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Control 6 digital outputs (PLC) from a windows computer


Hi There!

I need to turn on-off a set of 6 digital outputs (relay is iok) from a custom designed PC windows program.

My client already has a S7 1200 PLC wired that has never used. This would be a good solution as he already has a UTP cable from his computer to where all these 6 machines are

Is it easy to interact from a Windows program with a S7 1200 PLC just to turn on-off these DO's in the PLC? Does it need to use OPC or can another simpler protocol be used?

If not, is there an easier solution? (Siemens Logo PLC's?)


Thanks a lot!