| Overload | Description | 
|---|---|
| FUNC_PLCISBUSCOUPLER | Bus coupler / head station # 20164. | 
| Overload | Description | 
|---|---|
| FUNC_PLCISBUSCOUPLER | Bus coupler / head station # 20164. | 
Identifies a device as a bus coupler or head station. In the case of a head station the Rack property has to be filled additionally for the respective PLC card.