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What is the SOF fault on the Altivar Process Drive?

Issue:
What is the SOF (Overspeed) fault on the Altivar Process Drive?

Product Line:
Altivar Process Drive (ATV630, ATV930, ATV650, ATV950, ATV660, ATV960, ATV680, ATV980)

Environment:
All serial numbers for Altivar Process Drive

Cause:
N/A

Resolution:
Principle
This fault appears when an overspeed is present on the drive.

Probable Cause
  • Instability or driving load too high
Remedies
  • Check the motor, gain and stability parameters.
  • Check the size of the motor/inverter/load.
  • Add a braking resistor.
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