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1/03 UDC 6300 Process Controller Product Manual 257
8.5 Background Tests
Introduction
The UDC6300 performs on-going background tests to verify data and
memory integrity. If there is a malfunction, an error message will be
displayed (blinking) in the lower display.
Background Tests
In the case of more than one simultaneous malfunction, only the one with
the highest priority will appear in the lower display. Table 8-6 lists these
background tests, the reason for their failure, and how to correct the
problem.
Table 8-6 Background Tests
Lower
Display
Reason for Failure How to Correct the Problem
EE FAIL
Unable to write to non-volatile
memory. Anytime you change a
parameter and it is not accepted, you
will see EE FAIL.
1. Check the accuracy of the parameter and re-
enter.
2. Try to change something in configuration.
3. Run through STATUS tests to re-write to
EEPROM.
FAILSAFE
This error message shows whenever
the controller goes into a failsafe
mode of operation. This will happen if:
• RAM test failed
• Configuration test failed
• Calibration test failed
• EEPROM test failed
• Any input used for PV or
RSP has failed.
1. Run through STATUS check to determine the
reason for the failure.
2. Press the SET UP
key until STATUS
appears in the lower display.
3. Press the FUNC
key to see what tests pass
or fail, then run through the STATUS codes a
second time to see if the error cleared.
4. Correct according to the recommendations
given in Table 8-5.
IN1 FAIL
IN2 FAIL
IN3 FAIL
IN4 FAIL
Failure of input integration. i.e., cannot
make analog to digital conversion.
1. Make sure the input configuration and wiring
is correct.
2. Make sure the correct resistor is attached to
the rear terminals for the particular range
required.
3. Check for gross over-ranging.
IN5 FAIL
Failure of input 5 integration. i.e.,
cannot make analog to digital
conversion.
1. Make sure the actuation is configured
correctly. See Section 3 - Configuration.
2. Make sure the input configuration and wiring
is correct.
3. Make sure the Cold Junction is connected to
the Thermocouple ranges.
4. Check for gross over-ranging.
5. Replace the Cold Junction Resistor.
CONF ERR
• PV low limit is > PV high limit
• SP low limit is > SP high limit
• Reset low limit is > Reset high limit
• Output low limit > Output high limit
1. Check the configuration for each item and
reconfigure if necessary.
Table 8-6 continued on next page
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