Configuration and operation
6.8 Media redundancy
CP 443-1 Advanced
Equipment Manual, 03/2023, C79000-G8976-C256-07
67
Remedy
The IO device being used as a shared device will only take part in data exchange if the higher-
level I/O controllers are configured identically in terms of using routers.
You should therefore configure the PROFINET interfaces on the other IO controllers as
follows:
• The IP address of the PROFINET interface of the CP is used as the router address.
or
• The CP being used as the IO controller and all other IO controllers use the same IP address
as the router address.
6.8 Media redundancy
You can use the CP in a ring topology with media redundancy. The CP itself can be
redundancy manager.
For more detailed information on configuration, refer to the online help of the "Media
redundancy" parameter group and in Part A of the manual /2/ (Page 103).
If you are using IRT communication, no media redundancy is supported.
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 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.
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