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Monitoring and Operating the Controller
4/07 UDC2500 Universal Digital Controller Product Manual 95
4.5.3 Diagnostic Messages
The UDC2500 performs background tests to verify data and memory integrity. If there is
a malfunction, a diagnostic message will be shown on the lower display. In the case of
more than one simultaneous malfunction, only the highest priority diagnostic message
will be displayed. Table 4-4 shows the error messages in order by priority. If any of these
diagnostic messages appear on the lower display, refer to Section 7 - Troubleshooting for
information on how to correct the problem.
Table 4-4 Diagnostic Messages
Prompt Description
EE FAIL
Unable to write to non-volatile memory.
IN1FL
Two consecutive failures of input 1 integration.
IN2FL
Two consecutive failures of input 2 integration.
CFGERR
Configuration Errors—Low limit greater than high limit for PV, SP, Reset, or
Output.
IN1RNG
Input 1 Out-of-Range
Out-of-range criteria:
Linear range: ± 10 % out-of-range
Characterized range: ± 1 % out-of-range
IN2RNG
Input 2 Out-of-Range—Same as Input 1.
PV LIM
PV Out-of-Range
PV = (PV source x PV source ratio) + PV source bias
FAILSF
Failsafe — conditions for failsafe are:
… EEROM Test Failed
… Scratch Pad RAM Test Failed
… Configuration Test Failed
… Field or Factory Cal Test Failed
Check the “Status” group.
RV LIM
Remote Variable Out-of-Range
RV = (RV source x RV source ratio) + RV source bias
SEG ERR
Segment Error—SP Program starting segment number is less than ending
segment number.
LOCK
The lockout feature has been enabled to prevent unauthorized changes of
certain functions or parameters.
TCWARN
Thermocouple sensor is starting to burnout.*
TCFAIL
Thermocouple sensor is in imminent danger of burning out.*
OUT1 FL
Current Output 1 is less than 3.5 mA.**
OUT2 FL
Current Output 2 is less than 3.5 mA.**
* The Thermocouple Error messages can be disabled via the TCDIAG configuration in the DISPLAY setup group.
** The Current Output Error messages can be disabled via the DIAGAL configuration in the ALARM setup group.