The SOF [Motor Overspeed] fault condition appears when an overspeed is present on the drive.  Unstable or too large and overhauling load.

Resolution:
The threshold is 110% of the TFR parameter and during 250 ms in open or closed loop mode.
Check the motor parameters and the speed feedback loop if it applies.
Ensure that CLI [Current Limitation] is set higher than nCr [Nominal Motor Rated Current]
Adding a braking resistor.
Check the size of the motor, drive and or load.


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.

If you are not located in North America, please contact your local Customer Care Center for assistance:
Support | Schneider Electric Global (se.com)

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