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Communication processor and Modbus TCP
12.3 Point-to-point (PtP) communication
The order of checking start conditions is:
● Idle line
● Line break
● Characters or character sequences
While checking for multiple start conditions, if one of the conditions is not met, the CM or CB
will restart the checking with the first required condition. After the CM or CB establishes that
the start conditions have been met, it begins evaluating end conditions.
Sample configuration - start message on one of two character sequences
Consider the following start message condition configuration:
678
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
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