
1/03 UDC 6300 Process Controller Product Manual 253
8.3 Power-up Tests
What happens at
power-up
When the controller is powered-up, three tests are run by the UDC6300
software to ensure memory integrity.
As the tests are run, the displays will appear as shown in Table 8-3.
Table 8-3 Power-up Tests
Lower Display Upper Display
RAM TEST PASS or FAIL
CONFTEST PASS or FAIL
CAL TEST PASS or FAIL
After these tests, every segment in the display is turned on for 5 seconds,
and then “TEST DONE” is shown in the Lower Didplay.
The controller then checks the non-volatile memory, displaying
‘CHECKING MEMORY” in the Lower Display.
Test failures
If any of these tests fail, “FAIL” will appear momentarily in the upper
display, then a display test is run, after which the controller will go into
Failsafe Manual mode and you will see:
Lower Display
Upper Display
FAILSAFE
PV value
(blinking)
Refer to “Status Tests” to determine which tests have failed and how to
correct them.
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