What is the SOF (Overspeed) fault on the Altivar Process Drive?
Issue:
SOF fault on the Altivar Process Drive
Product Line:
Altivar Process Drive (ATV630, ATV930, ATV650, ATV950, ATV660, ATV960, ATV680, ATV980)
Resolution:
Principle
This fault appears when an overspeed is present on the drive.
Probable Cause
- Instability or driving load too high. Typically caused by a load driving the motor to spin faster than the drive is attempting to run it.
Remedies
- The motor may be turning when the drive gets a run command. Turn on Catch on the Fly
- In the Motor parameters menu (5 Complete Settings -> 5.2 Motor parameters):
- Try changing the [Dual rating] to Heavy Duty
- Try changing the [Motor control type] to U/F VC Standard (available on the ATV6xx)
- Check the motor, gain and stability parameters.
- Check the size of the motor/inverter/load.
- Add a braking resistor.
Note: We've seen a few instances where just changing the two parameters in the Motor parameters menu have corrected the issue. However, please be aware that changing the drive to heavy duty de-rates the drive by one HP class.
“If this article does not answer your question, check out our FAQ database that has answers to more commonly asked questions:
Frequently Asked Questions - Schneider Electric (se.com)
If this FAQ did not solve your issue, you can call us at 1-888-778-2733 Option 2 and then 4 or e-mail us at drive.products.support@se.com to create a case with our Technical Support Team.
Released for: Schneider Electric USA
