Issue:
What causes an SoF [Overspeed Fault] on an ATV630, ATV930 or ATV340?

Product Line:
ATV630, ATV660, ATV680
ATV930, ATV960, ATV980
ATV340

Environment:
All serial numbers

Cause:
SOF during acceleration.

Resolution:
This fault can be caused by incorrect motor nameplate information in the drive, incorrect motor control settings for the application, or problems with the encoder feedback signal (ATV930/ATV340).
To resolve, go to the Main menu and Simply Start menu to ensure the motor nameplate information is correctly entered:
Nominal Motor power (nPr)
Nom Motor Voltage (unS)
Nom Motor Current (nCr)
Nominal motor Freq (FrS)
Nominal motor Speed (nSP)
If problem remains, goto Complete Settings (menu 5) / Motor parameters / Motor data and change Motor Param Choice to Mot Cosinus.  Then enter the Power Factor of the Motor in parameter Motor 1 Cosinus Phi.
Also under Motor Parameters try changing to a different Motor Control Type.  Selection may depend on the drive and the application, but common settings are U/V VC Standard or U/F VC 5pts.

If an Encoder is used, review the encoder wiring, programming and mechanical connection to the motor.􀁺 Instability or driving load too high.
􀁺 If a downstream contactor is used, the contacts between the motor and the drive have not been closed before applying a Run command
Remedy
􀁺 Verify the motor parameter settings.
􀁺 Verify the size of the motor/drive/load.
􀁺 Verify and close the contacts between the motor and the drive before applying a Run command.
Clearing the Error Code
This detected error requires a power reset.

Released for: Schneider Electric Saudi Arabia