Communication
11.2 PROFINET
S7-1200 Programmable controller
842 System Manual, V4.2, 09/2016, A5E02486680-AK
The following scenarios are possible depending on the CONT parameter:
● CONT = "0":
An existing communications connection is established.
● CONT = "1" and a communications connection was established:
An existing communications connection is reset and established again.
● CONT = "1" and no communications connection was established.
No communications connection is established.
The COM_RST parameter is reset following evaluation by the instruction T_SEND. To
enable TSEND_C again after the execution (DONE = 1), call the instruction once with REQ =
0
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