Diagnostic Messages; Table 4-4 Diagnostic Messages - Honeywell UDC2500 Product Manual

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.
Prompt
EE FAIL
IN1FL
IN2FL
CFGERR
IN1RNG
IN2RNG
PV LIM
FAILSF
RV LIM
SEG ERR
LOCK
TCWARN
TCFAIL
OUT1 FL
OUT2 FL
* 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.
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Table 4-4 Diagnostic Messages

Unable to write to non-volatile memory.
Two consecutive failures of input 1 integration.
Two consecutive failures of input 2 integration.
Configuration Errors—Low limit greater than high limit for PV, SP, Reset, or
Output.
Input 1 Out-of-Range
Out-of-range criteria:
Linear range: ± 10 % out-of-range
Characterized range: ± 1 % out-of-range
Input 2 Out-of-Range—Same as Input 1.
PV Out-of-Range
PV = (PV source x PV source ratio) + PV source bias
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.
Remote Variable Out-of-Range
RV = (RV source x RV source ratio) + RV source bias
Segment Error—SP Program starting segment number is less than ending
segment number.
The lockout feature has been enabled to prevent unauthorized changes of
certain functions or parameters.
Thermocouple sensor is starting to burnout.*
Thermocouple sensor is in imminent danger of burning out.*
Current Output 1 is less than 3.5 mA.**
Current Output 2 is less than 3.5 mA.**
UDC2500 Universal Digital Controller Product Manual
Monitoring and Operating the Controller
Description
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