The Pseries drive has its own absolute encoder offset.
This may cause a conflict if looking at the Cyclic Monitor screen vs actual results with retrieving the motor's absolute encoder position:
Can I get absolute encoder position from my P Series Pulse/Indexer Drive?
To reset the P series drive absolute encoder offset, power on the drive without the absolute encoder connected. This will cause AL-38 alarm.
The under Procedures > Misc Functions use the Absolute Encoder Reset: