Siemens SIMATIC S7-1200 System Manual page 1222

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Table of Contents

Communication processor and Modbus TCP

13.6 Legacy PtP communication (CM/CB 1241 only)

Table 13- 99 Data types for the parameters

Parameter and type

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.

Activate the configuration change on the rising edge of this input.

(Default value: False)

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)

The Conditions data structure specifies the starting and ending mes-

sage conditions as described below.

TRUE for one scan, after the last request was completed with no

TRUE for one scan, after the last request was completed with an

Execution condition code (Default value: 0)

S7-1200 Programmable controller

System Manual, V4.2, 09/2016, A5E02486680-AK