16
Auto-tuning function (Settings: 0/1/2)
[Description]
[Setting example] Setting the auto-tuning operation to 1
[Note]
If the controller is powered off during auto-tuning, this
makes the auto-tuning ineffective with each parameter
of , , and unchanged. To start the auto-tuning
operation, set to “1” or “2” again.
• To suspend the auto-tuning, set to “0”. This makes
the auto-tuning cancel with each parameter of , , and
unchanged.
• Once the parameters of , , and are set automatically
by the auto-tuning, those parameters are stored in the
controller even after it is powered off. Therefore, it is not
necessary to execute the auto-tuning again.
• By setting to “1” or “2” , the auto-tuning operation
starts, and at the end of the tuning, will be displayed
automatically to .
• After the auto-tuning operation, the controller starts to
operate at the automatically set values of , , and .
• A decimal point at the right end of the SV display flashes
during auto-tuning.
• There are two codes for AT:
Setting code [1]: SV standard type
Performs the auto-tuning based on the SV.
Setting code [2]: Low PV type
Performs the auto-tuning based on the
SV-10%FS.
[Note]
Since ON/OFF control is performed during auto-tun-
ing, overshoot against the SV may occur. To reduce
the overshoot, execute the auto-tuning operation with
the setting code [2] (Low PV) selected.
• The auto-tuning can be executed both just after power-on
and in a control or stable status.
Related parameters:
(page 20)
(page 21)
(page 22)
(page 26)
(page 24)
When the auto-tuning finishes properly, a decimal point stops flashing, and the set values of , ,
and parameters change. When the auto-tuning finishes abnormally, a decimal point stops flash-
ing, but the set values of , , and parameters remain unchanged.
Press the key once. is displayed and the auto-tuning will start. During auto-tuning,
a decimal point at the first digit from the right end of the display flickers.
Press and hold the key for one second.
will be displayed.
Press the or keys to flicker the display and to display .
(Repeat the procedure from 3 to 5 to check the set value.)
Press the key once.
The current setting ( ) is displayed.
Press the key to display .
SEL
SEL
SEL
1.
4.
6.
If you want to display the operation status, press and hold the key for two seconds.
The SV is displayed on the display area.
If unoperated state continues, the PV will be displayed.
7.
2.
3.
SEL
5.
Display Operating procedure
PV indication
PV indication
PV indication
SV indication
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