Technical FAQs

Ask a Question

What is SOF on an ATV32 and ATV320 drives?

What is fault code SOF on an ATV32?

Product Line:
Altivar 32, ATV32

All models


SOF is an overspeed fault typically caused by a load driving the motor to spin faster than the VFD is attempting to run it.

From the program manual:
Check the motor. gain and stability parameters
Add a braking resistor.
Check the size of the motor/drive/load.
Check the parameters settings for the FREQUENCY METER (F9F-) function if it is configured.
Was this helpful?
What can we do to improve the information ?