Saving data containing forced bit by the command «PLC/Save Data From PLC to file» save also the Forced state of these bit .
When these bit will be restored by the command «PLC/Restore Data From to file to PLC» they will be restored in Forced state.
Nevertheless the list of forced bit will not be restored and in final bit will be forced in the application without knowing easily which ones.
So it is strongly recommended to do not save data with forced bit in the application.
This behavior is always present in Unity Pro V11.1 it is planned to be fixed in a next version.
When these bit will be restored by the command «PLC/Restore Data From to file to PLC» they will be restored in Forced state.
Nevertheless the list of forced bit will not be restored and in final bit will be forced in the application without knowing easily which ones.
So it is strongly recommended to do not save data with forced bit in the application.
This behavior is always present in Unity Pro V11.1 it is planned to be fixed in a next version.