IBHLink S7++:Beckhoff TwinCAT PLC with IBHLink S7++
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Data exchange between the TwinCAT PLC and a S7 controller via IBHLink S7++
The function blocks of the PLC library Tc2_S5S7Com can be used to realise data exchange between the local TwinCAT PLC and a S7 controller via IBHLink S7++.
A detailed description you'll find on the Beckhoff Information System.