Rockwell Automation 1394 SERCOS Interface Multi-Axis Motion Control System - Manual (Page 47)

Publication 1394-IN024B-EN-P — February 2004
Troubleshooting Your 1394 SERCOS Interface System 2-11
MotFeedback
NoiseFault
(Ax: Mtr Fdbk Noise)
Excessive noise detected
on feedback signals.
Poor grounding.
• Check ground clamp connectors.
• Check system module grounding.
MotorOvertemp
Fault
(Ax: Motor x
Overtemp)
The motor thermal switch
was tripped.
Motor overload.
• Allow motor to cool down and investigate
the cause of the motor overload.
• Motor not sized properly.
OverSpeedFault
(Ax: Overspeed)
Motor velocity exceeded
the overspeed trip limit.
Axis speed has reached 150% of the maximum
rated setting. The 100% trip point is dictated by
the lesser of the user velocity limits or the motor
maximum speed rating.
• Verify operating parameters.
• Verify application requirements.
DriveOvertemp
Fault
(Ax: Overtemp)
Axis module temperature
limit exceeded
The fan on the system module or an axis module
failed.
Replace the system or axis module.
The cabinet ambient temperature is above rating. Check the cabinet temperature.
The machine duty cycle requires an RMS current
exceeding the continuous rating of the controller. Change the command profile to reduce speed
or increase time.
The airflow access to the 1394 is limited or
blocked. Check airflow and re-route cables away from
the 1394.
DriveOvercurrent
Fault
(Ax: Power Fault)
The current through any
one of the power IGBTs has
exceeded 300% of the
1394’s current rating.
The motor lead has shorted.
• Check the motor cable.
• Check the resistance of each power phase
wire to ground. It should be Mega ohms.
• Make sure ferrite cores are not installed
on motor power conductors.
The motor is malfunctioning.
• Check the resistance of each motor
winding phase to case ground with an
ohm meter. Readings should be in Mega
ohms.
• Return motor for repairs.
Power IGBTs are malfunctioning. Replace the axis module.
Fault Message
RSLogix (HIM):
Description: Potential Cause is: Possible Resolution is: