.1 PROFIBUS Bus Connector
Figure 3-10 shows the PROFIBUS bus connector 6GK1500-0EA00.
Diagram II:
Bus connection for the first and last stations on the PROFIBUS BUS. The
cable can be connected on the left or the right.
①Switch position to “ON” for the first and last stations on the PROFIBUS:
“ON” (terminating resistance switched on).
②Cable shielding must lie bare on the metal guide.
Diagram III:
①Terminating resistance switched off.
②Cable shielding must lie bare on the metal guide.
①
②
②
①
Figure 3-11 PROFIBUS Bus Connector
Appearance
(6GK15000-0EA00)
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Connect the bus cable to the PROFIBUS bus connector with the order
number 6CGK1500-0EA00 as follows:
1. Strip the insulation off the cable.
2. Insert the green and red wires into the screw-type terminal block.
3. Press the cable sheath between both sides of the screw-type terminal.
4. Screw the green and red wires tightly into the screw-type terminal.
Cable shield
Screw clamp for the
bus cable connection
PROFIBUS bus cable
6XV1 830-0AH10
Figure 3-12 Connecting the PROFIBUS Bus Cable to the Screw-Type Terminal
Block
3.5.2 Bus Connector 6ES7 972-0B.20-0XA0
Figure 3-13 shows the bus connector 6ES7 972-0B.20 ...:
Screws for fixing
to station
PG-type connector
(only with 6ES7
972-0BB20-0XA0)
9-pin sub D connector
for connection to station
Housing screw
Switch for
terminating resistance
Clamp-type hinge
for vertical or 30°
outgoing cable
Figure 3-13 Bus Connector (Order Number 6ES7 972-0B.20 ...)
Assembling the
Bus Cable
Appearance
(6ES7-972-0B.20 ...)
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Connect the bus cable to the bus connector 6ES7 972-0B.20 ... as follows:
1. Strip the insulation off the bus cable as shown in Figure 3-14.
5.5
11
13
2
AB
5.5
6
7.3
2
AB
5.5
5.5
4
4.3
2
AB
5.5
5.3
2
AB
with PG-type connector
5.5
5
2
AB
5.5
5.3
2
AB
5.5
7
8
2
AB
with PG-type connector
5.5
11
13
2
AB
Outgoing cable, vertical
without PG-type connector
Outgoing cable, angular
without PG-type connector
Figure 3-14 Length of Stripped Insulation for Connecting to the Bus Connector
6ES7 972-0B.20 ...
2. Open the housing of the bus connector by loosening the housing screw
and swinging the cover upward.
3. Remove the clamp-type hinge cover.
4. The bus connector 6ES7 972-0B.20 is supplied for an angular outgoing
cable.
If a vertical outgoing cable arrangement is required:
– Loosen the screw at the left side of the hinge.
– Slightly lift the hinge.
– Turn the hinge inward.
– To fix the hinge, tighten the screw on the left.
Assembling the
Bus Cable
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5. Insert the green and red wires into the screw-type terminal block as
shown in Figure 3-15.
Make sure that you always connect the same wires at the same terminal,
A or B (for example, always connect the green wire to terminal A and the
red wire to terminal B).
Bus cable connection for first
and last stations on the
bus1
Bus cable connection for all
other stations on the bus
1 The bus cable can be connected on the right or on the left
A B A B A B A B
ÇÇ
ÇÇ
Figure 3-15 Connecting the Bus Cable to the Bus Connector (6ES7 972-0B.20 ...)
6. Screw tight the clamp-type hinge cover.
Make sure that the cable shielding is bare under the shielding clip.
7. Tighten the green and red wires in the screw-type terminal.
8. Close the cover of the bus connector and
9. Screw the housing back on.
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3.5.3 Bus Connector 6ES7 972-0B.10-0XA0
Table 3-9 shows the bus connectors 6ES7 972-0B.10-0XA0.
Table 3-9 Description and Function of the Bus Connectors 6ES7 972-0B.10-0XA0
Appearance of the Bus Connectors No. Function
with PG-type connector
➀
➃
➄
without PG-type connector
➀
➄
➀
Connection to
the MPI,
PROFIBUS-DP
interface (9-pin
sub D connector)
➄
➄
➁Connection for
the PROFIBUS
bus cable
➂
➂
➂Terminating
resistance
➁
➂
➁
➂
➃Interface for
PG/OP
➁
➁
➄Screws for fixing
to the node
Proceed as follows to connect the PROFIBUS bus cable to the bus connector
6ES7 972-0B.10-0XA0:
1. Cut the bus cable to the desired length.
2. Insulate the bus cable according to Figure 3-16.
ÇÇ
ÇÇ
7.5 9
6
ÇÇ
ÇÇ
7.5 9
6
6XV1 830-0AH10/-3BH10 6XV1 830-3AH10
16
Figure 3-16 Length of Bared Wire for Connecting to the Bus Connector
3. Open the housing of the bus connector by loosening the housing screws.
4. Remove the cover.
Appearance
Assembling the
PROFIBUS Bus
Cable for Bus
Connectors
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5. Insert the green and red wires into the screw-type terminal block as
shown in Figure 3-17.
Make sure that you always connect the same wires at the same terminal,
A or B (for example, always connect the green wire to terminal A and the
red wire to terminal B).
6. Press the cable sheath between both sides of the screw-type terminal
block. This will hold it in place.
7. Screw the green and red wires tightly into the screw-type terminal block.
ÇÇ
A B A B
ÇÇ
A B A B
ÇÇ
Bus cable connection for first and
last nodes on the network. Bus cable connection for all
further nodes on the network.
The bus cable can be
connected on the right
or on the left
Figure 3-17 Connecting the Bus Cable to the Bus Connector
(6ES7 972-0B.10-0XA0)
8. Screw the housing back on.
Make sure that the cable shielding is bare under the shielding clip.
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3.5.4 Plugging the Bus Connector into the Module
Proceed as follows to connect the bus connector:
1. Plug the bus connector into the module.
2. Screw the bus connector to the module.
3. If the bus connector (order number 6ES7 ...) is at the start or end of a
segment, you must switch on the terminating resistance (switch position
“ON”) (see Figure 3-18).
Make sure that the stations with the terminating resistance are always
supplied with power during power up and during operation.
Terminating resistance
switched on Terminating resistance
not switched on
on
off
on
off
Figure 3-18 Bus Connectors (6ES7 ...): Terminating Resistance Switched On and
Not Switched On
You can remove the bus connector with a looped-through bus cable from
the PROFIBUS-DP interface at any time without interrupting data traffic on
the bus.
!Warning
Possibility of interrupting data traffic on the bus!
A bus segment must always be terminated at both ends by the terminating
resistance. This is not the case if the last slave with bus connector is not
supplied with power. Since the bus connector draws its power from the node,
the terminating resistance is ineffective.
Make sure that the stations at which the terminating resistance is switched on
are always supplied with power.
Connecting the
Bus Connector
Removing the Bus
Connector
Configuring MPI Networks and PROFIBUS-DP Networks
3
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3.6 Starting Up the PROFIBUS DP
In this section, you are shown how to proceed when starting up a
PROFIBUS-DP network with a C7-626 DP as a DP master.
Before you can start up the PROFIBUS DP network, the following steps must
be carried out:
SThe PROFIBUS-DP network must be set up (see Section 3.1).
SUsing STEP 7, you must have configured the PROFIBUS-DP network
and assigned all nodes an L2 address and an address space (see /70/).
Note that with some DP slaves a PROFIBUS address switch must be set
(see description of the relevant DP slaves).
Start up the PROFIBUS DP network as follows:
1. Using STEP 7, load the configuration of the PROFIBUS-DP network
(setpoint configuration) using the programming device into the C7-DP
CPU. This is described in /70/.
2. Switch on all DP slaves.
3. Switch the C7-DP CPU from STOP to RUN.
On startup, the C7-DP CPU checks the setpoint configuration with the actual
configuration. You can adjust the length of the check with STEP 7 in the
parameter block “Start-Up Characteristics” with the parameter “Module
T ime Limits”.
If the setpoint configuration = actual configuration, then the C7-DP CPU
goes to RUN mode.
If the setpoint configuration actual configuration, then the behavior of the
C7-DP CPU depends on the parameter setting “Startup at setpoint Actual
configuration”:
Startup at setpoint Actual
configuration = yes (default
setting)
Startup at setpoint Actual configuration = no
C7-DP CPU goes into RUN
mode C7-DP CPU remains in STOP mode and after the
time set in the parameter “Module T ime Limits” has
elapsed, the BUSF LED flashes.
The flashing of the BUSF LED shows that at least
one DP slave cannot be addressed. In this case, check
whether all the DP slaves are switched on and that it
matches the established configuration, or display the
diagnostic buffer with STEP 7.
To set the parameters in the parameter block “Start-Up Characteristics”, see
Section 10.11.2 in /70/ and also the STEP 7 on-line help.
Introduction
Prerequisites
Starting Up
Behavior of the C7
DP CPU on Startup
Configuring MPI Networks and PROFIBUS-DP Networks
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Configuring MPI Networks and PROFIBUS-DP Networks
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4.1 Connecting a Programming Device/PC to a C7
This chapter explains how you can connect a programming device or PC to
the C7 via a multipoint interface.
You can connect a programming device or PC with the MPI of the C7 using a
prefabricated programming device cable.
Alternatively, you can make up the connecting cable yourself using the
PROFIBUS bus cable and bus connectors (see Section 3.5).
Figure 4-1 shows the components for connecting a programming device/PC
to a C7.
