Code

Name

Causes

Possible Solutions

CoF

Current Offset Fault

The drive starts operation while the induced voltage stays in the motor (during coasting to a stop or after fast deceleration).

  • Make a sequence that does not restart operation when induced voltage stays in the motor.

  • Set b3-01 = 1 [Speed Search at Start Selection = Enabled].

  • Use Speed Search from Fmax or Fref [H1-xx = 61, 62] to do a speed search through one of the external terminals.

    Note:

    When controlling the PM motor, External Speed Search commands 1 and 2 operate the same.

A drive hardware problem occurred.

  • Do a Fault Reset to clear the fault or de-energize the drive.

  • If the fault stays, replace the drive.