Rockwell Automation 1394 SERCOS Interface Multi-Axis Motion Control System - Manual (Page 38)

Publication 1394-IN024B-EN-P — February 2004
2-2 Troubleshooting Your 1394 SERCOS Interface System
Safety Precautions Observe the following safety precautions when troubleshooting your
1394 SERCOS interface system.
Understanding How to
Detect a Problem When a drive fault occurs, the LED on the front panel changes and a
fault message is transmitted to the position controller.
The majority of 1394 faults cause the Drive System OK contact to
open. If a drive fault occurs, you can reset the fault detection circuitry
by removing and reapplying logic 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.
ATTENTION
!
DC bus capacitors may retain hazardous voltages
after input power has been removed, but will
normally discharge in several seconds. Before
working on the drive, measure the DC bus voltage to
verify it has reached a safe level or wait the full time
interval listed on the warning on the front of the
drive. Failure to observe this precaution could result
in severe bodily injury or loss of life.
Do not attempt to defeat or override the drive fault
circuits. You must determine the cause of a fault and
correct it before you attempt to operate the system. If
you do not correct a drive or system malfunction, it
could result in personal injury and/or damage to
equipment as a result of uncontrolled machine
system operation.
If you use an oscilloscope (or chart recorder) for
troubleshooting, you must properly ground it. The
oscilloscope chassis can be at a potentially fatal
voltage if you do not properly ground it. Always
connect the oscilloscope chassis to an earth ground.
IMPORTANT
You can also reset a fault condition using RSLogix
5000 software.