Programming
device cable
Programming Device/PC
C7
Figure 4-1 Connecting a Programming Device/PC to a C7
Possibilities
Connecting a
Programming
Device/PC to a C7
Connecting a Programming Device / PC to a C7
4
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4.2 Connecting a Programming Device/PC to Several Nodes
This chapter shows you how to connect a programming device or PC to
several networked nodes via the MPI.
When you connect a programming device/PC to several nodes, you must
differentiate between two installation variants:
SFixed installation of the programming device/PC in the MPI network
SProgramming device/PC connected for startup and maintenance purposes.
Depending on this, you connect the programming device/PC with the other
nodes as follows (see also Section 3.2):
Installation Variant Connection
Fixed installation of the
programming device/PC in the MPI
network
The programming device/PC is
linked directly into the MPI network
Programming device/PC connected
for startup and maintenance
purposes
The programming device/PC is
connected to one node via a spur
line
Possibilities
Two Installation
Variants
Connecting a Programming Device / PC to a C7
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With fixed installation of a programming device/PC in the MPI network, you
connect the programming device/PC via a bus connector directly with the
other nodes of the MPI network in accordance with the rules listed in
Section 3.2.
Figure 4-2 shows a C7 network with two C7s. Both C7s are connected to
each other via the PROFIBUS bus cable.
PROFIBUS bus cable
C7
C7
PG/PC
PROFIBUS bus cable
Figure 4-2 Connecting a Programming Device to Several C7s
If there is no stationary programming device/PC available, we recommend
the following:
In order to connect a programming device/PC for service purposes to an MPI
network with “unknown” node addresses, we recommend that you set the
following address on the service programming device/PC:
SMPI address: 0
SHighest MPI address: 126.
Then find out the highest MPI address in the MPI network using the STEP 7
application Hardware Configuration and adjust the highest MPI address on
the programming device/PC to match that of the MPI network.
Fixed Installation
of Programming
Device/PC
Connecting the
Programming
Device/PC for
Service Purposes
Connecting a Programming Device / PC to a C7
4
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For startup or maintenance purposes, connect the programming device/PC
via a spur line to a node of the MPI network. The bus connector of this node
must possess a PG-type connector for this purpose (see also Section 3.5).
Figure 4-3 shows two networked C7s to which a programming device/PC is
connected.
PROFIBUS bus cable
PG cable
= single feeder
C7
PG/PC
C7
Figure 4-3 Connecting a Programming Device/PC to an MPI Network
Programming
Device/PC for
Startup or
Maintenance
Connecting a Programming Device / PC to a C7
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Connecting a Programming Device / PC to a C7
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5.1 Digital Input Function
The digital input function has the following characteristics:
S16 inputs, isolated as a group
SNominal input voltage: 24 VDC
SSuitable for switches and 2-wire proximity switches (BEROs), for
example.
Figure 5-1 shows the terminal connection and the block diagram of the
digital input function.
Channel number
Pin No.
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
Parts with this shading
are not relevant to this
example.
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
Digital inputs
1L+
1M 24 V for DI
Ground for DI
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
Block diagram
24 V
1L+
Minternal
Bottom view of C7
1M
Figure 5-1 Terminal Connection and Block Diagram of the Digital Input Function
Characteristics
Terminal
Connection and
Block Diagram
C7 Digital Input/Output
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Specific Data of the Digital Input Function
Number of inputs 16
Cable length
SUnshielded 600 m
Voltages, Currents, Potentials
Nominal load voltage L + 24 VDC
Number of simultaneously
energizable inputs 16
Galvanic isolation
SIn groups of
Yes (optocoupler)
16
Permissible potential
difference
SBetween the M terminals
of the groups
SInsulation resistance
–
500 VDC
Status, Interrupts, Diagnostics
Interrupts No
Diagnostic functions No
Data for Selecting a Sensor
Input voltage
SNominal voltage
SFor “1” signal
SFor “0” signal
24 VDC
from 11 to 30 V
from -3 to 5 V
Input current
SFor “1” signal from 6 to 11.5 mA
Input delay time
SProgrammable
SAt “0” to “1”
SAt “1” to “0”
No
from 1.2 to 4.8 ms
from 1.2 to 4.8 ms
Input characteristic In accordance with
DIN EN 61131-2
(IEC 1131, Part 2)
Type of input in accordance
with IEC 1131 Type 2
Connection of 2-wire BEROs
SPermissible quiescent
current
Possible
2 mA
C7 Digital Input/Output
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5.2 Digital Output Function
The digital output function has the following characteristics:
S16 outputs, isolated.
SOutput current: 0.5 A
SNominal load voltage: 24 VDC
SSuitable for solenoid valves and d.c. contactors.
The digital outputs may be briefly activated under the following conditions:
SApplying the DI/DO power supply (independently of the 24V/GND
wiring)
SApplying the 24V/GND, if the DI/DO power supply is already wired.
A pulse can be approximately 50 µs within the permissible output voltage
range. You must observe this when using digital outputs in conjunction with
high speed counters.
Characteristics
Special Feature
C7 Digital Input/Output
5
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Figure 5-2 shows the terminal connection and the block diagram of the
digital outputs.
Channel number
Pin No.
Parts with this shading
are not relevant to this
example.
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
Digital outputs
2L+
2L+
2M
3L+
3L+
3M
Load power supply
Pin No.
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
Block diagram
2L+
2M
+24 V
Ground
+24 V
Ground
}
}
DO 0.0...0.7
DO 1.0...1.7
Bottom view of C7
Figure 5-2 Terminal Connection and Block Diagram of the Digital Outputs
If the maximum permissible current is utilized for the load power supply,
both pins should be wired to avoid overloading of the contacts. For relatively
low currents, wiring of only one +24 V pin is sufficient.
Terminal
Connection and
Block Diagram
Connection of
Load Power
Supply
C7 Digital Input/Output
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Specific Data of the Digital Output Function
Number of outputs 16
Cable length
SUnshielded 600 m
Voltages, Currents, Potentials
Nominal load voltage L + 24 VDC / 0.5 A
Total current of the outputs
(per group) 2 A
Galvanic isolation
SIn groups of
Yes (optocoupler)
8
Insulation resistance 500 VDC
Status, Interrupts, Diagnostics
Interrupts No
Diagnostic functions No
Data for Selecting an Actuator
Output voltage
SAt “1” signal L + (– 0.8 V)
Output current
SAt “1” signal
nominal value
Permissible range
SAt “0” signal (quiescent
current)
0.5 A
5 mA..0.5 mA
max. 0.5 mA
Lamp load max. 5 W
Parallel switching of 2 outputs
SFor logic operations
SFor enhancing
performance
Possible (outputs of
the same group only)
Not possible
Activating a digital input Yes
Max. switching frequency
SWith resistive load/lamp
load
SWith inductive load
100 Hz
0.5 Hz
Inductive cutoff voltage
limited (internally) to L + (– 48 V)
Short-circuit protection of the
outputs
SOperating point
Yes, electronically
timed
1 A
C7 Digital Input/Output
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5.3 Status Bits of the DI/DO
The process image of the digital I/O can be displayed using a C7 system
function. There are two different states:
SInputs are read directly from the process and are displayed in BIN format.
SOutputs are read from the process image (PIQ) and are displayed in BIN
format.
In STOP mode, the real process status for the outputs = 0. The process image
displayed may differ from this; it is the last thing to be set by the control
program.
You do not require any server password level to select the DI/DO status
display. You can select the function by pressing A–Z
simultaneously.
DI: 00000000 0.7-0.0
00000000 1.7-1.0
DO: 11001000 0.7-0.0
10101000 1.7-1.0
CPU-MODE: RUN
RUN-P RUN STOP MRES ESC
➀➁
Figure 5-3 DI/DO Status Bits in a C7
Table 5-1 Explanation of the DI/DO Display in Figure 5-3
Point Explanation
➀Signal state of the DI/DO
S1 DI/DO set
S0 DI/DO reset
➁Pin number from - to. See also connector pin assignment in Section
2.5.
Overview
Selecting the DI/
DO Status Display
C7 Digital Input/Output
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Note
The values of the DI/DO are read and displayed every 500 ms (default
value). Changes which occur between these times are not displayed.
Exit the DI/DO status display by pressing .Exiting the DI/DO
Status Display
C7 Digital Input/Output
6-1
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C79000-G7076-C626-01
C7 Analog Input/Output
In Section You Will Find On Page
6.1 Connecting T ransducers to Analog Inputs 6-2
6.1.1 Connecting Voltage and Current Transducers 6-5
6.2 Connecting Loads/Actuators to the Analog Output 6-6
6.3 Analog Input Function 6-9
6.3.1 Characteristics and Technical Specifications of the
Analog Input Module 6-10
6.4 Analog Output Function 6-15
The C7 cannot be installed in an ungrounded configuration.
Summary of
Sections
Ungrounded
Configuration
6
6
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6.1 Connecting Transducers to Analog Inputs
You can connect various types of transducers to the analog inputs:
SVoltage transducers
SCurrent transducers
To reduce electrical interference, you should use twisted-pair shielded cables
for the analog signals. The shield of the analog signal cables should be
grounded at both cable ends. If there are potential differences between the
cable ends, an equipotential bonding current can flow over the shield. This
can interfere with the analog signals. In such a case, you should ground the
shield at one end of the cable only.
The analog input is isolated and so there is no electrical connection between
the reference point of the measuring circuit MANA and the M terminal of the
C7 power supply (see Figure 6-1).
A potential difference VISO can occur between the reference point of the
measuring circuit MANA and the M terminal of the C7. Make sure that VISO
does not exceed the permissible value. Where it is possible that the
permissible value might be exceeded (see technical specifications), establish
a connection between the MANA terminal and the M terminal of the C7.
