An instance of this service interface function block type provides
two radio buttons for the user to enter a boolean
value represented as one of two states of a bistate device.
inputs provide labels for the
After initialization, the labels can be changed by the
service primitive. However, in this case the
state will remain unchanged.
An example of the use of an instance of this FB type can be found in
device of the
system configuration, where it is used to provide an ON/OFF switch
for the monitoring function.