stallone
Member
Hi all,
i have a 1756-L62 processor, it keeps going into fault mode when i put it into run.
I went to check major faults and i see the program fault (type 04) (code 34) a timer instruction had a negative value for its PRE or ACC.
So from what i understand (basic PLC knowledge) it means the timer has a negative value, which it does, i reset it to 0 but when i place in run mode, it happens again immediately with the same value (-15200)
In the timer there is an expression, and i see the value coming from the machine set speed is -29, so this is where i think the negative value is coming from.
I think it happened today when i technician fixed something in the panel and moved the servo's, is it possible it needs to be set to 0 again somehow?
Also i clear this value but it immediately goes to -29 as i put the plc into run mode and the controller goes into fault and shows the same error as above.
Any guidance is welcomed, thank you.
i have a 1756-L62 processor, it keeps going into fault mode when i put it into run.
I went to check major faults and i see the program fault (type 04) (code 34) a timer instruction had a negative value for its PRE or ACC.
So from what i understand (basic PLC knowledge) it means the timer has a negative value, which it does, i reset it to 0 but when i place in run mode, it happens again immediately with the same value (-15200)
In the timer there is an expression, and i see the value coming from the machine set speed is -29, so this is where i think the negative value is coming from.
I think it happened today when i technician fixed something in the panel and moved the servo's, is it possible it needs to be set to 0 again somehow?
Also i clear this value but it immediately goes to -29 as i put the plc into run mode and the controller goes into fault and shows the same error as above.
Any guidance is welcomed, thank you.