A potential difference VCM (common mode voltage) may occur between the
measuring line AIx-M of the input channels and the reference point of the
measuring circuit MANA. However, this potential difference must not exceed
the permissible value. Where it is possible that the permissible value for VCM
might be exceeded, or where you cannot determine the difference in potential
accurately, you must connect AIx-M to MANA. Please observe this also for
the unused inputs.
The abbreviations used in Figures 6-1 to 6-3 have the following meanings:
AIx-X: Measuring line AIx-U or AIx-I
AIx-M: Reference potential of the measuring line
MANA: Reference potential of the analog measuring circuit
M: Ground terminal of the C7
VCM: Potential difference between inputs and MANA
VISO: Potential difference between MANA and the M terminal of the
C7
Overview
Cables for Analog
Signals
Isolated Analog
Input
Connecting
Transducers to
Analog Inputs
Abbreviations
C7 Analog Input/Output
6
6-3
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The isolated transducers are not connected with the local ground potential.
They can be operated free of potential. Local conditions or interference can
cause potential differences VCM (static or dynamic) to occur between the
measuring lines M of the input channels and the reference point of the
measuring circuit MANA. However, this potential difference must not exceed
the permissible value. Where it is possible that the permissible value for VCM
might be exceeded, or where you cannot determine the difference in potential
accurately, you must connect AIx-M to MANA.
Figure 6-1 shows the principle of connecting isolated transducers to an
isolated analog input module.
Isolated
transducers
AIx-X
MANA
C7 CPU
VCM
ADC
M
VISO
Lo
gic
AIx-M
AIx-X
AIx-M
L+
C7
Ground bus
Figure 6-1 Connecting Isolated Transducers to an Isolated Analog Input Module
The non-isolated transducers are connected on-site with the ground potential.
Depending on local conditions or interference, potential differences (static or
dynamic) can occur between the locally distributed measuring points. To
prevent these potential differences, you must provide equipotential bonding
conductors between the measured value points.
In addition, potential differences VCM (static or dynamic) can arise between
the measuring lines AIx-M of the input channels and the reference point of
the measuring circuit MANA. However, these potential differences must not
exceed the permitted value. Where it is possible that the permissible value
for VCM might be exceeded, or where you cannot determine the difference in
potential accurately, you must connect AIx-M to MANA.
Figure 6-2 shows the principle of connecting non-isolated transducers to an
isolated analog input module.
Isolated
Transducers
Non-Isolated
Transducers
C7 Analog Input/Output
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Non-isolated
transducers
MANA
C7 CPU
VCM
ADC
Ground bus
VISO
Lo
gic
AIx-X
AIx-M
AIx-X
AIx-M
C7
M
L+
Figure 6-2 Connection of Non-Isolated Transducers to an Analog Input Module
C7 Analog Input/Output
6
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6.1.1 Connecting Voltage and Current Transducers
The abbreviations and mnemonics used in Figures 6-3 to 6-4 have the
following meanings:
AIx-X: Measuring line AIx-I or AIx-U
AIx-M: Reference potential of the measuring line
MANA: Reference potential of the analog measuring circuit
Figure 6-3 shows the connection of voltage transducers to an isolated analog
input.
MANA
ADC
+
–
U
+
–
UC7 CPU
Lo
gic
AIx-U
AIx-M
AIx-U
AIx-M
Figure 6-3 Connecting Voltage Transducers to an Isolated Analog Input
4-wire transducers possess a separate voltage supply. Figure 6-4 shows the
connection of current transducers as 4-wire transducers to a non-isolated
analog input module.
MANA
ADC
P
P
Transducers, e.g.
pressure gauges
transducers
4-wire
+
–
+
–
L+ M
C7 CPU
Lo
gic
AIx-U
AIx-M
AIx-U
AIx-M
Figure 6-4 Connecting 4-W ire T ransducers to a Non-Isolated Analog Input Module
Abbreviations and
Mnemonics
Connecting
Voltage
Transducers
Connecting
Current
Transducers as
4-Wire
Transducers
C7 Analog Input/Output
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6.2 Connecting Loads/Actuators to the Analog Output
You can provide loads/actuators with current or voltage using the analog
output.
To reduce electrical interference, you should use twisted-pair shielded cables
for the analog signals. The shield of the analog signal cables should be
grounded at both cable ends. If there are potential differences between the
cable ends, an equipotential bonding current can flow over the shield. This
can interfere with the analog signals. In such a case, you should ground the
shield at one end of the cable only.
The analog output is isolated and so there is no electrical connection between
the reference point of the AO-M analog circuit and the M terminal of the C7.
A potential difference VISO can occur between the reference point of the
analog circuit MANA and the M terminal of the C7. Make sure that VISO does
not exceed the permissible value. Where it is possible that the permissible
value might be exceeded (see technical specifications), establish a connection
between the AO-M terminal and the M terminal of the C7.
The abbreviations and mnemonics in the Figures 6-5 to 6-6 have the
following meanings:
AO-I: Analog output: current
AO-U: Analog output: voltage
RL: Load/actuator
AO-M : Ground terminal (reference potential of the analog output)
L+: Terminal for 24 VDC supply voltage
MISO: Potential difference between MANA and the M terminal of the
C7.
Figures 6-5 to 6-6 show you how to connect loads/actuators to the current
and/or voltage outputs of the analog output module.
Overview
Cables for Analog
Signals
Isolated Analog
Output
Abbreviations and
Mnemonics
C7 Analog Input/Output
6
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You must connect loads to a current output at QI and the reference point of
the analog circuit MANA
Figure 6-5 shows the principle of connecting loads to a current output of an
isolated analog output module.
C7 CPU DAC
RL
AO-I
Ground bus
VISO
Lo
gic
C7
M
L+
AO-M
Figure 6-5 Connecting Loads to a Current Output of an Isolated Analog Output
Module
Connection of loads to a voltage output is only possible in 2-wire circuits as
there is only one output.
Connecting Loads
to a Current
Output
Connecting Loads
to a Voltage
Output
C7 Analog Input/Output
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2-wire connection of loads to a voltage output is carried out at terminal QV
and the reference point of the measuring circuit MANA.
Figure 6-6 shows the principle of connecting loads to a voltage output of a
non-isolated analog output module with 2-wire connection.
C7 CPU DAC
Ground bus
Lo
gic RL
AO-U
C7
M
L+ VISO
AO-M
Figure 6-6 2-Wire Connection of Loads to a Voltage Output of an Analog Output
Module
2-Wire Connection
C7 Analog Input/Output
6
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6.3 Analog Input Function
This section contains
SThe characteristics of the analog input module
SThe technical specifications of the analog input module
You will learn
SHow to start up the analog input module
SThe measuring ranges provided by the analog input module
SThe parameters you can use to influence the characteristics of the analog
input module.
The following measurement types are available on the analog input module:
SVoltage measurement
SCurrent measurement
The measuring ranges are:
SVoltage: 10 V
SCurrent: 20 mA, 4 to 20 mA
For the current range 4 to 20 mA, a current of < 1.6 mA is interpreted per
software as a wire break (see Volume 2, Section 5.2).
Measuring ranges for current measurement with 4-wire transducers:
S20 mA
S4 to 20 mA
Overview
Available
Measurement
Types
Measuring Ranges
Wire Break Check
Measuring Ranges
for 4-Wire
Transducers
C7 Analog Input/Output
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6.3.1 Characteristics and Technical Specifications of the Analog Input
Module
The analog input module has the following characteristics:
S4 inputs
SMeasured value resolution
– 12 bits including sign
SMeasurement type selectable:
– Voltage
– Current
SChoice of measuring range per input
SDiagnostics which can be assigned parameters
SAn interrupt which can be assigned parameters
SAn interrupt cycle which can be assigned parameters
SIsolated
Characteristics
C7 Analog Input/Output
6
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Figure 6-7 shows the terminal connection diagram of the analog inputs.
Pinout diagram
Voltage measurement
Analog inputs
Pin No.
AI1-U
AI1-I
AI1-M
AI2-U
AI2-I
AI2-M
AI3-U
AI3-I
AI3-M
AI4-U
AI4-I
2
1
3V
5
4
6V
8
7
9V
11
10
12 V
Current measurement
2
1
3
5
4
6
8
7
9
11
10
12
AI4-M
MANA
Parts with this shading are not relevant
to this example.
View of right-hand side of C7
Figure 6-7 Terminal Connection Diagram of the Analog Inputs
!Caution
The jumper between pins 1 + 2, 4 + 5, 7 + 8, 10 +11 must also be wired in
the case of current measurement.
Terminal
Connection
Diagram
C7 Analog Input/Output
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Three pins are combined to form a channel.
Table 6-1 Channels of the Analog Input Module
Pin No. Value Channel
AI1–U Voltage input Channel 1
AI1–I Current input (AI1)
AI1–M Reference potential
AI2–U Voltage input Channel 2
AI2–I Current input (AI2)
AI2–M Reference potential
AI3–U Voltage input Channel 3
AI3–I Current input (AI3)
AI3–M Reference potential
AI4–U Voltage input Channel 4
AI4–I Current input (AI4)
AI4–M Reference potential
Only one analog sensor can be connected to an analog input channel.
Voltage Measurement
Current
Voltage
Reference potential One channel voltage measurement
Figure 6-8 Connection of a Channel for Voltage Measurement
Current Measurement
When connecting a current measurement channel, the voltage pin and the
current pin are to be jumpered.
