I found the PLC logic behind the alarm “Foil not unwinding / foil torn” 🛠️
The alarm is defined in block 1_Errors_general.xml and mapped to Error_DB.Errors[5]. It is raised through the FC Error call with Kind = 3 and Area_nr = A1_main_DB.Area1.Nr. Source
The alarm fires when all of this holds at once:
I94B3 or I94B2PT = T#8s) Source