I was searching the net for info on the Siemens S7 MPI bus but didn't find anything really usefull.
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has some nice info, but it is not accurate enough to make my own driver software (although it should be possible by re-making 'nodave' a freeware MPI driver).
I want to make a driver in Delphi. I know of several commercial products, but I want to be able to distribute my software as freeware...
Thanks