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Given Siemens dedication to Profibus, one would expect that the MPI protocol used to communicate with 300/400 series PLC's is based on the
profibus FMS transport.
None of the documentation I have either confirms or denies this proposition. I put the question to a local Siemens chap who said he does not know but it does not matter because all Siemens equipment can talk to each other using one protocol or another. Quite.
Well, suppose I had a 'generic' (i.e. non Siemens) profibus FMS device, could I do SEND/RECIEVE messaging with any 300/400 series PLC? Or the 200 series come to that, as they support MPI in addition to PPI.
Perhaps I am just being naive believing that 'a dedication to open protocol standards' means I can interconnect devices from different
manufacturers without expensive gateways;-)
profibus FMS transport.
None of the documentation I have either confirms or denies this proposition. I put the question to a local Siemens chap who said he does not know but it does not matter because all Siemens equipment can talk to each other using one protocol or another. Quite.
Well, suppose I had a 'generic' (i.e. non Siemens) profibus FMS device, could I do SEND/RECIEVE messaging with any 300/400 series PLC? Or the 200 series come to that, as they support MPI in addition to PPI.
Perhaps I am just being naive believing that 'a dedication to open protocol standards' means I can interconnect devices from different
manufacturers without expensive gateways;-)