Troubleshooting/Service
7.3 Power-up Tests
For controller configured for Three Position Step Control with motor position indication
and Auto-cal has never been done, the prompt CAL MTR will appear to suggest that the
controller be calibrated. Refer to Subsection 6.4 - Three Position Step Output
Calibration.
What happens at power-up
When power is applied, the controller will run three diagnostic tests. After these tests are
completed, “TEST DONE” is displayed.
Failsafe Failures
If one or more of these tests fail, the controller will go to the Failsafe Manual Mode, and
FAILSF will flash in the lower display and a message indicating which test failed will
appear in the lower display. Then, “DONE” will appear in the lower display.
Three Position Step test failures
7.4 Status Tests
Introduction
When required, the results of these tests can be checked to determine the reason the
controller has gone to Failsafe.
How to check the status tests
The procedure in Table 7-2 tells you how to display the results of the status tests.
Table 7-2 Procedure for Displaying the Status Test Results
Step Operation Result
1
Select
STATUS
Set Up Group
SetupSetup
Upper Display = READ
Lower Display = STATUS
2
Read the test
results
Function
FunctionFunction
You will see:
Upper Display = NO or YES YES indicates a failure
Lower Display = FAILSAFE
Function
FunctionFunction
Upper Display = PASS or FAIL
Lower Display = TEST
Press
156 UDC3200 Universal Digital Controller Product Manual 12/04
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