Current
Voltage
Reference potential One channel current measurement
Figure 6-9 Connection of a Channel for Current Measurement
Channels
Connection of an
Analog Input
C7 Analog Input/Output
6
6-13
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Figure 6-10 shows the block diagram of the analog input module. The input
resistances are 140 Ω / 125 mW. You will find detailed technical
specifications of the analog input module below.
Internal
supply
Logic
AI1
AI4
•
•
•
•
•
•
Galvanic
isolation
ADC
Figure 6-10 Block Diagram of the Analog Input Module
Technical Specifications
Specific Data of the Analog Input Function
Number of inputs 4
Cable length, shielded 200 m
Voltages, Currents, Potentials
Nominal load voltage L +
SPolarity reversal protection
24 VDC
Yes
Voltage supply to the
transducers
SShort circuit protection Yes
Galvanic isolation
(analog I/O to electronics) Yes
Permissible potential
difference
SBetween reference
potential of inputs and
MANA (VCM) if signal
= 0 V
SInsulation resistance
2.5 VDC
500 VDC
Analog Value Generation
Measurement principle Momentary value
SBasic conversion time 2.5 ms
SResolution in bit incl. sign
(incl. overrange) 12
STransition frequency
input filter 132 kHz
Measurement ranges:
Voltage
Current
V/A at different pins –>
no coding pin
–10...10 V
–20...20 mA, 4...20 mA
Measurement tolerance 1% of the end value
Block Diagram
C7 Analog Input/Output
6
6-14 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Interference Suppression, Error Limits
Interference voltage
suppression for f = n
(f1 " 1 %), (f1 = interference
frequencies)
SCommon mode
interference (VPP < 2.5 V)
SSeries-mode interference
(peak value of
interference < nominal
value of input range)
> 70 dB
> 40 dB
Cross-talk between the inputs
SAt 50 Hz
SAt 60 Hz
50 dB
50 dB
Basic error limit (operational
limit at 25 _C) 1%
Data for Selecting a Sensor
Input ranges (nominal values)
/ input resistance
SVoltage " 10 V; /100
kΩ
SCurrent " 20 mA;
4 to 20 mA; <250 Ω
<250 Ω
Permissible input voltage for
voltage input (destruction
limit)
18 V
Permissible input current for
current input (destruction
limit)
30 mA
Connection of signal sensors
Sfor voltage measurement
Sfor current measurement
as 4-wire transducer
Possible
Possible
Temperature compensation Balanced by
continuous on-line
calibration
Status, Interrupts, Diagnostics
Interrupts
SInterrupt cycle
SDiagnostic interrupt
Yes, can be assigned
parameters
Yes, can be assigned
parameters
Diagnostic functions
SDiagnostic information can
be read
Yes, can be assigned
parameters
Yes
Time intervals Yes, can be assigned
parameters
Wire break detection Can be assigned
parameters (using
software) at measuring
range 4 to 20 mA
C7 Analog Input/Output
6
6-15
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
6.4 Analog Output Function
This section contains
SThe characteristics of the analog output function
SThe technical specifications of the analog output function
You will learn
SHow to start up the analog output function
SThe various ranges of the analog output function
SThe parameters you can use to influence the characteristics of the analog
output function
SThe technical specifications of the analog output function.
The output function has the following characteristics:
S1 output
SThe output can be selected either as
– Voltage output or
– Current output
SResolution 12 bits including sign
SDiagnostics which can be assigned parameters
SIsolated
Note
If you modify the output ranges during operation of the analog output
function, intermediate values can arise at the output!
Overview
Characteristics
C7 Analog Input/Output
6
6-16 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Figure 6-11 shows the terminal connection diagram of the analog output
function.
Terminal
connection
diagram
Current outputVoltage output
Analog output
Pin No.
1
2
3
4
5
6
7
8
9
10
11
AO-U
AO-I
AO-M
15
14
16 VA
Parts with this shading are not relevant
to this example.
View of right-hand side of C7
Figure 6-11 Terminal Connection Diagram of the Analog Output Function
Figure 6-12 shows the block diagram of the analog output module. You will
find detailed technical specifications of the analog output module on the
following pages.
Terminal
Connection
Diagram
Block Diagram
C7 Analog Input/Output
6
6-17
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Block diagram
DAC
AO1
Galvanic
isolation
Figure 6-12 Block Diagram of the Analog Output Function
Technical Specifications
Specific Data of the Analog Output
Number of outputs 1
Cable length, shielded 200 m
Voltages, Currents, Potentials
Galvanic isolation Yes
Insulation resistance 500 VDC
Measurement ranges:
Voltage
Current
V/A at different pins –>
no coding pin
10 V
20 mA, 4...20 mA
Analog Value Generation
Resolution (including
overrange)
S10 V; 20 mA;
4 to 20 mA 12 bits incl. sign
Conversion time max. 0.8 ms
Settling time
SFor resistive load
SFor capacitive load
SFor inductive load
0.1 ms
3.3 ms
0.5 ms
Substitute value injectable Yes, can be assigned
parameters
Interference Suppression, Error Limits
Measuring tolerance 1% of end value
Basic error limit (operational
limit at 25 _C, referred to
output range)
SVoltage
SCurrent 1%
1%
Output ripple (referred to
output range) 0.05 %
Status, Interrupts, Diagnostics
Interrupts
SDiagnostic interrupt Yes, can be assigned
parameters
Diagnostic functions
SDiagnostic information can
be read
Yes, can be assigned
parameters
Yes, group error/fault
C7 Analog Input/Output
6
6-18 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Data for Selecting an Actuator
Output ranges
(nominal values) 10 V
20 mA
from 4 to 20 mA
Load resistance
SAt voltage outputs
SAt current outputs
SCapacitive Load
SInductive Load
min. 2 k
max. 500
max. 1 F
max. 1 mH
Voltage output
SShort-circuit protection
SShort-circuit current
Yes (countervoltage-
proof)
max. 25 mA
Current output
SIdle voltage min.15 V
Connection of actuators
SFor voltage output
2-wire connection
SFor current output
2-wire connection
Possible
Possible
Supply of sensors External (not via C7)
C7 Analog Input/Output
7-1
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Universal Inputs
This chapter describes the technical specifications and characteristics of the
universal inputs for the C7.
Universal Inputs
7
7
7-2 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
The C7 has four digital universal inputs that provide the following
functionality:
SInterrupt input
SCounter input
SFrequency/period duration counter input
SDigital input
These input functions can be set by assigning them parameters.
Figure 7-1 shows the pin assignments of the universal inputs.
1
2
3
4
5
6
7
8
9
10
11
12
Universal inputs
Not assigned
DI–X1
Ground
DI–X2
DI–X3
DI–X4
Parts with this shading
are not relevant to this
example.
View of right-hand side of C7
Figure 7-1 Pin Assignments of the Universal Inputs
Overview
Terminal
Connection
Diagram
Universal Inputs
7
7-3
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
The pin assignments of the universal inputs are as follows:
Table 7-1 Assignments of the Universal Inputs
Pin No. Function
MRelevant ground
DI–X1 Universal input 1 ( interrupt input, digital input, or counter input)
DI–X2 Universal input 2 ( interrupt input, digital input, or counter input)
DI–X3 Universal input 3 (interrupt input, digital input, counter input, frequency
counter input or period duration counter input)
DI–X4 Universal input 4 ( interrupt or digital input)
Not connected
Not connected
Not connected
The universal inputs are set with the software. This is done using the STEP 7
application Hardware Configuration. You use this application to determine
which function the individual input is to execute (see Table 7-1).
If this function is set, the input responds like a normal interrupt input, that is,
a hardware interrupt is triggered in the C7 CPU as a response to the edge
with assigned parameters.
If this function is set, the input responds like a normal digital input (see
Section 5.2). The only difference here is that the current process signal is not
automatically fed to the control program but must first be read in from the
I/O.
These universal inputs enable you to capture counter pulses up to a frequency
of 10 kHz. The counter can count either up or down.
This enables you to count pulses within a programmed length of time. From
this you can calculate a frequency 10 kHz.
This function enables you to count fixed timer ticks between two equal
edges. From this you can calculate the duration of an interval period.
Pin Assignments
of the Universal
Inputs
Assigning
Parameters to the
Inputs
Interrupt Input
Digital Input
Counter Input
Frequency
Counter
Period Duration
Counter
Universal Inputs
7
7-4 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Technical Specifications of the Universal Inputs
Specific Data of the Universal Inputs
Number of inputs 4
Cable length, shielded 1000 m
unshielded 600 m
Voltages, Currents, Potentials
Nominal load voltage L + 24 VDC
Number of simultaneously
energizable inputs 4
Galvanic isolation No
Function, Interrupts, Diagnostics
Interrupts
Counter functions
Max. counter frequency
Counters
SPrinciple
SCounter range
SLimit value (setpoint)
specification
SCounter interrupt of up
counter
SCounter interrupt of down
counter
SEnable
Period Duration Counter
SPrinciple
SCounter range
SMax. period duration
Frequency Counter
SPrinciple
SCounter range
SGate width
SMax. frequency
Can be assigned
parameters
Can be assigned
parameters
10 kHz
Module standard
diagnostics in
conjunction with
analog I/O. No
channel-specific
diagnostics
Max. 3
Edge counting
up 0 to 65535
down 65535 to 0
1 value per counter
When limit value is
reached
When “0” is reached
In the program
Max. 1
Counting between
fixed time units from
two positive edges
0 to 16777215
8.395 s or 0.119 Hz
Max. 1
Counting of pulses
within a time period
0 to 16777215
0, 1s, 10s (can be set)
10 kHz; limited by
input filter
Data for Selecting a Sensor
Input voltage
SNominal voltage
SFor “1” signal
SFor “0” signal
24 VDC
from 11 to 30 V
from –3 to 5 V
Input current
SAt “1” signal from 2 to 8 mA
Input delay time
SProgrammable
SAt “0” to “1”
SAt “1” to “0”
No
approx. 0.01 ms
approx. 0.01 ms
Input characteristic In accordance with
IEC 1131, Part 2
Type of input in accordance
with IEC 1131 Type 2
Input current
SAt “1” signal From 6 to 11.5 mA
Universal Inputs
8
8-2 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
8.1 Changing and Disposing of the Back-Up Battery
You must always change the back-up battery during power on. This prevents
any data loss in the internal user memory while changing the battery.
