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I understand that it is not simple task of securing this information, but was interesting to be able to unite two matters: Development with micros and PLC. Thank you very much

In our University we have PLC Siemens CPU212 and you units EM235. But these stopped working. As we cannot buy new, ours first idea is if we can make our own units. It is for that reason that we needed to know as the bus of communications between the CPU and the EM235 works
Thanks

The protocol of the CPU 212 of communication with analogical unit EM235 is required?
Thanks