AB Quality Allen-Bradley 1394 User Manual page 180

9-14 Troubleshooting
Condition:
Motor does not respond to
a Velocity Command
Presence of noise on
Command or resolver
signal wires
Publication 1394-5.0 — May 2000
Potential cause:
Check for possible faults.
The axis cannot be enabled for 1.5 seconds after
disabling.
Enable signal has not been applied or the enable wiring is
incorrect.
The motor wiring is open.
The motor thermal overload has tripped.
The motor has malfunctioned.
The coupling between motor and machine has broken
(i.e., the motor moves, but the load/machine doesn't).
[Vel Source] parameter (364 (Analog Servo only)) is set
incorrectly.
[Torq Source] parameter (360 (Analog Servo only)) is set
incorrectly.
[CW, CCW VEL Lim] parameters (128, 132 (Analog
Servo only)) are set incorrectly.
The axis module has a malfunction.
Recommended grounding per installation instructions
and Appendix B has not been followed.
External 50/60 Hz line frequency may be present.
External 100/120 Hz from a single phase logic supply
may be present.
External180 or 360 Hz from other adjustable speed
drives may be present.
Variable frequency may be velocity feedback ripple or a
disturbance caused by gear teeth or ballscrew balls etc.
The frequency may be a multiple of the motor power
transmission components or ballscrew speeds resulting in
velocity disturbance.
Possible resolution:
Verify that the parameters are set
correctly and correct them, as necessary.
Disable the axis, wait for 1.5 seconds,
and enable the axis.
• Check the controller.
• Check the wiring.
Check the wiring.
• Check for a fault.
• Check the wiring.
Repair or replace the motor.
Check and correct the mechanics.
Check and properly set the parameter.
Check and properly set the parameter.
Check and properly set the parameter.
Replace the axis module.
• Verify grounding.
• Route wire away from noise sources.
• Verify grounding.
• Route wire away from noise sources.
• Verify grounding.
• Route wire away from noise sources.
• Verify grounding.
• Route wire away from noise sources.
• Decouple the motor for verification.
• Check and improve mechanical
performance of the gearbox, ballscrew,
etc.