Siemens SIMATIC S7 System Manual page 226

PROFINET
7.4 PLC-to-PLC communication
From the Device configuration in STEP 7 Basic, you can configure how a TSEND_C
instruction transmits data. To begin, you insert the instruction into the program from the
"Communications" folder in the "Extended Instructions". The instruction is displayed, along
with the Call options dialog where you assign a DB for storing the parameters of the
TSEND_C instruction.
You can assign tag memory locations to the inputs and outputs, as shown in the following
figure.
Configuring General parameters
You specify the communication parameters in the Properties configuration dialog of the
TSEND_C instruction. This dialog appears near the bottom of the page whenever you have
selected any part of the TSEND_C instruction.
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S7-1200 Programmable controller
System Manual, 11/2009, A5E02486680-02