What is a Foldback Alarm?

[travis]

What is a Foldback Alarm?

Looking for a general explanation of a foldback alarm.

[3rdshiftguy]

What is a Foldback Alarm?

Looking for a general explanation of a foldback alarm.

Foldback Alarm / Foldback Fault / Foldback Error or whatever you want to call it; it isn't actually an alarm in many cases. Foldback is designed into drives to protect them from overcurrent situations. When a foldback LED is lit on a drive it means that the foldback circuit has been activated due to current exceeding the rating of the drive.

When the drive senses to much current, it "folds back" some of it until the overcurrent situation has passed. It it never goes out, the overcurrent situation is still present.

Usually a drive will continue to operate during foldback, it is like a warning signal more than an alarm.