Hello, I have a very simple project: PROGRAM PLC_PRG VAR T1: TON; START: BOOL; END_VAR AND IF NOT START THEN T1.PT:= T#1s; START:= TRUE; END_IF; T1.IN:= TRUE; The T1.ET does not change at all. I tried using a Wago and simulated the project. I hope someone can help. Cheers