The function block has a set of input and output signals. The placement of function block signals is from left to right. Input signals are placed on the left and output signals on the right.
Function blocks can contain more signals than needed in an application part. Unused signals can be hidden to get a clear picture.
Signals are located up and down on both sides of the middle position. When there is space left, some signals may be moved up or down for better visibility and connection routing.
Boolean input and output signals may need to be inverted to fulfil the logic. The Application Configuration tool supports the adding of inversion logic to a binary signal.
All input signals have a default value that is used when the signals are not connected in the configuration.