Program Blocks; Program Blocks For Ouc - Siemens CP 1243-7 LTE Operating Instructions Manual

Program blocks

5.1

Program blocks for OUC

Using the program blocks for Open User Communication (OUC)
The instructions (program blocks) listed below are required for direct communication
between S7 stations via the mobile wireless network.
In contrast to other communication types, Open User Communication does not need to be
enabled in the configuration of the CP because corresponding program blocks need to be
created for this. You will find details on the program blocks in the information system of
STEP 7.
To receive data via program blocks, the CP requires a fixed IP address assigned by the
mobile wireless network provider.
Note
Different program block versions
Note that in STEP 7 you cannot use different versions of a program block in a station.
Supported program blocks for OUC
The following instructions in the specified minimum version are available for programming
Open User Communication:
● TSEND_C V3.0 / TRCV_C V3.0
Compact blocks for:
– Connection establishment / termination and sending data
– Connection establishment / termination and reception of data
As an alternative use:
● TCON V4.0 / TDISCON V2.1
Connection establishment / connection termination
● TUSEND V4.0 / TURCV V4.0
Sending and receiving data via UDP
● TSEND V4.0 / TRCV V4.0
– Sending and receiving data via TCP or ISOonTCP
– Sending and receiving SMS messages
CP 1243-7 LTE
Operating Instructions, 04/2017, C79000-G8976-C381-03
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