1/01 UDC3300 Limit Controller Product Manual 73
7.3 Power-up Tests
What happens at
power-up
When the controller is powered-up, three tests are run by the UDC3300
software to ensure memory integrity.
As the tests are run, the displays will appear as shown in Table 7-3.
Table 7-3 Power-up Tests
Lower Display Upper Display
RAM TEST
PASS or FAIL
CONFTEST
PASS or FAIL
CAL TEST
PASS or FAIL
Test failures
If any of these three tests fail, “FAILED” will appear momentarily in the
upper display, then a display test is run, after which the controller will go
into 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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