IBHNet:Beckhoff TwinCAT PLC with IBHLink S5++/S7++/S7++HS
From IBHsoftec Wiki English
Data exchange between the TwinCAT PLC and a S5/S7 controller via IBHLink S5++ / 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 S5/S7 controller via IBHLink S5++ / IBHLink S7++.
A detailed description you'll find on the Beckhoff Information System.