Key Operation - Panasonic KT9 Instruction Manual

Problem
The value set during
the Scaling low limit
setting remains on the
PV display.
The indication of
PV display is
abnormal or unstable.
[ ] is indicated
on the PV display.

10.2 Key operation

Problem
Unable to set SV, P,
I, D, proportional cycle,
alarm value, etc.
The value does not
change by the
,
keys.
The setting indication
does not change within
the input range even
if the
,
are pressed, and new
values are unable to
be set.
• Check whether the input signal wire for DC voltage
(0 to 5V DC, 0 to 10V DC) or DC current (0 to 20mA DC)
is disconnected.
How to check whether the input signal wire is disconnected
[DC voltage (0 to 5V DC, 0 to 10V DC)]
If the input to the input terminal of this controller is 1V DC
and if a value corresponding to1V DC is indicated, the
controller is likely to be operating normally, however, the
input signal wire may be disconnected.
[DC current (0 to 20mA DC)]
If the input to the input terminal of this controller is 1mA DC
and if a value corresponding to 1mA DC is indicated,
the controller is likely to be operating normally, however,
the input signal wire may be disconnected.
• Check whether the input lead wire terminals for DC voltage
(0 to 5V DC, 0 to 10V DC) or DC current (0 to 20mA DC)
are securely connected to the instrument input terminals.
• Check whether the sensor input and temperature unit
( or ) setting are correct.
Set the sensor input and the temperature unit properly.
• Sensor correcting value is unsuitable.
Set it to a suitable value.
• Sensor specification is improper.
Set the sensor specification properly.
• AC may be leaking into the sensor circuit.
Use an ungrounded type sensor.
• There may be equipment that interferes with or makes
noise near the controller.
Keep equipment that interferes with or makes noise away
from the controller.
The internal memory is defective.
Please contact our main office or dealers.
• Set value lock (Lock 1 or Lock 2) is selected.
Release the lock selection.
• During PID auto-tuning or auto-reset.
Cancel the auto-tuning if necessary.
Auto-reset ends 4 minutes after starting.
• SV high limit or low limit may be set at the point where the
value does not change.
Set it to a suitable value while in Auxiliary function setting
keys
mode 1.
Presumed cause and solution
Presumed cause and solution
45