Ladder line doesn't work

[guhl]

Hi
There is the problem on Tsugami NP32 with Fanuc 0TB.
One line of the ladder is not being performing, although all conditions are performed.
No COM and JMP instructions nearby.
No EEPROM error

[spark-el]

It is possible to write duplicate coils in Fanuc ladder. Search the coil to see if there are more than one, it sounds like your line of logic is turning the coil on, but something else is turning it off on the next scan. Search coil and check network number to see if there are more than one. Also check to make sure that ALL the contacts in that line of logic are staying TRUE constantly. They can be oscillating on and off, in which case they would appear to always be on (or highlighted) in the ladder.