CP 154xSP-1
Operating Instructions, 12/2019, C79000-G8976-C426-05
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Program blocks
5
5.1
Program blocks for OUC
Program blocks for Open User Communication (OUC)
Connections of Open User Communication are not configured.
For TCP / UDP / ISO-on-TCP communication via Ethernet, the blocks of Open User
Communication (OUC) listed below are used. For this, create a suitable program blocks. You
will find details on the program blocks in the information system of STEP 7.
Note
Program block versions
Note that in STEP 7 you cannot use different versions of a program block in a station.
Program blocks
Together with the three CP types, the following OUC blocks with the specified minimum
version are available to the CPU:
●
TSEND_C V3.0 / TRCV_C V3.0
Compact blocks for:
–
Connection establishment/termination and sending data
–
Connection establishment/termination and receiving 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
●
TMAIL_C V4.0
Sending e-mails
To transfer encrypted e-mails with this block, the precise time of day is required on the
CP. Configure the time-of-day synchronization.