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Problem
Possible Cause
Solution
The indication of PV
Display is irregular
or unstable.
Check whether sensor input or
temperature unit (
or
) is correct.
Select the input type and
temperature unit (
or
) correctly.
Sensor correction value is
unsuitable.
Set it to a suitable value.
Check whether the sensor
specifications are correct.
Use a sensor with appropriate
specifications.
AC leaks into the sensor circuit.
Use an ungrounded type sensor.
There may be equipment that
interferes with or makes noise near
the instrument.
Keep the instrument clear of any
potentially disruptive equipment.
11.2 Key Operation
Problem
Possible Cause
Solution
None of the set values
(Step SV, step time,
OUT1 proportional band,
EV
alarm value, etc.)
can be set.
‘Lock’ is selected in [Set value lock]. Select ‘Unlock’ in [Set value lock].
AT is performing.
Cancel the AT.
The setting indication
does not change in the
input range, and new
values are unable to be
set.
SV high or low limit value may be set
at the point where the value does
not change.
Set them to a suitable value.
A pattern number cannot
be selected by the
key.
A pattern number might be selected
by means of Event input.
The pattern number selected via
Event input has priority over a
pattern number selected by the
key.
Open the COM terminal and
any one terminal of Event input (DI1
to DI4).
Содержание PCA1
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