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A5E 33 5070 26-AB , 01 /2 015 1
SIMATIC
S7-1200
CM 1241 firmware update V2.0.3
Product Information
Description
The S7-1200 CM 1241 firmware update V2.0.3 provides general robustness impr ovement in the operational behavior of the
communication module CM 1241. The S7-1200 CM 1241 firmware update V2.0.3:
●Fixes compatibility issue V1.0 CPUs (both modules)
●Prevents missing the beginning characters of a response message (CM 1241 RS422/485 module)
●Prevents port lock-up during a receive buffer overflow condition (both modules)
Refer to the SIMATIC S7-1200 System Manual for more information about the S7-1200 product family.
Table 1 Communication modules affected by the CM 1241 firmware update V2.0.3
Communication module Description Order number
RS232 CM 1241 RS232 6ES7 241-1AH32-0 XB0
RS422/485 CM 1241 RS422/485 6ES7 241-1CH32-0XB0
Requi red user action
You can install the firmware update from either the Web server or by making a SIMATIC S7 memory card that contains the
firmware update. The S7-1200 Syst em Manual documents both methods.
CM 1241 firmware update V2.0.3
A5E 33 5070 26-AB , 01 /2 015
Siemens AG
Division Digital Factory
Postfach 48 48
90026 NÜRNBERG