Note
The data in the internal user memory will be lost if you change the back-up
battery during power off!
Change the back-up battery during power on only.
Proceed as follows to change the back-up battery:
Step Action
1. Unscrew the cover of the C7 battery compartment (see Figure 8-1).
2. Lift the cover up and to the right (see Figure 8-2). Make sure you raise the
cover only as far as the battery connections allow.
3. Remove the battery connector of the old back-up battery.
4. Loosen the cable binders with which the back-up battery is attached to the
cover (see Figure 8-3).
5. Attach the new back-up battery with the cable binders to the cover.
6. Plug the battery connector of the new back-up battery into the relevant
socket in the battery compartment of the C7. The notch on the battery
connector must point to the left (see Figure 8-3).
7. Close the battery cover with the springs to the left onto the C7 and screw the
cover tight again.
Note
Do not touch any interior components of the C7 with your hands or a metal
part (screwdriver). Electrical components and printed circuit boards are not
sufficiently protected for this purpose. Please observe ESD guidelines.
Change During
Power On Only
Changing the
Back-Up Battery in
the C7
Maintenance
8
8-3
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Battery cover
Cable binder
Figure 8-1 Battery Cover Before Opening
Figure 8-2 Battery Cover
Maintenance
8
8-4 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Figure 8-3 Inserting the Back-Up Battery
We recommend that you change the battery every year.
Please observe national regulations/guidelines concerning the disposal of
back-up batteries.
Store back-up batteries in a cool, dry place.
Back-up batteries can be stored for up to five years.
!Warning
Back-up batteries can ignite or explode and constitute a serious fire hazard if
they are heated or damaged!
Store back-up batteries in a cool, dry place.
How Often Should
You Change the
Battery?
Disposal
Storage of
Back-Up Batteries
Maintenance
8
8-5
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
To prevent hazards when using back-up batteries, you must observe the
following rules:
!Warning
The use of back-up batteries may result in injury and damage.
Wrongly handled back-up batteries can explode or cause serious burns.
Do not
Srecharge
Sheat
Sburn
Sdrill
Scrush
Sshort-circuit
back-up batteries.
Rules for Handling
and Using
Back-Up Batteries
Maintenance
8
8-6 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
8.2 Replacing the C7
On-site repair of the C7 has not been provided for. For this reason, a
defective C7 must be replaced.
The following prerequisites must be met for replacing a C7:
Hardware
SProgramming device/PC with MPI interface module
SPG/PC cable or PC/MPI cable
Development tools
SSTEP 7
SProTool
User software (stored outside the C7)
SUser configuration
SUser control program (if data from the C7 CPU can no longer be read).
Proceed as follows:
SMechanical removal takes place in the opposite order to the installation.
SConnect a programming device/PC to the MPI.
SUse STEP 7 to transfer the user program stored in the C7 CPU to a
programming device/PC.
If the C7 CPU is defective and the user program can no longer be
displayed, remove the C7 without any further safety measures.
SThe configuration loaded onto the C7 cannot be displayed. It must be
available on a programming device/PC.
As soon as you have a new C7, install it as follows:
1. The mechanical and electrical installation is as described in the manual.
2. Connect a programming device/PC to the MPI.
3. Perform a memory reset of the C7 as described.
4. Transfer the previously saved user program from the programming
device/PC with the relevant data to the C7 CPU (using STEP 7).
5. Load your configuration with ProTool into the C7.
6. Start the user program.
Introduction
Prerequisite
Removal
Installation
Maintenance
A-1
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
General Technical Specifications
This chapter lists the general technical specifications of the C7.
These general technical specifications contain the standards and test values
that the C7 conforms to, or the criteria against which the C7 has been tested.
In Section You Will Find On Page
A.1 Technical Specifications A-2
A.2 Notes on the CE Marking A-5
A.3 Notes for the Machine Manufacturer A-6
A.4 T ransport and Storage Conditions for Back-Up
Batteries A-7
What Are General
Technical
Specifications?
Summary of
Sections
A
A
A-2 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
A.1 Technical Specifications
The table contains the technical specifications of the overall unit. The data
for the I/O can be found in the relevant chapters.
Table A-1 Technical Specifications of the C7
Criterion Technical Specifications
C7-626 C7-626 DP
Order number C7-626 : 6ES7626-1AG00-0AE3
C7-626 DP : 6ES7626-2AG00-0AE3
Dimensions: C7 mounting
dimensions 240 x 168 x 69 mm (H x W x D)
231 x 159 mm
Weight C7-626: 1350g
C7-626 DP: 1390g
C7-626, C7-626 DP display FSTN display, graphics capacity, 360 x 240 Pixel, CCFL back-lighting
Keyboard Membrane keyboard with metal domes, 48 keys, 28 integrated LEDs
Serial interface V.24 (printer)
Multipoint interface Standard MPI
Back-up battery Back-up time approx. 1 year
C7 OP
Flash memory
(configuration memory) C7-626: 128 Kbytes
Work memory 128 Kbytes
Power supply
Supply voltage (VCM)
SPolarized input voltage
connection
SVoltage interruption
(can be jumpered)
24V DC; (20.4 to 30.2V DC; safety extra-low voltage)
The C7-626 and C7-626 DP have no internal protection against high-energy
surge pulses in the µs range. For information on protection regulations, con-
sult the manual /70/, Chapter 4.
Yes
20ms
Current consumption (IN)1000 mA max.
Load current power supply
Supply voltage (VCM)
SInput voltage
Protected against polarity
reversal
24 VDC; (20.4...30 DC, 2V, safety extra-low voltage SELV)
The C7-626 and C7-626 DP have no integrated protection against
high-energy surge pulses in the µs range. For information on protection
regulations, consult the manual /70/, Chapter 4.
Yes
≥ 20 ms
General Technical Specifications
A
A-3
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Table A-1 Technical Specifications of the C7
Criterion Technical Specifications
Safety
Standardization DIN EN 61131-2 IEC 1131-2
Foreign bodies and water protection
SDevice front
SDevice housing
IP 65 to IEC 529
IP 20 to IEC 529
Electromagnetic compatibility (EMC)
Emitted interference
Limit value class B in accordance with EN 55022 CISPR 22
Conducted interference on AC
voltage supply lines ±2kV (in accordance with IEC 801-4/IEC 1000-4-4; burst)
±1kV (in accordance with IEC 801-5/IEC 1000-4-5; µs pulse / line to line)*
±2kV (in accordance with IEC 801-5/IEC 1000-4-5; µs pulse / line to
ground)*
* With protective element lightning conductor KT type AD 24 V from the
Dehn company.
Noise immunity on signal lines ±2kV (in accordance with IEC 801-4/IEC 1000-4-4; burst)
±1kV (in accordance with IEC 801-5/IEC 1000-4-5; µs pulse / line to line)*
±2kV (in accordance with IEC 801-5/IEC 1000-4-5; µs pulse / line to
ground)*
* With unshielded signal lines with protective element lightning conductor
KT type AD 24 V from the Dehn company.
Noise immunity against discharge ±6kV, discharge on contact (in accordance with IEC 801-2/IEC 1000-4-2;
ESD)
±8kV, atmospheric discharge (in accordance with IEC 801-2/IEC 1000-4-2;
ESD)
Immunity to high-frequency
radiation 10V/m with 80% amplitude modulation with 1 kHz,
10kHz-80MHz (in accordance with EN 50 141)
10V/m with 80% amplitude modulation with 1 kHz,
80kHz-1GHz (in accordance with EN 50 140)
10V/m, pulse-modulated, 50 % c.d.f. with 900 MHz (to EN 50 140)
Climatic conditions
Temperature
Operating
Non-operating
Tested in accordance with DIN IEC 68-2-1, DIN IEC 68-2-2
± 0°C to +45°C for horizontal installation
± 0°C to +50°C for vertical installation
Note:
With forced air ventilation, a maximum of 45°C can be obtained
if installed horizontally.
–20°C to +70°C
Relative humidity
Operating
Non-operating
Tested in accordance with DIN IEC 68-2-3
5% to 95% at 25°C (no condensation)
5% to 95% at 25°C (no condensation)
Atmospheric pressure
Operating
Non-operating 1080–795 hPa ( –1000m to +2000 m)
1080–660 hPa ( –1000m to +3500 m)
General Technical Specifications
A
A-4 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Table A-1 Technical Specifications of the C7
Criterion Technical Specifications
Mechanical environmental conditions
Vibration Operating
Non-operating
Tested in accordance with DIN IEC 68-2-6
10 to 58 Hz, amplitude 0.075 mm
58 to 500 Hz, acceleration 9.8 m/s2
5 to 9 Hz, amplitude 3.5 mm
9 to 500 Hz, acceleration 9.8 m/s2
Shock Operating
Non-operating
Tested in accordance with DIN IEC 68-2-29
Semi-sinusoidal: 100 m/s2 (10 g), 16 ms, 100 shocks
250 m/s2 (25 g), 6 ms, 1000 shocks
The entire 24 VDC power supply for the C7-626 and C7-626 DP (operating
voltage, load voltage, relay power supply, etc.) must be provided in the form of
safety extra-low voltage (SELV).
