FB_DECOUPLER

The FB_DECOUPLER function block is used to decouple signals from a TwinSAFE connection. The function block has 8 inputs and 8 outputs, whereby the inputs are looped through to the outputs one-to-one. The corresponding output must also be linked as soon as one of the inputs of the function block is used. This also applies in the reverse direction.

Because a TwinSAFE connection is always assigned to a POU (TwinSAFE group), the DECOUPLER function block can be used to distribute the signals of a TwinSAFE connection to multiple POUs (TwinSAFE groups) and therefore decouple them. The function block can be used within an existing POU (TwinSAFE group) to distribute the signals. The function block has to be used in a separate POU (TwinSAFE group) if the signals should also be decoupled, because all used outputs of a POU (TwinSAFE group) are switched off in the event of a communication error in the connection. The input signals of a TwinSAFE connection can now be linked to the inputs of the FB_DECOUPLER function block. The outputs can then be distributed to various POUs (TwinSAFE groups).

It works exactly the same way in the other direction. The outputs of a TwinSAFE connection are linked to the outputs of the FB_DECOUPLER function block, and the inputs of the FB_DECOUPLER function block can in turn come from different POUs (TwinSAFE groups).