Wire them properly.
The PV display keeps indicating
the value which was set in the
Scaling low limit setting.
• Check if the input signal source for DC voltage (0 to 5V DC,
0 to 10V DC) and DC current (0 to 20mA DC) is normal.
How to check each signal wire
[DC voltage (0 to 5V DC, 0 to 10V DC)]
If the input to the input terminals of the instrument is 1V DC and
if the value corresponding to 1V DC is indicated, the instrument
should be normal and the signal wire may be disconnected.
[DC current (0 to 20mA DC)]
If the input to the input terminals of the instrument is 1mA DC and
if the value corresponding to 1mA DC is indicated, the instrument
should be normal and the signal wire may be disconnected.
• Are the input lead wire terminals for DC voltage (0 to 5V DC, 0 to
10V DC) or DC current (0 to 20mA DC) securely mounted to the
instrument input terminals?
Mount the sensor terminals to the instrument input terminals securely.
The indication of PV display is
abnormal or unstable.
• Is sensor input or temperature unit ( or ) correct?
Select the proper sensor input and temperature unit ( or ).
• Sensor correcting value is unsuitable. Set the value suitably.
• Is the specification of the sensor correct?
Set the sensor to the proper specification.
• AC leaks into the sensor circuit. Use an ungrounded type sensor.
• There may be a piece of equipment producing inductive
interference or noise near the controller.
Keep the equipment producing inductive interference or noise
away from the controller.
The PV display is indicating
[
].
• Internal memory is defective.
Contact our agency or us.
10.2 Key operation
Problem
Presumed cause and solution
• Unable to set the SV, P, I, D,
proportional cycle or alarm
setting
• The values do not change by
, key operation.
• Setting value lock (Lock 1 or Lock 2) is designated.
Release the lock designation.
• During PID auto-tuning or auto-reset.
In the case of PID auto-tuning, cancel the auto-tuning.
It takes approximately 4 minutes
until auto
-reset is finished.
The setting indication does not
change in the input range even if
the , keys are pressed,
and unable to set the value.
• SV high or low limit value in Auxiliary function setting mode 1 may
be set at the point the value does not change.
Set the proper value while in the Auxiliary function setting
mode 1.
10.3 Control
Problem
Presumed cause and solution
Temperature does not rise.
• Sensor is out of order.
Replace
the sensor.
• Sensor or control output terminals are not securely mounted to
the instrument input terminals.
Mount the sensor or control output terminals to the instrument
input terminals securely.
• The wiring of sensor or control output terminals is incorrect.
Connect it properly.
The control output remains
ON status.
• OUT1 or OUT2 low limit value is set to 100% or greater
in Auxiliary function setting mode 2.
Set the value appropriately.
The control output remains
OFF status.
• OUT1 or OUT2 high limit value is set to 0% or less in
Auxiliary function setting mode 2.
Set the value appropriately.
• If you have any inquiries, please consult our agency or the shop where you purchased the unit.
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