Configuring The Communication Module - Siemens S7-1200 System Manual
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- Operating instructions manual (132 pages) ,
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12.3.5.1
Configuring the communication module
You can configure the CM 1241 from the Device configuration in STEP 7 or with user
program instructions. This example uses the Device configuration method.
● Port configuration: Click the communication port of the CM module from the Device
● Transmit message configuration: Accept the default for transmit message configuration.
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
configuration, and configure the port as shown:
Note
The configuration settings for "Operating mode" and "Receive line initial state" are only
applicable for the CM 1241 (RS422/RS485) module. The other CM 1241 modules do not
have these port configuration settings. Refer to Configuring the RS422 and RS485
(Page 707).
No break is to be sent at message start.
Communication processor and Modbus TCP
12.3 Point-to-point (PtP) communication
705
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