!Warning
Personal injury and damage to property can occur.
If you do not provide the correct 24 VDC power supply for your C7-626 or
C7-626 DP, this may result in damage to components of your programmable
controller and personal injury.
Use only safety extra-low voltage (SELV) for the 24 VDC power supply to your
C7-626 or C7-626 DP.
The following markings are used to show the relevant approval:
Underwriters Laboratories (UL) to UL 508 standard
UL recognition mark
Canadian Standard Association (CSA) to standard C 22.2. No 142
FM
APPROVED
FM Standards No. 3611, 3600, 3810 APPROVED for use in
Class I, Division 2, Group A, B, C, D indoor hazardous
locations.
24 V DC Power
Supply
Relevant for the
U.S.A. and Canada
General Technical Specifications
A
A-5
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
A.2 Notes on the CE Marking
Products bearing the CE marking meet the requirements of the EU directive
89/336/EEC on “Electromagnetic Compatibility”.
In accordance with the above-mentioned EU directive, Article 10 (1), the EU
declarations of conformity and the relevant documentation are held at the
disposal of the competent authorities at the address below:
Siemens Aktiengesellschaft
Bereich Automatisierungstechnik
AUT E 14
Postfach 1963
D-92209 Amberg
Federal Republic of Germany
The C7-626 and C7-626 DP control systems have been designed for use in
the following areas in accordance with their CE marking:
Area of Application Requirements:
Emitted Interference Immunity
Industrial and office area EN 50081-2: 1993 EN 50082-2: 1995
Household, business and trade
area, small plants EN 50081-1: 1992 EN 50082-1: 1992
The installation guidelines and safety instructions described in the manual must
be observed when installing and operating the device.
EC EMC Directive
89/336/EEC
Area of
Application
Observing the
Installation
Guidelines
General Technical Specifications
A
A-6 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
A.3 Notes for the Machine Manufacturer
The SIMATIC programmable controller system is not a machine as defined in
the EU Machinery Directive. There is therefore no declaration of conformity
for SIMATIC with regard to the EU Machinery Directive 89/392/EEC.
The EU Machinery Directive 89/392/EEC regulates requirements relating to
machinery. A machine is defined here as an assembly of linked parts or
components (see also EN 292-1, Paragraph 3.1).
SIMATIC is part of the electrical equipment of a machine and must therefore be
included by the machine manufacturer in the declaration of conformity
procedure.
The EN 60204-1 standard (Safety of Machinery, Electrical Equipment of
Machines, Part 1, Specification for General Requirements) applies for electrical
equipment of machinery.
The table below is designed to help you with the declaration of conformity and
to show which criteria apply to SIMATIC according to EN 60204-1 (as of June
1993).
EN 60204-1 Subject/Criterion Remarks
Paragraph 4 General requirements Requirements are met if the devices are mounted/installed in
accordance with the installation guidelines.
Please observe the explanations on the previous pages.
Paragraph 11.2 Digital input/output
interfaces Requirements are met.
Paragraph 12.3 Programmable equipment Requirements are met if the devices for protection of memory
contents against change by unauthorized persons are installed in
locked cabinets.
Paragraph 20.4 Voltage tests Requirements are met.
Introduction
EU Machinery
Directive
89/392/EEC
Electrical
Equipment of
Machinery in
Accordance with
EN 60204
General Technical Specifications
A
A-7
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
A.4 Transport and Storage Conditions for Back-Up Batteries
Transport back-up batteries where possible in their original packaging.
Observe the regulations for the transport of dangerous goods and substances.
The back-up battery contains approximately 0.25 g of lithium.
Note: According to air freight transport regulations, the back-up battery is in
Hazardous Goods Class 9.
Store back-up batteries in a cool, dry place.
Back-up batteries can be stored for up to 5 years.
!Warning
Back-up batteries can ignite or explode and constitute a serious fire hazard if
they are heated or damaged!
Store back-up batteries in a cool, dry place.
To prevent hazards when using back-up batteries, you must observe the
following rules:
Do not
Srecharge
Sheat
Sburn
Sdrill
Scrush
Sshort-circuit
back-up batteries.
Transport of
Back-Up Batteries
Storage of
Back-Up Batteries
Rules for Handling
and Using
Back-Up Batteries
General Technical Specifications
A
A-8 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
General Technical Specifications
B-1
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Guidelines for Handling Electrostatically
Sensitive Devices (ESD)
In Section You Will Find On Page
B.1 What is ESD? B-2
B.2 Electrostatic Charging of Objects and Persons B-3
B.3 General Protective Measures Against Electrostatic
Dischar ge Damage B-4
B.4 Taking Measurements and Working on
ESD Modules B-6
B.5 Packing Electrostatically Sensitive Devices B-6
Summary of
Sections
B
B
B-2 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
B.1 What is ESD?
All electronic modules are equipped with large-scale integrated ICs or
components. Due to their design, these electronic elements are very sensitive
to overvoltages and thus to any electrostatic discharge.
These Electrostatically Sensitive Devices are commonly referred to by the
abbreviation ESD.
Electrostatically sensitive devices are labelled with the following symbol:
!Caution
Electrostatically sensitive devices are subject to voltages that are far below
the voltage values that can still be perceived by human beings. These
voltages are present if you touch a component or module without previously
being electrostatically discharged. In most cases, the damage caused by an
overvoltage is not immediately noticeable and results in total damage only
after a prolonged period of operation.
Definition
Guidelines for Handlin
g
Electrostaticall
y
Sensitive Devices
B
B-3
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
B.2 Electrostatic Charging of Objects and Persons
Any object with no conductive connection to the electrical potential of its
surroundings can be charged electrostatically. In this way, voltages up to
15 000 V can build up whereas minor charges; that is, up to 100 V, are not
relevant.
Examples:
SPlastic covers up to 5 000 V
SPlastic cups up to 5 000 V
SPlastic-bound books and notebooks up to 8 000 V
SDesoldering device with plastic parts up to 8 000 V
SWalking on plastic flooring up to 12 000 V
SSitting on a padded chair up to 15 000 V
SWalking on a carpet (synthetic) up to 15 000 V
An electrostatic discharge is
Sperceptible from 3500 V
Saudible from 4500 V
Svisible from 5000 V
A fraction of these voltages is capable of destroying or damaging electronic
devices.
Carefully note and apply the protective measures described below to protect
and prolong the life of your modules and components.
Electrostatic
Charging
Limits for
Perceiving
Electrostatic
Discharges
Guidelines for Handlin
g
Electrostaticall
y
Sensitive Devices
B
B-4 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
B.3 General Protective Measures Against Electrostatic Discharge
Damage
Keep plastics away from sensitive devices. Most plastic materials have a
tendency to build up electrostatic charges easily.
Make sure that the personnel, working surfaces and packaging are
sufficiently grounded when handling electrostatically sensitive devices.
If possible, avoid any contact with electrostatically sensitive devices. Hold
modules without touching the pins of components or printed conductors. In
this way, the discharged energy cannot af fect the sensitive devices.
Note the following measures that have to be taken for modules that are not
protected against accidental contact:
STouch electrostatically sensitive devices only
– if you wear a wristband complying with ESD specifications or
– if you use special ESD footwear or ground straps when walking on an
ESD floor.
SPersons working on electronic devices should first discharge their bodies
by touching grounded metallic parts (for example, bare metal parts of
switchgear cabinets, water pipes, etc.).
SProtect the modules against contact with chargeable and highly insulating
materials, such as plastic foils, insulating table tops or clothes made of
plastic fibers.
SPlace electrostatically sensitive devices only on conductive surfaces:
– Tables with ESD surface
– Conductive ESD foam plastic (ESD foam plastic is mostly colored
black)
– ESD bags
SAvoid direct contact of electrostatically sensitive devices with visual
display units, monitors or TV sets (minimum distance to screen > 10 cm).
Keep Plastics
Away
Provide Sufficient
Grounding
Avoid any Contact
Additional
Precautions for
Modules without
Housing
Guidelines for Handlin
g
Electrostaticall
y
Sensitive Devices
B
B-5
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
The following figure again illustrates the precautions for handling
electrostatically sensitive devices.
a Conductive flooring material
b Table with conductive, grounded surface
c ESD footwear
d ESD smock
e Grounded ESD wristband
f Ground connection of
switchgear cabinet
g Grounded chair
a
b
c
d
e
f
g
ESD Precautions
Guidelines for Handlin
g
Electrostaticall
y
Sensitive Devices
B
B-6 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
B.4 Taking Measurements and Working on ESD Modules
Measurements may be taken on electrostatically sensitive devices only if
Sthe measuring device is grounded (for example via protective conductor)
or
Sthe tip of the isolated measuring device has previously been discharged
(for example, by briefly touching grounded metal parts).
B.5 Packing Electrostatically Sensitive Devices
Generally use conductive materials for packing modules without casing and
components. You may also use metal-clad plastic boxes or metal containers.
Always store ESD modules in conductive packing material.
When packing modules incorporating batteries, cover the battery connections
with insulating tape or insulating material to avoid short-circuiting of the
battery. Remove the battery if possible.
Use Grounded
Measuring Devices
Only
Using Conductive
Material for
Packing Modules
without Casing
Cover Batteries
Guidelines for Handlin
g
Electrostaticall
y
Sensitive Devices
Glossary-1
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Glossary
A
The analog I/O converts analog process values (for example, temperature)
into digital values that can be processed by the C7 CPU or converts digital
values into analog manipulated variables.
