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13. Trouble shooting
Condition
Items to be confirmed
1. There is an error in PV
or PV is not stable
・
Confirm that there is no problem in the wiring with the sensor.
・
For thermocouple, confirm that wiring is done till the terminal screw by
using thermocouple and compensation lead wire.
・
Confirm that the terminal screws are tightened properly.
・
Confirm that sensor signal is not connected in parallel with other
instrument.
・
Confirm that protective elements etc are connected to sensor signal
and the impedance does not become high.
・
Confirm that there is no problem in output specifications (impedance
etc.) and output signal of sensor itself.
・
Confirm that ground terminal is connected to good quality protective
ground.
・
Confirm that there is no noise.
・
Confirm that there is no problem in the environment and atmosphere
(surrounding temperature, wind etc.)
・
Confirm that set contents of various parameters (Measurement range,
sensor correction, customer scale calibration etc) are correct.
2. PV display becomes
'¯ ¯ ¯ ¯ ¯'.
・
It indicates excessive input or higher limit burn out for measurement
range. Confirm the sensor signal.
3. PV display becomes
'_ _ _ _ _'.
・
It indicates very little input or lower limit burn out for measurement
range. Confirm the sensor signal.
4. Control is not stable.
・
Confirm that there is no problem with the wiring of the actuator.
・
Confirm that the terminal screw is tightened properly.
・
Confirm that there is no noise.
・
Confirm that the set contents of various parameters (PID, output limiter
etc.) are correct.
Ú
Regarding controllability, it is necessary to do the design/adjustment
not only in just the controller but in the entire system of the final
product. If the controllability does not improve even on adjusting the
set contents of various parameters (PID etc.) of the controller,
consult the designer of this final product.
5. 'ERR' of status display lights.
・
It indicated abnormality in taking the input. In addition to chances of
abnormality in the internal circuit of the controller, it might be adversely
affected by noise also, hence confirm that there is no noise.
6. Cause unclear however
operation is strange
・
Confirm that the contents of various parameters are correct.
・
Even then if the operation of the controller is strange, initialize the set
contents. Do all the settings again and confirm that there is no
problem in it.
Summary of Contents for KP 2000 Series
Page 1: ...INST No INE 809A Digital Program Controller KP2000 General ...
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