Rockwell Automation 2099-BMxx Kinetix 7000 High Power Servo Drive User Manual - Manual (Page 145)

Rockwell Automation Publication 2099-UM001D-EN-P - December 2012 145
Troubleshoot the Kinetix 7000 Drive System Chapter 6
You cannot obtain the motor
acceleration/deceleration that you
want.
Torque Limit limits are set too low. Verify that current limits are set properly.
Incorrect motor selected in configuration. Select the correct motor and run Tune in RSLogix 5000 software.
The system inertia is excessive.
• Check motor size against the application need.
• Review servo system sizing.
The system friction torque is excessive. Check motor size against the application need.
Available current is insufficient to supply the correct accel/decel rate.
• Check motor size against the application need.
• Review servo system sizing.
Acceleration limit is incorrect. Verify limit settings and correct them, as necessary.
Velocity Limit limits are incorrect. Verify limit settings and correct them, as necessary.
Motor does not respond to a
velocity command.
The axis cannot be enabled for 1.5 seconds after disabling. Disable the axis, wait for 1.5 seconds, and enable the axis.
Enable signal has not been applied or the enable wiring is incorrect.
• Check the controller.
• Check the wiring.
The motor wiring is open. Check the wiring.
The motor thermal switch has tripped.
• Check for a fault.
• Check the wiring.
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 current limits are set incorrectly. Check and properly set the limits.
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.
• Refer to System Design for Control of Electrical Noise, publication
GMC-RM001 .
Line frequency may be present.
• Verify grounding.
• Route wire away from noise sources.
Variable frequency may be velocity feedback ripple or a disturbance
caused by gear teeth, ballscrew balls, or other mechanical wear. The
frequency may be a multiple of the motor power transmission
components or ballscrew speeds resulting in velocity disturbance.
• Decouple the motor for verification.
• Check and improve the performance of the gearbox, ballscrew, and
other mechanical items.
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 connect 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.
Condition Potential Cause Possible Resolution