TwinCat and Siemens S7 Interface

We used that to interface both Allen Bradley over Ethernet/IP Protocol and then a custom protocol system using UDP Sockets.

Sure if you look at wireshark packet data then you would be able , with some skill, to wire code to socket to the Siemens, Have a look at the UPD example for TC2 on the beckhoff website or in the help somewhere.
 

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