Honeywell UDC2500 Product Manual page 177

Lower
Display
IN2RNG Input 2 out of range. The remote input
is outside the range limits.
IN2_FL Two consecutive failures of input 2
integration. i.e., cannot make analog
to digital conversion.
CNFERR • PV low limit is > PV high limit
• SP low limit is > SP high limit
• Output low limit > Output high limit
PV out of range.
PV LIM
PV = INP1 x RATIO1+ INP1 BIAS
The result of the formula shown below
RV LIM
is beyond the range of the remote
variable.
RV = INP2 X RATIO + BIAS
SEGERR Setpoint Program start segment
number is less than ending segment
number.
TCWARN The Thermocouple is starting to
burnout.
The Thermocouple is in imminent
TCFAIL
danger of burning out.
OUT1FL Current Output is less than 3.5 mA.
Auxiliary Output is less than 3.5 mA.
OUT2FL
4/07
Reason for Failure
UDC2500 Universal Digital Controller Product Manual
How to Correct the Problem
Same as IN1RNG above.
Same as IN1FL above.
1. Check the configuration for each item and
reconfigure if necessary.
1. Make sure the input signal is correct.
2. Make sure the Ratio and Bias settings are
correct.
3. Recheck the calibration. Use Bias of 0.0
1. Make sure the input signal is correct.
2. Make sure the Ratio2 and Bias2 settings are
correct.
3. Recheck the calibration. Use a Ratio2 of 1.0
and a Bias2 of 0.0.
Check SP Program configuration, subsection 3.5
Set up Group SPPROG function prompts
"STRSEG" and "ENDSEG".
This diagnostic message means that the
controller has detected that the thermocouple is
starting to burnout. This error message may also
be created if the resistance of the wires used to
connect the thermocouple to the instrument is
above 100 ohms.
This diagnostic message means that the
controller has detected that the thermocouple
will soon fail. User should consider replacing the
thermocouple as soon as possible. This
message will also be generated if the resistance
of the wires used to connect the thermocouple to
the instrument is above 180 ohms.
The current output is open circuit. Check the
field wiring. See Procedure #2.
The auxiliary output is open circuit. Check the
field wiring. See Procedure #10.
Troubleshooting/Service
163