545 Loop overrun alarm

[Tony Sikes 0]

We see a new alarm in our control room screen that states"TI 565 Loop Overrun Alarm" What does that mean? Should I be concerned?

[Ken Moore 23]

It means your processor cannot evaluate all the PID loops assigned, in the time allocated. So each scan so of you loops are not being updated. You should check the update time on you loops and try to make them slightly different, if your process allows. Do not make every loop 1.0 seconds, make one 1.1, another 1.2 etc...