148 Rockwell Automation Publication 2198-UM001M-EN-P - November 2022
Chapter 7 Troubleshoot the Kinetix 5500 Drive System
Motor does not respond to a
command.
The axis cannot be enabled until stopping time has expired. Disable the axis, wait for 1.5 seconds, and enable the axis.
The motor wiring is open. Check the wiring.
The motor cable shield connection is improper.
• Check feedback connections.
• Check cable shield connections.
The motor has malfunctioned. Repair or replace the motor.
The coupling between motor and machine has broken (for example, the
motor moves, but the load/machine does not).
Check and correct the mechanics.
Primary operation mode is set incorrectly. Check and properly set the limit.
Velocity or torque limits are set incorrectly. Check and properly set the limits.
Brake connector not wired Check brake wiring
Presence of noise on command
or motor feedback signal wires.
Recommended grounding per installation instructions have not been
followed.
• Verify grounding.
• Route wire away from noise sources.
• See System Design for Control of Electrical Noise,
publication GMC-RM001
.
Line frequency can be present.
• Verify grounding.
• Route wire away from noise sources.
Variable frequency can be velocity feedback ripple or a disturbance that
is caused by gear teeth or ballscrew, and so forth. The frequency can be
a multiple of the motor power transmission components or ballscrew
speeds resulting in velocity disturbance.
• Decouple the motor for verification.
• Check and improve mechanical performance, for example,
the gearbox or ballscrew mechanism.
No rotation
The motor connections are loose or open. Check motor wiring and connections.
Foreign matter is lodged in the motor. Remove foreign matter.
The motor load is excessive. Verify the servo system sizing.
The bearings are worn. Return the motor for repair.
The motor brake is engaged (if supplied).
• Check brake wiring and function.
• Return the motor for repair.
The motor is not connected to the load. Check coupling.
Motor overheating
The duty cycle is excessive.
Change the command profile to reduce accel/decel or
increase time.
The rotor is partially demagnetized causing excessive motor current. Return the motor for repair.
Abnormal noise
Motor tuning limits are set too high. Run Tune in the Logix Designer application.
Loose parts are present in the motor.
• Remove the loose parts.
• Return motor for repair.
• Replace motor.
The through bolts or coupling is loose. Tighten bolts.
The bearings are worn. Return motor for repair.
Mechanical resonance.
Notch filter can be required (refer to Axis Properties dialog
box, Output tab in the Logix Designer application).
Erratic operation - Motor locks
into position, runs without
control or with reduced torque.
Motor power phases U and V, U and W, or V and W reversed. Check and correct motor power wiring.
Condition Potential Cause Possible Resolution
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