ERROR IN MODICON PLC

[Rishi1]

My machine is frequently stopping with error in the PLC

Error - Stop on software fault(task overrun or SFC overrun).

PLC model - TSX P573634

we did downloading of programme backup, but still issue is not solved.

Attaching below the backup and photos.

 

 

[hvalencia]

Did you fix this issue? I am having the same problem.

[Rishi1]

NO

[Rishi1]

ACtually which software do you use for this

[MatthewM]

Your attached images have not come through.

I suggest you contact your local tech support.

Unity/ECE or PL7?

Observe what the usual scan time is, and when it happens again what is getting up to (should be your task Watchdog time).

Is it a big program and are you setting %S94 to update Init values?  If the cycle time is already close to watchdog, this increases the scan for a moment while executing and can halt a CPU if it goes over watchdog.

Does your program have any WHERE or FOR loops of any kind that it might be able to get into and loop for long enough to reach the watchdog time?

Capture as much %SW and diag info and snips and share.