3,'&RQWURO
,QWKHFDVHZKLFKWKHSRZHUVXSSO\RIWKHFRQWUROWDUJHWJRHV21ĺ2))ĺ21WKLV3,'FRQWUROFDQ
suppress the amount of overshoot.
This control introduces an algorithm to prevent the calculated PID result from becoming a
PLVFDOFXODWLRQHYHQZKHQWKHFRQWUROORRSLVRSHQ
<RXZLOOQHHGWRUXQDXWRWXQLQJWRVHWWKH3,'SDUDPHWHUZKHQXVLQJ3,'FRQWURO
Ɣ)HDWXUHVRI3,'&RQWURO
suppress overshoot
ON
OFF
control equipment power
t
SV
process value
control loop
close
close
open
PV
Setting PID2 control
Display the system menu ("
").
Display the control parameter ("
") and choose PID2 ("
").
Press the
key to set the value.
'HJUHHVRI)UHHGRP3,'&RQWURO
6XSSUHVVHV WKH DPRXQW RI RYHUVKRRW GXULQJ 3,' FRQWURO ,W XVHV WKH 69 ¿OWHU ZKLFK LV HIIHFWLYH LQ
reducing overshoot after a SV change or at startup.
Controllability in 2-degrees-of-freedom PID control is different depending on the setting of the
FRHI¿FLHQWĮDQGȕ
:KHQ WKH FRHIILFLHQW Į DQG FRHIILFLHQW ȕ WKH V\VWHP SHUIRUPV WKH QRUPDO 3,'
control.
<RXFDQDGMXVWWKHFRHI¿FLHQWĮDQGȕDVIROORZV
6HWWKHFRHI¿FLHQWĮWRDQGȕWRIDFWRU\GHIDXOWVHWWLQJ
2) Perform a control to check the response (small overshoot).
,IRYHUVKRRWLVQRWUHGXFHGE\WKLVPHDVXUHDGMXVWWKHFRHI¿FLHQWĮDQGȕLQDFFRUGDQFHZLWKWKH
IROORZLQJWDEOH
:HUHFRPPHQG\RXWR¿[WKHFRHI¿FLHQWĮWREHFDXVHLWXVXDOO\UHTXLUHVQRDGMXVWPHQW
Control result
&RHI¿FLHQWȕ
FRHI¿FLHQWĮ
/DUJHRYHUVKRRW
5DLVHFRHI¿FLHQWȕE\
/RZHUFRHI¿FLHQWĮE\
Small overshoot
/RZHUFRHI¿FLHQWȕE\
5DLVHFRHI¿FLHQWĮE\
Setting 2-degrees-of-freedom PID control
Display the system menu ("
").
Display the control parameter ("
") and choose 2-degrees-of-freedom PID ("
").
Press the
key to set the value.
$XWRWXQLQJ
Run auto-tuning to set the PID parameter automatically.
"
" set value
Behavior
Function
"
"
Stop/Finish
6WRSVRU¿QLVKHVDXWRWXQLQJ
"
"
Normal type
The standard auto-tuning for SV reference. Choose this auto-tuning in most
situations.
"
"
/RZ39W\SH
$XWRWXQLQJIRU69UHIHUHQFH&KRRVHWKLVZKHQ\RXZDQWWRVXSSUHVV
WKHRYHUVKRRWZKHQWXQLQJ
PV
t
process
value
AT start
AT calculating
PID control
SV
SV-10%FS
PV
t
process
value
AT start
AT calculating
PID control
SV
Ɣ1RUPDOW\SH
Ɣ/RZ39W\SH
Point
6HWWKHIROORZLQJSDUDPHWHUVEHIRUHUXQQLQJDXWRWXQLQJ
Ɣ 39LQSXWW\SH39LQSXWXSSHUOLPLW39LQSXWORZHUOLPLW'HFLPDOSRVLWLRQ39LQSXW
filter in the setup channel menu ("
")
Ɣ 287SURSRUWLRQF\FOH287SURSRUWLRQF\FOHLQWKH3,'FKDQQHOPHQX
").
1
2
3
1
2
3
Running auto-tuning
Display auto-tuning ("
") and choose the tuning type.
Choose the standard type ("
RUORZ39W\SH
") according to the control target
Press the
key to start auto-tuning.
$7ODPSZLOOEOLQNDWWKHERWWRPRIWKHGLVSOD\GXULQJDXWRWXQLQJ
:KHQDXWRWXQLQJKDVVXFFHVVIXOO\FRPSOHWHGEOLQNLQJ$7ODPSZLOOWXUQRIIDQGRYHUZULWHVWKH
PID.
