Communication processor and Modbus TCP
13.5 Modbus communication
S7-1200 Programmable controller
1192 System Manual, V4.2, 09/2016, A5E02486680-AK
Note
With version V4.1 of the S7
-1200, you can use the point-to-point instructions for all types of
-to-point communication: serial, serial over PROFINET, and serial over PROFIBUS.
STEP 7 provides the legacy point
-to-
point instructions only to support existing programs. The
legacy instructions still function, however, with V4.1 CPUs as well as V4.0 and earlier CPUs.
You do not have to convert prior programs from one set of instru
ctions to the other.
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