Err 55.0 A-phase wiring error fault in panasonic drive

Err 55.0 A-phase wiring error fault in panasonic drive means phase A wiring of the external scale is reversed or broken.

Cause: Phase A wiring of the external scale is reversed or broken.

Remedy:

• Check continuity of Phase A and /A wires.
• Swap A and /A if the scale counts in the wrong direction during setup.