F31125 Encoder: Absolute Position Invalid fault in siemens drive

F31125 Encoder: Absolute Position Invalid fault in siemens drive indicates that the absolute position track (EnDat/SSI) is giving an error. 

Cause 

1. Encoder battery dead (if applicable).
2. Glass scale dirty/cracked.
 

Remedy: 


- Check absolute encoder alignment. 
- Replace encoder.

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