Assigning parameters means setting the operating characteristics of a
module.
An automation system is a programmable logic controller in the
SIMATIC S7 range.
B
The back-up battery guarantees that the user program in the C7 CPU is
stored safe from power failures and that data areas, bit memory, timers and
counters remain retentive.
The back-up memory backs up memory areas of the C7-620 without the
need for a back-up battery. The memory backs up a programmable number of
timers, counters, bit memory and data bytes, the retentive timers,
counters, bit memory and data bytes.
A bus is a transfer medium that connects two or more nodes with each other.
Data transfer can be serial or parallel, via electrical conductors or fiber optic
cable.
C
The C7-620 control system integrates an S7-300 CPU, a COROS OP, the I/O
and an IM 360 interface module in one single unit.
Analog I/O
Assigning
Parameters
Automation
System
Back-Up Battery
Back-Up Memory
Bus
C7-620
Glossary-2 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
The C7 CPU is a central processing unit of the C7 range, complete with
processor, arithmetic unit, memory, operating system and interfaces for
programming devices. The C7 CPU is independent of the ³ C7 OP. The
C7 CPU has its own MPI address and is connected to the C7 OP via the MPI
(multipoint interface).
The C7 I/O (³ signal module) forms the interface between the process and
the programmable controller. There are digital input and outputs as well as
analog inputs and outputs. The integral universal inputs have special
functions in the C7 (interrupt/counter inputs).
The C7 OP handles the OP functions of the C7 control system. It is
independent of the ³ C7 CPU and continues to operate, for example, if the
C7 CPU enters the STOP mode. The C7 OP has its own MPI address and is
connected to the C7 CPU via this interface. It is via the MPI that the C7 OP
is connected to a configuring computer (programming device/PC).
³ Communications Processor
Communications processors are intelligent modules with their own processor.
They form an important group within the components of a programmable
controller. A distinction can be made between various types of
communications processors according to their tasks. For example, CPs for
messages and logging, for point-to-point connection, for operator interfacing
(COROS), for bus connections (SINEC), for diagnostics and mass storage
applications.
When a CPU starts up (for example, when the mode selector is moved from
STOP to RUN or when power is turned on), before cyclic program processing
starts (OB1), the organization block OB100 (complete restart) is processed
first. In a complete restart, the process-image input table is read in and the
STEP 7 user program processed starting with the first statement in OB1.
The assignment of modules to racks/slots and addresses (for example, signal
modules).
The configuration memory is a flash memory integrated in the C7 OP. It is
used for storing the configuration data.
A cyclic interrupt is generated periodically by the C7 CPU according to a
time grid which can be assigned parameters. It triggers execution of the
relevant organization block.
C7 CPU
C7 I/O
C7 OP
CP
Communications
Processor (CP)
Complete Restart
Configuration
Configuration
Memory
Cyclic Interrupt
Glossary
Glossary-3
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
D
Diagnostic Functions, System Diagnostics
The diagnostic buffer is a buffered memory area in the C7 CPU in which
diagnostic events are stored in order of occurrence.
Diagnostic events include errors in a digital function in the C7, system faults
in the C7 caused, for example, by programming errors or operating mode
transitions.
The diagnostic functions comprise the complete scope of system diagnostics
and the detection, evaluation and signaling of faults within the C7.
Modules with diagnostics capability signal system errors to the C7 CPU
by means of diagnostic interrupts.
E
Electrical connection (equipotential bonding conductor) that brings the
bodies of electrical resources to the same or approximately the same
potential as foreign conducting bodies in order to prevent interference or
hazardous voltages arising between the bodies.
The error display is one of the possible responses of the operating system to a
run-time error. The other possible responses are: error response in the user
program, STOP mode of the C7 CPU.
F
With regard to their characteristic to retain data in the case of a power
failure, FEPROMs correspond to the electrically erasable EEPROMs, but can
be erased much faster (FEPROM = Flash Erasable Programmable Read Only
Memory).
The following data can be held in flash memory without being affected by a
power failure:
SThe user program
SThe parameters that determine the characteristics of the C7 CPU
and the I/O functionality of the C7.
Diagnostics
Diagnostic Buffer
Diagnostic Events
Diagnostic
Functions
Diagnostic
Interrupt
Equipotential
Bonding
Error Display
Flash EPROM
Glossary
Glossary-4 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Flash EPROM
Grounding with the sole purpose of ensuring the intended purpose of the
electrical resources. Function grounding has the effect of short-circuiting
interference voltages that would otherwise have an impermissible influence
on the resources.
A function module is a module that offloads the CPU of the S7-300 and
S7-400 programmable controllers of time-critical or memory-intensive
process signal handling tasks. FMs generally use the internal bus for
high-speed data exchange with the CPU. Examples of FM applications
include counting, positioning, closed-loop control.
G
Conductive ground whose electrical potential at any point can be taken as
zero.
In the area of grounding electrodes, the ground can have a potential other
than zero. This is frequently referred to as the “reference ground”.
To connect an electrically conductive part with the grounding electrode (one
or more conductive parts that have very good contact to ground) by means of
a grounding point.
H
A hardware interrupt is triggered by interrupt-triggering modules as the result
of certain events in the process. The hardware interrupt is signaled to the C7
CPU. Depending on the priority of the interrupt, the corresponding
organization block is then executed.
I
The information functions of STEP 7 permit the display of status information
on the programming device via one or more C7 systems during the various
startup phases and during operation of a programmable controller.
Flash Memory
Function
Grounding
Function Module
(FM)
Ground
Ground (verb)
Hardware Interrupt
Information
Function
Glossary
Glossary-5
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
The operating system of the C7 CPU recognizes 10 different priority
classes governing execution of the user program. Interrupts such as hardware
interrupts belong to these priority classes. When an interrupt occurs, the
operating system automatically calls an assigned organization block in which
the user can program the desired response (for example, in an FB).
In isolated input/output modules, the reference potentials of the control
circuit and the load circuit are galvanically isolated by, for example,
optocouplers, relay contactors or transformers. Input/output circuits can be
connected to common potential.
L
The load memory is a component part of the C7 CPU. It contains objects
(load objects) created by the programming device. It is implemented as a
fixed integrated memory.
M
When clearing the C7 CPU, the following memories are deleted:
SThe work memory
SThe read/write memory area of the load memory
SThe system memory
SThe back-up memory
and the user program is reloaded from the flash memory.
When clearing the C7 OP, the following memories are deleted:
SThe work memory
SThe configuration memory
The C7 OP then does not contain a user configuration.
Multipoint Interface
A network is a connection of several C7s and/or S7-300s and further
terminals, such as a programming device, via a connecting cable. Data are
exchanged between the connected devices over the network.
Interrupt
Isolated
Load Memory
Memory Reset
MPI
MPI Network
Glossary
Glossary-6 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
The multipoint interface is the programming device interface in SIMATIC
S7. It allows a number of programmable modules, text display operator
panels, and operator panels to be accessed from a central unit. The nodes on
the MPI can communicate with each other. Each node is identified by an
address (MPI address).
N
The node number represents the “access address” of a C7 CPU, C7 OP or a
programming or other intelligent I/O module when it communicates with
other nodes via an MPI network. The node number is assigned to the
C7 CPU, C7 OP and programming device.
In non-isolated I/O modules, the reference potentials of the control circuit
and the load circuit are electrically connected.
O
The operating system of the C7 CPU organizes all functions and processes of
the C7 which are not linked to a special control task.
P
1. A parameter is a variable of a STEP 7 logic block
2. A variable for setting the behavior of a module
(one or more per module)
Every configurable module has a basic parameter setting when it is supplied
from the factory, but this can be changed using STEP 7.
There are two types of parameter: static and dynamic parameters.
( Parameters, Dynamic or Parameters, Static)
Dynamic parameters of modules, in contrast to static parameters, can be
changed by the user program during operation by calling an SFC; for
example, limit values of an analog signal input module.
Static parameters of modules, in contrast to dynamic parameters, cannot be
changed by the user program, but only using STEP 7; for example, the input
delay of a digital signal input module.
Multipoint
Interface (MPI)
Node Number
Non-Isolated
Operating System
of the C7 CPU
Parameters
Parameters,
Dynamic
Parameters,
Static
Glossary
Glossary-7
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Programming Device
Programmable Logic Controllers
The signal states of the digital inputs and outputs are stored in the C7 CPU in
a process image. A distinction can be made between the process-image input
table (PII) and the process-image output table (PIQ).
The process-image input table is read by the input modules before execution
of the user program.
The process-image output table is transferred to the output modules by the
operating system at the end of the user program.
Programmable logic controllers (PLCs) are electronic controllers whose
function is stored in the control device as a program. The setup and wiring of
the device are therefore not dependent on the function of the controller. A
programmable controller has the structure of a computer; it consists of a CPU
with memory, I/O modules, and an internal bus system. The I/O and the
programming language are set up according to the requirements of control
engineering.
Programming devices are essentially personal computers that are compact
and portable and suitable for industrial use. They are characterized by being
equipped with special hardware and software for SIMATIC programmable
controllers.
R
The Random Access Memory or RAM is a read/write memory in which each
memory location can be addressed individually and have its contents
changed. RAM is used as a memory for data and programs.
The reference ground is the total of all connected inactive parts of an
operating resource that cannot carry a hazardous touch voltage even in the
event of a fault.
Potential from which the voltages of the connected circuits are considered
and/or measured.
