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7. Functions
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Caution
The ramp soak function ( page 15), and SV selection function ( SDJHFDQQRW
be combined.
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212))SRVLWLRQ
control
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and SV Can build a control system out of simple elements such as SSR.
Suitable when accuracy is not requested.
SDJH
3,'&RQWUROV 3,'FDOFXODWLRQDQGFRQWUROVSURFHHGDFFRUGLQJWRWKHSUHYLRXVO\VHW3,'
parameters.
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It is the most basic control in this equipment.
SDJH
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control. It is effective when you want to suppress overshoot when SV is
changed, even if you may take a long time to reach the target value.
SDJH
Self-tuning Control $XWRPDWLFDOO\FDOFXODWLQJ3,'FRQWURODFFRUGLQJWRWKHFRQWUROWDUJHWRU69
change. It is effective when the control conditions change frequently.
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21WKLV3,'FRQWUROFDQVXSSUHVVWKHDPRXQWRIRYHUVKRRWGXULQJFRQWURO
WDUJHWWXUQV2))ĺ21
SDJH
2-degrees-of-freedom
control
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which is effective in reducing overshoot after a SV change or at startup.
SDJH
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$FWVDVDQ212))FRQWUROZKHQ (" ").
212))FRQWUROVZLWFKHVWKHFRQWURO RXWSXW WR21RU2))DFFRUGLQJ WR WKHVL]H
relationship of PV and SV.The output hysteresis can be set under the parameter "
" (" ").
Reverse Operation (heat control)
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to the control target.
Parameter Set value
"
"
R1R)
" "
rv--
" "
arbitrary (factory setting: 1 °C)
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Method used to control the cooling machine
Parameter Set value
"
"
R1R)
" "
no--
"
"
arbitrary (factory setting: 1 °C)
Point
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Ɣ 7KHPDQXDORSHUDWLRQGXULQJ212))FRQWUROZLOOEHFRPH09 ZKHQWKH
NH\LVSUHVVHGDQG09 ZKHQWKH
key is pressed.
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IUHTXHQWO\VZLWFK21DQG2)) 1RWH WKDW LW PD\ DIIHFWWKHRSHUDWLRQOLIHRIWKHFRQWDFW
output.
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FDOFXODWH3,'EDVHGRQWKHVHWYDOXHVIRUSDUDPHWHUV
", " ", " ", and " ", and output the calculated
result (-5% to 105%).
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automatically set the values.
Refer to
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'LVSOD\WKHV\VWHPPHQX ").
'LVSOD\WKHFRQWUROSDUDPHWHU DQGFKRRVH3,'FRQWUROV ").
Press the
key to set the value.
PV
ON
OFF
control output
t
SV
process value
PV<SV
PV>SV
HYS
PV<SV
PV>SV
PV
ON
OFF
control output
t
SV
process value
HYS
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5HODWHGWRQRUPDO3,'FRQWUROVIX]]\3,'FRQWURODFWVZLWKVPDOORYHUVKRRW
<RXZLOOQHHGWRUXQDXWRWXQLQJWRVHWWKH3,'SDUDPHWHUZKHQXVLQJIX]]\FRQWURO
6HWWLQJIX]]\3,'FRQWURO
'LVSOD\WKHV\VWHPPHQX ").
'LVSOD\WKHFRQWUROSDUDPHWHU
") and choose fuzzy (" ").
Press the
key to set the value.
Refer to
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7-4. Self-tuning Control
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that the control target or set value (SV) changes.
Self-tuning is especially effective for situations when a high level of control is not needed, but auto-
tuning cannot be run due to frequent changes in the control target conditions.
Point
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control.
Conditions where self-tuning can be used
Self-tuning is used in the following situations:
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Ɣ:KHQWHPSHUDWXUHULVHVZKHQ69FKDQJHVRUZKHQWKHFRQWUROOHUGHFLGHVLWLVQHFHVVDU\
Ɣ:KHQWKHFRQWUROOHUGHFLGHVLWLVQHFHVVDU\EHFDXVHWKHFRQWUROVKDYHEHFRPHXQVWDEOH
Conditions where self-tuning cannot be used
Self-tuning cannot be used in the following situations:
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Ɣ'XULQJDXWRWXQLQJ
Ɣ'XULQJUDPSVRDNSURJUHVV
Ɣ:KHQWKHUHLVHUURULQSXW
Ɣ:KHQVHWIRUGXDORXWSXW
Ɣ:KHQDQ\RIWKH3,'$USDUDPHWHUVDUHVHWWRPDQXDO
Ɣ'XULQJPDQXDOPRGH
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Conditions to halt self-tuning
Halt self-tuning in the following situations:
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soak function, remote SV function, or ramp SV.)
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Setting self-tuning
Turn on power of the controller and set the SV.
'LVSOD\WKHV\VWHPPHQX ").
'LVSOD\WKHFRQWUROOHUSDUDPHWHU ") and choose self-tuning (" ").
Press the
key to set the value.
Turn off power of the controller.
Turn on power of the control target equipment and the controller. Turn on power of the control
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dead time
t
process value
tuning
SV
lag time
Point
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Ɣ 7RUHVHWVHOIWXQLQJVHWWKHFRQWUROPHWKRGWR3,'
") once before changing back to
self-tuning.
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