7391 Encoder 2 Fault in ABB ACS880 Drive - comes when faulty encoder cable or faulty encoder and encoder interface module is faulty.
Cause : Encoder 2 feedback fault - comes when faulty encoder cable or faulty encoder and encoder interface module is faulty.
If fault appears during first start-up before encoder feedback is used:
1. Check cable between encoder and encoder interface module (FEN-xx) and order of connector signal wires at both
ends of cable.
If fault appears after encoder feedback has already been used or during drive :
1. Check that encoder connection wiring or encoder is not damaged.
2. Check that encoder interface module (FEN-xx) connection or module is not damaged.
3. Check earthings (when disturbances are detected in communication between encoder interface module and encoder).
4. For more information on encoders, see parameter groups 90 Feedback selection, 91 Encoder module settings, 92 Encoder
1 configuration and 93 Encoder 2 configuration.
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