Communication processor and Modbus TCP
13.6 Legacy PtP communication (CM/CB 1241 only)
S7-1200 Programmable controller
1222 System Manual, V4.2, 09/2016, A5E02486680-AK
Table 13- 99 Data types for the parameters
REQ IN Bool Activate the configuration change on the rising edge of this input.
PORT IN PORT After you install and configure a CM or CB communication device,
the port identifier appears in the parameter helper drop-list available
at the PORT box connection. The assigned CM or CB port value is
the device configuration property "hardware identifier". The port sym-
bolic name is assigned in the "System constants" tab of the PLC tag
table. (Default value: 0)
CONDITIONS IN CONDITIONS The Conditions data structure specifies the starting and ending mes-
sage conditions as described below.
DONE OUT Bool TRUE for one scan, after the last request was completed with no
ERROR OUT Bool TRUE for one scan, after the last request was completed with an
Execution condition code (Default value: 0)
Start conditions for the RCV_PTP instruction
The RCV_PTP instruction uses the configuration specified by the RCV_CFG instruction to
determine the beginning and ending of point-to-point communication messages. The start of
a message is determined by the start conditions. The start of a message can be determined
by one or a combination of start conditions. If more than one start condition is specified, all
the conditions must be satisfied before the message is started.
See the topic "Configuring receive parameters (Page 1097)" for a description of the message
start conditions.
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