Point
Ɣ 3,'SDUDPHWHUZKLFKLVVHWDIWHUDXWRWXQLQJKDVILQLVKHGQRUPDOO\
ZLOOEHPDLQWDLQHGHYHQZKHQWKHSRZHULVWXRZHYHUWKH3,'YDOXHZLOOQRWEH
FKDQJHGLIWKHSRZHULVWXUQHGRIIGXULQJDXWRWXQLQJ,QWKLVFDVHUHUXQDXWRWXQLQJ
Ɣ 7KHHTXLSPHQWZLOOXVH212))SRVLWLRQFRQWUROGXULQJDXWRWXQLQJVRWKHUHPD\
be a large change in PV according to the process. Do not use auto-tuning for processes
that do not permit a large change in PV. Do not use auto-tuning for processes such as
SUHVVXUHFRQWURODQGIORZFRQWUROWKDWKDYHDIDVWUHVSRQVH
Ɣ $XWRWXQLQJLVQRWEHKDYLQJQRUPDOO\LILWKDVQRWILQLVKHGDIWHUIRXURUPRUHKRXUVKDYH
SDVVHG,QWKHVHFDVHVUHFKHFNSDUDPHWHUVVXFKDVLQSXWRXWSXWZLULQJFRQWURORXWSXW
behavior (normal/ reverse), and input sensor type.
Ɣ 5HUXQDXWRWXQLQJLIWKHUHLVDODUJHFKDQJHLQ69DFKDQJHLQWKH39LQSXWW\SHRUD
change in the control target conditions that reduces the effectiveness of the controls.
Ɣ <RXFDQUXQDXWRWXQLQJZKHQWKHFRQWUROW\SHLVVHWWRIX]]\RU3,'
Ɣ <RXFDQQRWUXQDXWRWXQLQJLQPDQXDOPRGH
Ɣ :KHQXVLQJWKH3,'VHOHFWLRQIXQFWLRQWKHDXWRWXQLQJUHVXOWIRUWKHVHOHFWHG3,'JURXS
is stored.
Ɣ $XWRWXQLQJLVIRUFLEO\WHUPLQDWHGZKHQ69FKDQJHVEHFDXVHRIWKHUDPSVRDNIXQFWLRQ
remote SV function, or ramp SV.
0DQXDO2XWSXW
$OORZVWKHFRQWURORXWSXWWREHPDQXDOO\VHWDWDQDUELWUDU\YDOXH
Ɣ0DQXDO0RGH'LVSOD\
MV indiator lights during manual mode and during parameter setting.
Ɣ6ZLWFKRYHUEHWZHHQ$XWRDQG0DQXDO
Modes can be changed by three methods: the front key (user key), communication function, or the
parameter "
".
Ɣ09RXWSXWÀRZGLDJUDP09RXWSXWSULRULW\SURFHVVLQJ
MV
MV1
MV2
MV1
MV2
MV limit
PID
calculation
output
setting
during
FALT
Soft start
limit
Specify
standby
MV output
manual
MV output
parameter
“MAN”
Dual
calculation
OFF
ON
Caution
Ɣ 09OLPLWGRHVQRWDSSO\WRWKH09RXWSXWGXULQJPDQXDORSHUDWLRQ)$/7RUVWDQGE\
7DNHH[WUDFDXWLRQZKHQ09SHUIRUPVIODVKSURWHFWLRQGXULQJFRPEXVWLRQFRQWUROE\
using the overlimit function.)
5DPS6RDN)XQFWLRQ
Automatically runs after setting the times for the SV changes.
<RXFDQFKRRVHXSWRVWHSVIRUWKH69VHWWLQJDQGW\SHVRIUDPSVRDNRSHUDWLRQSDWWHUQV
SV-1
SV-2
SV-3
SV-4
SV-5
SV-7
SV-8
time
TM1r
PV
TM1s
TM5r
TM5s
TM16r
TM16s
VWHSWRSDWWHUQ
SV-9
69
SV-12
SV-13
SV-14
SV-15
SV-16
SV-11
SV-6
VWHSWRSDWWHUQ
VWHSWRSDWWHUQ
VWHSWRSDWWHUQ
VWHSWRSDWWHUQ
VWHSWRSDWWHUQ
VWHSWRSDWWHUQ
SV
step1
step2
step3
Caution
Ɣ :KHQXVLQJWKHV\VWHPLQWKHUHVWRUHPRGH
FRQWLQXH
") in the ramp/
soak menu ("
"), do not set the ramp/soak control command ("
") of the
operation menu to hold ("
") during the ramp period at the beginning of the pattern.
Ɣ :KHQ39VWDUW
") of the ramp/soak menu ("
") is on ("
"), set the pattern
parameter ("
") of ramp/soak ("
) to "
VHWWLQJWKDWVWDUWVZLWK
seg ramp).
Ɣ 'RQRWVHWWKH6WDUWXSPRGH
VWDQGE\PRGH
") of the sys- tem menu
("
") and the restore mode ("
FRQWLQXH
") of the ramp/soak menu
("
") at the same time.
1
2
- 15 -
