Appendix
– Troubleshooting
18
Faults/Alarms/Difficulties
Description
Solutions
Once Per Revolution Bump
The motor would jerk every
time the target sensor goes
pass the proximity sensor
NOTE: for MRL setup, use
the Z Edge Count (D1) to see
when the target is being seen
by the drive if you can’t see
the motor
Parameter Setting
Verify that the Encoder
Pulses (A1) matches the
number for Measured PPR
(D1) while the motor is
rotating at high speed
If they don’t match, enter
measured PPR in Encoder
Pulses (A1).
RTR NOT ALIGN
Run command given before
aligning the rotor.
The drive does not have a
good fix on the motor’s
magnets.
Alignment Failed
Perform a Rotor Align (U10)
Verify the motor is
connected properly
Verify that the motor isn’t
bad
Verify that the contactor is
picked while the drive is
performing the alignment
