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What is a SOF fault on an ATV312 drive?

Issue:
What is a SOF fault on an ATV312 drive?

Product Line:
Altivar 312

Environment:
All

Cause:
Instability.  Driving load too high.

Resolution:
Check the motor, gain, and stability.
Adding a breaking resistor if application requires it.
Check the size of the motor/drive/load.
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