Cause : Motor 1 field exciter not okay comes when a fault was found during self-diagnosis of field exciter or power failure in field exciter 1.

F529 Motor 1 field exciter not okay fault in ABB DCS800 drive indicates a problem with the field exciter for Motor 1. The field exciter is a component that supplies DC current to the field winding of a DC motor, controlling its speed and torque.

1. Check the field exciter operation and change the field exciter.
2. Check the fault message at field exciter (7-segment display or flashing LED’s).