Rockwell Automation 1394 SERCOS Interface Multi-Axis Motion Control System - Manual (Page 39)

Publication 1394-IN024B-EN-P — February 2004
Troubleshooting Your 1394 SERCOS Interface System 2-3
Troubleshooting System
and Axis Module LEDs The system module Status LED is visible from the front of the module.
Refer to figures 1.1 and 1.2 for the location of the system module
status LED.
If the System Module LED is: Potential Cause is: Possible Resolution is:
Steady red
Terminator not installed. • Install terminator.
Malfunctioning system module.
• Verify wiring.
• Secure wiring connections.
• Replace the module.
• Check logic supply ratings.
• Contact your local Allen-Bradley
Support Representative.
Flashing red
A fault has occurred in the system
(check for faults through the RSLogix
5000, DriveExplorer

, or the HIM).
• Reset faults.
• Verify wiring.
• Secure wiring connections.
• Check SERCOS fiber-optic
connections.
Alternating red and green
DC bus is not up. Apply three-phase power.
Open fuse or malfunctioning contactor
on user-supplied 3 phase input.
• Check wiring to start/stop circuitry.
• Check the user program.
• Check fuse.
Malfunctioning system module. Replace the module.
Steady green The bus is up and axes are enabled. None needed.
Flashing green
The bus is up, but no axis is enabled.
• Check axes and enable them, if
necessary.
• Verify that enable wiring is correct
and not open.
Enable signal from position controller
is not present.
• Check axes and enable them, if
necessary.
• Verify that enable wiring is correct
and not open.
• Check I/O connections on control
board.
Controller has detected a machine
system malfunction and will not enable
the 1394. • Check controller.
• Check the machine.
Not illuminated
There is no power to the system
module.
• Check 24V ac/dc logic power
supply.
• Check main ac input power supply.