Interface In The User Program; Call Interface For Open Communications Services Send/Recv; Open Tcp/Ip Communication - Siemens SIMATIC NET CP 442-1 RNA Equipment Manual

Configuration and operation

6.9 Interface in the user program

MIB files for your SNMP tools
If you use an SNMP tool, you will find the MIB files relevant to the CP in the STEP 7 installation
in the following folder:
<Drive>\<Installation folder>\Siemens\Step7\S7DATA\snmp\mib
There, you will find, for example, the following MIB files:
• automationPS.mib
• automationSmi.mib
• automationSystem.mib
• automationTC.mib
• IEC-62439-3-MIB.mib
6.9 Interface in the user program
6.9.1

Call interface for open communications services SEND/RECV

Change call parameters only after job confirmation
Note
Note the following for the call interface of the program blocks AG_SEND / AG_LSEND /
AG_SSEND or AG_RECV / AG_LRECV / AG_SRECV:
Once the job has been triggered, you can only make changes again after the program block
has confirmed completion of the job with DONE=1 or with ERROR=1.
If this is ignored, it is possible that the execution of the job will be aborted with an error and
resources could be permanently occupied on the CPU.
6.9.2

Open TCP/IP communication

Note
Validity
The information in this section applies only to the RNA interface.
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Equipment Manual, 03/2022, C79000-G8976-C318-05
CP 442-1 RNA