Understanding How To Detect A Problem; Understanding System And Axis Module Leds - AB Quality Allen-Bradley 1394 User Manual

9-2 Troubleshooting
Understanding How to Detect a
Problem
Understanding System and Axis
Module LEDs
For this module: For this LED:
GMC Turbo, Status
GMC or Analog
Servo System
Module
Publication 1394-5.0 — May 2000
When a drive fault occurs, the LED on the front panel changes and a
fault message appears.
The majority of 1394 faults cause the DROK contact to operate. If a
drive fault occurs, you can reset the fault detection circuitry by
removing and reapplying power. However, if it is a hardware fault,
you need to correct the fault before restarting.
This material, along with the diagnostic/troubleshooting information
included with the position controller, will help you identify most
common system malfunctions and determine which module that
problem pertains to.
The system module and each axis module has one LED visible from
the front of the module. The LEDs are labeled "Status" on all axis
modules and "Status" for GMC, Analog Servo, and 9/440 versions and
"I/O Ring Status" for the CNC Interface system. They indicate status
as follows:
Status of the
Potential Cause:
LED:
Steady red Malfunctioning system module.
Flashing red A fault has occurred in system.
Alternating DC bus is not up.
red and
green
Open fuse or malfunctioning
contactor on user-supplied 3 phase
input.
Malfunctioning system module.
Steady green The bus is up and axes are enabled.
Flashing The bus is up, but no axis is enabled
green (Analog Servo only).
Enable signal from position
controller is not present (Analog
Servo only).
Position controller has detected a
machine system malfunction and
will not enable the 1394 (Analog
Servo only).
System enable is not powered (GMC
only).
Not There is no power to the system
illuminated module.
Possible resolution:
• Verify wiring.
• Secure wiring connections.
• Replace the module.
• Contact your local Allen-Bradley Support
Representative.
• Verify wiring.
• Secure wiring connections.
• Apply three-phase power.
• Check DC bus LED.
• Check wiring to start/stop circuitry.
• Check fuse.
Replace the module.
None needed.
• Check axes and enable them, if necessary.
• Verify that enable wiring is correct and not
open.
• Check axes and enable them, if necessary.
• Verify that enable wiring is correct and not
open.
• Check connections on input wiring board.
• Check position controller.
• Check the machine.
• Check the enable status at the Analog Servo
wiring board.
• Check the enable status.
• Check for 24V DC on system enable signal,
TB1 and TB2 (refer to the chapter Wiring
1394 GMC and GMC Turbo Systems, Figure
4.1 and Figure 4.2).
Check the power supply to the system module.