Appendix; Error Messages; Power Failure - Omega FUZZY LOGIC CN4800 Manual

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APPENDIX

1. ERROR MESSAGES

Display
If display indicates an error, remove its cause as soon as possible.

2. POWER FAILURE

a) Operation of this device is not affected in case of instantaneous
power failure with a duration of 20ms or less.
b) In case of power failure with a duration of 20ms or more, operation
is made in the same manner as when re-powering on is made.
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Cause
1. Thermocouple sensor burn out
2. Thermoresistance sensor disconnection
3. Input exceeding 105% of the input range
1. Thermoresistance sensor disconnection
2. Thermoresistance sensor short-circuit
3. Input under -5% of the input range
1. Heater disconnection
1. Control loop error (cause not specifically
determined)
1. Memory data destroyed
83
Control output
The value preset in
parameter "
"
is output. For details,
see "Output setting in
input abnormal" on
page76.
Going on control
Going on control

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