PG
PLC
Process Image
Programmable
Logic Controllers
Programming
Device
RAM
Reference Ground
Reference
Potential
Glossary
Glossary-8 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
S
The scan cycle time is the time required by the ³ C7 to execute the ³ user
program once.
Signal modules (C7 I/O) form the interface between the process and the C7.
There are digital input and output modules and analog input and output
modules.
Programming software for creating user programs for SIMATIC S7
programmable controllers.
A STEP 7 application is a tool of ³ STEP 7, which is tailored to a specific
task.
Substitute values are values which are output to the process in the case of
faulty signal output modules or which are used in the user program instead of
a process variable in the case of faulty signal input modules. The substitute
values can be specified in advance by the user (for example, maintain old
value).
System diagnostics comprises the recognition, evaluation and signalling of
errors which occur within the programmable controller. Examples of such
errors include: program errors or module failures. System errors can be
indicated via LEDs or via STEP 7.
The system memory is integrated in the CPU and executed in the form of
RAM. The address areas (for example, timers, counters, bit memory) and
data areas required internally by the ³ operating system (for example,
backup for communication) are stored in the system memory.
T
The time-of-day interrupt belongs to one of the priority classes in the
program execution of the C7 CPU. It is generated at a specific date (or day)
and time (for example, 9:50 or every hour or every minute). A corresponding
organization block is then executed.
The time-delay interrupt belongs to one of the priority classes in SIMATIC
S7 program execution. It is generated when a timer has expired in the user
program. A corresponding organization block is then executed.
Scan Cycle Time
Signal Module
STEP 7
STEP 7
Application
Substitute Value
System
Diagnostics
System Memory
Time-Delay
Interrupt
Time-Of-Day
Interrupt
Glossary
Glossary-9
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
³ STEP 7 Application
Sum of the currents of all output channels of a digital output module.
Data transmission rate (bit/s).
U
Without galvanic connection to ³ ground.
The user memory contains ³ logic blocks and ³ data blocks of the user
program. The user memory is integrated in the C7 CPU as flash memory. In
general, however, the user program is executed from the ³ work memory of
the C7 CPU.
The user program contains all the statements and declarations and the data
required for signal processing to control a plant or a process. The program is
linked to a programmable module (for example, C7 CPU, FM) and can be
structured in the form of smaller units (blocks).
V
Voltage-dependent resistor.
W
The work memory is a RAM in the ³ C7 620 which the processor accesses
while executing the program.
Tool
Total Current
Transmission Rate
Ungrounded
User Memory
User Program
Varistor
Work Memory
(RAM)
Glossary
Glossary-10 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Glossary
Index-1
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Index
Figures
24 VDC input, 2-14
368 connecting cable, 2-21
4-wire transducer
Connection, 6-5
Measuring ranges, 6-9
A
Accessories, 2-2
Actual configuration, 3-25
Address, 3-3
Analog input
Isolated, 6-2
Measuring ranges, 6-9
Analog input function, 6-9
Technical specifications, 6-13
Analog input module
Characteristics, 6-10
Technical specifications, 6-10
Terminal connection diagram, 6-1 1
Analog input module SM 331; AI 8, wire break
check, 6-9
Analog inputs/outputs, 2-12
Analog output function, 6-15
Technical specifications, 6-17
Terminal connection diagram, 6-16
Analog signal, cable for, 6-2, 6-6
Assembling bus cable, on PROFIBUS bus con-
nector, 3-19
Assigning parameters, to universal inputs, 7-3
AUX digital inputs, 2-12
B
Back-up battery
Changing, 8-2
Disposing of, 8-4
Storing, 8-4
Transport and storage conditions, A-7
BAF, 2-28
Battery fault, 2-28
Bus cable, 1-4
Length of spur lines, 3-13
Bus connector , 3-15
Installing PROFIBUS bus cable, 3-22
Mounting bus cable, 3-20
Purpose, 3-17
Removing, 3-24
Setting terminating resistance, 3-24
Terminating resistance, 3-7
To module, 3-24
Bus connectors, 2-15
Bus segment, 3-6
C
C7 Installation, 2-6
Performance range, 1-3
C7 Accessories, 2-2
C7 CPU, Clock, 2-22
C7 gap, 2-9
C7 OP, Clock, 2-22
Cabinet setup, 2-16
Cable, for analog signals, 6-2, 6-6
Cable length, maximum, 3-12
CE marking, A-5
Clock
C7 CPU, 2-22
Master, 2-22
OP section, 2-22
Communication, CPU to CPU, 3-4
Communications processors, 1-4
Components, for MPI network, 3-7, 3-15
Configuration Memory, Glossary-2
Connect PG/PC, for service purposes, 4-4
Connectable components, for C7, 1-3
Connectors, 2-19
Counter input, universal inputs, 7-2, 7-3
CPU to CPU communication, 3-4
Current measurement, 6-9
Current transducer, 6-2
Index-2 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
D
DI/DO 24 VDC power supply, 2-13
DI/DO status bits, 5-7
DI/DO status display, exiting, 5-8
Digital input, universal inputs, 7-2, 7-3
Digital input function, technical specifications,
5-3
Digital inputs, 2-10
Digital output function, 5-4
Digital outputs, 2-11
Special features, 5-4
DIN E 19245 T.3, 3-2
DP master, 3-25
F
Field devices, 3-2
Fixing bracket
Before engaging, 2-7
Inserting, 2-8
Flash Memory, Glossary-4
FRCE, 2-28
Frequency counter, universal inputs, 7-3
Frequency measurement, universal inputs, 7-2
Function keys, labeling, 2-4
Function modules, 1-4
Functional earth, 2-14
G
Gap, C7, 2-9
GD circle, 3-4
Grounding, 2-16
Grounding rail, 2-16
Installing, 2-18
Group error, CPU, 2-28
H
Hardware setup, interference-proof, 2-16
Highest MPI address, 3-3
I
IM360, 2-20
IM360 interface module, 2-20
IM361 cable, 2-2, 2-15
Installation, interference-proof, 2-16
Installing a C7, 2-6
Interface module, 1-3, 2-20
Interference signals, 2-16
Interference-proof installation, 2-16
Interrupt input, universal inputs, 7-2, 7-3
K
Keying connectors, 2-19
M
Master clock, 2-22
Measuring ranges
4-wire transducer, 6-9
Analog input, 6-9
Module time limits, 3-25
Modules, transport and storage conditions, A-7
Mounting bus cable, to bus connector 6ES7 ...,
3-20
MPI, 3-2
Pin assignments, 2-14
MPI address, 3-3
Highest, 3-3
Of FMs and CPs, 3-4
Of the C7, 3-3
Recommendation, 3-7
Rules, 3-4
MPI network
Components, 3-7, 3-15
Connecting a programming device, 4-2, 4-3
Data packets in, 3-4
Example for configuring, 3-9
Rules for configuring, 3-5
Segment, 3-12
Setup example, 3-11
N
Network components, 3-15
Nodes, 3-2
Number, 3-3
O
OP, 1-4
Operating system test, startup, 2-25
Index
Index-3
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
P
Performance range, C7, 1-3
Period duration counter, universal inputs, 7-2,
7-3
PG/PC, via spur line to MPI network, 4-5
Pin assignments, 2-10
Plug and socket connectors, view, 2-10
Printer, 1-4
Printer cable, 2-3
Printer connection, 2-10
PROFIBUS address, 3-3
Recommendation, 3-7
PROFIBUS bus cable, 2-15, 3-15
Assembling, 3-19
Characteristics, 3-15
Rules for cable laying, 3-16
To bus connector , 3-22
PROFIBUS bus connector, 3-18
PROFIBUS bus terminal, 2-15
PROFIBUS DP, 3-1, 3-2
Starting up, 3-25
PROFIBUS-DP network
Segment, 3-12
Setup example, 3-10, 3-11
Programming device, 1-5
Connection to an MPI network, 4-2, 4-3
In MPI network, 4-4
Programming device cable, 1-4, 2-15
R
Ready message, 2-25
Remote segment, 3-12, 3-14
Repeater, 3-3
RS 485 repeater, 1-5, 3-3, 3-15
Terminating resistance, 3-8
Using, 3-7
RUN, 2-28
Run-time meter, 2-23
S
S7-300 (CPU), 1-4
S7-400 (CPU), 1-4
Segment
MPI network, 3-12
PROFIBUS-DP network, 3-12
Self-test, 2-25, 3-1
Service programming device, 3-7
Setpoint configuration, 3-25
Setup guidelines, 2-16
SF, 2-28
Shield, 2-16
Shielding clips, 2-18
Signal modules, 1-3
SINEC L2-DP, 3-1
Spur lines, 3-5, 3-13
Length, 3-13
Starting up
CPU as DP master, 3-25
PROFIBUS DP, 3-25
Startup, 2-25, 3-25
Status bits, 5-7
DI/DO, 5-7
STOP, 2-28
Storage, of back-up batteries, 8-4
Surge impedance. Siehe Abschlußwiderstand
T
Technical specifications, dimensions, A-2
Terminating resistance, 3-6, 3-7
Example, 3-8
On bus connector, 3-7
On RS 485 repeater, 3-8
Set at the bus connector, 3-24
Transducer
Isolated, 6-3
Non-isolated, 6-3
T ransmission rate
DP, 3-2
MPI, 3-2
U
Universal inputs
Assigning parameters, 7-3
Pin assignments, 7-3
V
V24, 2-13
Voltage measurement, 6-9
Voltage transducer , 6-2
Connection, 6-5
W
Wire break check, analog input module SM 331;
AI 8, 6-9
Index
Index-4 C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
Index
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01 1
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5. Please rate the quality of the graphics/tables:
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