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I need to monitor a small amount of data from an S7 CPU316-DP (~8 REAL's @ 2s rate) for loop tuning. The CPU has an MPI port and a Profibus port, and I would like to be able to make selected data from a DB available at a PC over DDE. I have used OPC via Ethernet on other
systems, but this one does not have the CP316 Ethernet module. Does anyone know if there is any software available to monitor data over the MPI link (like an Online Variable Table in the Step7 programming package, which we have)
but then making this available to other applications via DDE? I don't mind writing something if the details of the S7/MPI protocol are available, but I suspect this is not the case.
Many thanks for any information.
Hywel Thomas
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CONTROL SPECIALISTS LTD
Manchester, UK
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systems, but this one does not have the CP316 Ethernet module. Does anyone know if there is any software available to monitor data over the MPI link (like an Online Variable Table in the Step7 programming package, which we have)
but then making this available to other applications via DDE? I don't mind writing something if the details of the S7/MPI protocol are available, but I suspect this is not the case.
Many thanks for any information.
Hywel Thomas
_________________________________________________________
CONTROL SPECIALISTS LTD
Manchester, UK
_________________________________________________________