TROUBLESHOOTING (Cont’d)
-72-
PROBLEMS
POSSIBLE CAUSE
REMEDIES
“SENS” IN DISPLAY
(CN63300)
1. Input exceeds range of controller.
2. Incorrect input wiring.
3. Defective transmitter
4. Internal malfunction.
1. Check input signal level.
2. Check input wiring.
3. Check signal calibration.
4. Check calibration.
“OLOL” IN UPPER DISPLAY
1. Input exceeds range of controller.
2. Temperature exceeds range of input probe.
3. Excessive positive probe temperature.
4. Loss of set-up parameters.
1. Check sensor or input signal level.
2. Change to input sensor with a higher temperature range.
3. Reduce temperature.
4. Check set-up parameters.
“ULUL” IN UPPER DISPLAY
1. Input is below range of controller.
2. Temperature below range of input probe.
3. Excessive negative probe temperature.
4. Loss of set-up parameters.
1. Check sensor or input signal level.
2. Change to input sensor with a lower bottom range.
3. Increase temperature.
4. Check set-up parameters.
“SHrt” IN DISPLAY
(CN63100)
1. RTD probe shorted.
1. Check wiring.
2. Replace RTD probe.
CONTROL SLUGGISH OR NOT
STABLE
1. Incorrect PID values.
2. Improper probe location.
1. See PID Control.
2. Evaluate probe location.
“OLOL” OR “ULUL” IN LOWER
DISPLAY
1. Signal input exceeds allowable range by 5%.
1. Check Remote Signal Source.
Содержание CN63100 Series
Страница 23: ...FRONT PANEL PROGRAMMING CHART FOR CN63100 CN63300 CONTROLLERS 15 ...
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Страница 62: ...PID Adjustments Cont d 54 Figure 33 Process Response Extremes ...
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