Tobias Freyermuth and me worked on the system and as of last night, we found two new issues between Karabo and the PLC interlock:
 - one is a Karabo issue from the Interlock PLC interaction, the Karabo device waits for a PLC response that does not come when the PLC is interlocked (i.e. Karabo wants to open a valve but the PLC correctly refuses and ignores the command)

 - one is a PLC issue, the interlock is not triggered in all cases after testing (e.g. a ion pump out of set point does not closes a gate valve closure as specified).

The first one was reproduced with the BeckhoffSim simulation. It can therefore be fixed by CAS without dependencies from AE (except for the next integration test).