75
3rd block parameter
Symptoms Causes Remedies
Reference
pages
Response is too slow.
Output changes
between ON and OFF,
but the reading does
not change.
Input lter constant is too large. Decrease the set value of the
parameter of [P-dF].
Page 48
Some input terminals are short-
circuited.
Remove the short-circuited terminals. ―
The connecting cable for the device
to be controlled are not connected
properly.
Connect it properly. ―
The device to be controlled has
powered off.
Power it on. ―
The output signals of this controller
do not match the input signals of the
device to be controlled.
Prepare this controller to be suitable
for the device to be controlled. Or
select the device to be controlled to
be suitable for this controller.
―
The SV cannot be
changed.
“1” or “4” is set in the parameter of
[LoC].
Set the parameter of [LoC] to “0”, “2”,
“3” or “5”.
Page 29
You have tried to set the value that is
outside of the SV limitter (Parameters
of [SV-L] and [SV-H]).
Widen the range between [SV-L] and
[SV-H]. (However, it should be within
the set range in the input range table.)
Page 58
The ramp soak control is ongoing
(RUN or HLd), or completed (ENd).
Set the parameter of [ProG] to “oFF.” Page 22
Auto-tuning does not
work properly.
After starting the auto-tuning
operation, the display has shown
“UUUU” or “LLLL.”
Set the parameters again so that the
difference of the set values of [P-SL]
and [P-SU] is made larger, and perform
the auto-tuning again.
Page 43
You have changed the SV after
starting the auto-tuning operation.
Set the desirable SV, and perform the
auto-tuning again.
Page 25
You have tried to perform the auto-
tuning during ramp soak operation.
Set the parameter of [ProG] to “oFF,”
and perform the auto-tuning again.
Page 22
Peripheral devices have problems.
Or they are not connected properly.
Connect them properly. ―
Normal/reverse actions are not
suitable for the operations of the
device to be controlled.
Set the parameter of [P-N1] properly. Page 57
The response of the controlled device
was too slow, and the auto-tuning did
not nish in 9 hours.
Perform the tuning manually. (Set the
parameter of [P] to “0.0” to try the
ON/OFF control.)
Page 30
An excessive overshoot
has occurred during
auto-tuning operation.
― Perform the auto-tuning with the
parameter of [At] being “L-oN” (Low
PV type).
Page 25
― Perform the tuning manually. ―
The self-tuning does
not work properly.
See the section of the parameter of [CtRL]. Page 36