Rockwell Automation 1326 Digital AC Multi-Axis Motion Control System User Manual - Manual (Page 177)

Publication 1394-5.0 — May 2000
Troubleshooting 9-11
Fault Message: Description: Potential cause: Possible resolutions:
Ground Flt The system generates a
ground fault when there
is an imbalance in the
DC bus of greater than
50A. Incorrect wiring. • Verify motor and ground wiring.
• Replace cables.
Motor malfunction. Check the resistance of each motor
winding phase to case ground with an
ohm meter. Readings should be in mega
ohms.
Axis Module IGBT malfunction. Replace the axis module.
Short to ground. • Replace the system or axis module.
• Check grounding and incoming power
wiring.
Hdwr Fault! Control hardware fault
detected. Terminator is not installed. Check slider connections/termination
strip.
The system module is bad. Replace the system module.
Memory! Hardware memory error
detected. CPU memory has failed. • Verify that EEproms are seated
properly.
• Replace the system module.
NV Memory! Non-volatile memory is
corrupt. A checksum failure has occurred on the
personality module. • Reset and save defaults.
• Replace personality module.
• Replace system module.
Ovr temp The 1394 contains a
thermal sensor which
senses the internal
ambient temperature. 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.
Phase Loss The three-phase input
line is monitored and a
fault will be issued
whenever a phase loss is
detected. One or more input line fuses have opened. Check fuses and replace, as necessary.
Input line contactor malfunction. • Correct wiring.
• Replace contactor.
Incorrect wiring. Check 360/480V AC input power at
system module.
Pre Charge The bus voltage did not
rise fast enough during
the pre-charge state. Short detected on the DC bus. • Check for shorts on the DC bus.
Axis enabled before the pre-charge checking
has cleared. • Verify that all phases are functioning
properly.
Commanding torque to axis before full bus
voltage is reached. • Verify the axis is not enabled before the
full 3-phase bus power is up.
Serial Flt! Serial communications
lost. If the message contains "CUS,"
communications were lost to the SCANport
device. Verify that SCANport device is
connected.
If the message contains "Axis," "Sys," or
"HDW," communications were lost. • Check the system’s terminator.
• Check the slider.
• Verify [Shunt R] parameter value
Sftwr Flt! Software error detected. A programming error was made. Reset drive.
Shunt TmOut The shunt resistor has
timed out. The regenerative energy produced by the
motor exceeded the limit of the shunt resistor. • Use a properly sized shunt or modify
duty cycle of the application.
• System uses internal shunt and requires
external shunt for additional capacity.
Unknown Flt! Fault is detected but
source is unknown. Wrong version of software for the hardware or
loose internal or external connection. • Check system terminator.
• Reset drive.
Unkn Module! A module unknown to
this version of software
is present. Wrong version of software for the firmware. • Obtain firmware that supports new
module type.
• Check slider terminations.
• Contact Allen-Bradley. Check software
version in system module.