● After auto-tuning is completed, the respective optimal values are stored for proportional gain
[Kp], integral time [Ti], and derivative time [Td]. Before execution, it is necessary to specify
appropriate values (e.g. lower limits) within the respective setting ranges.
● After auto-tuning is complete, store optimal values for proportional gain [Kp], integral time
[Ti], and derivative time [Td]. Be careful that the stored values are not rewritten.
● During auto-tuning, the values for Kp, Ti and Td are calculated by measuring changes to
process values (PVs) when manipulated values (MVs) are set to the upper limits, as well as
changes to process values (PVs) when manipulated values (MVs) are set to the lower limits,
so that process values (PVs) will be increased or decreased in accordance with the
respective set point values (SPs).
● Changes to manipulated values (MVs) of auto-tuning are completed in three sessions (upper
limit output - lower limit output - upper limit output) in the fewest times possible. If the auto-
tuning progress does not change from 0 after multiple sessions, shorten the control interval
Ts and retry auto-tuning.
■
Overview of PID control
(1) Proportional operation
Control operation that produces an output proportional to the size of the input
Setting signal SV +
ー
Measurement signal PV
Deviation e
Kp
Output MV
e
1
0
t
MV
1
0
t
2
0.5
Kp=2
Kp=1
Kp=0.5
● A constant control quantity is maintained.
● Offset (steady-state deviation) remains.
● The larger the Kp value, the stronger the action of the proportional operation.
(2) Integral operation
Control operation that produces an output proportional to the integral time of the input.
10.11 PID (PID Operation)
10-42
WUME-FP7CPUPGR-12
Содержание FP7 Series
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Страница 61: ...Example 2 Use PSHS RDS or POPS instruction 2 1 Structure of Instructions WUME FP7CPUPGR 12 2 9 ...
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Страница 123: ...3 9 ANS AND stack WUME FP7CPUPGR 12 3 19 ...
Страница 125: ...3 10 ORS OR Stack WUME FP7CPUPGR 12 3 21 ...
Страница 129: ...3 11 PSHS Push stack RDS Read stack POPS Pop stack WUME FP7CPUPGR 12 3 25 ...
Страница 139: ...4 CNDE instruction 5 Step ladder instructions 6 Subroutine instructions 3 16 ALT Alternate out WUME FP7CPUPGR 12 3 35 ...
Страница 146: ... Application example of timer instructions serial connection of timers 3 17 TM Timer 3 42 WUME FP7CPUPGR 12 ...
Страница 147: ... Application example of timer instructions parallel connection of timers 3 17 TM Timer WUME FP7CPUPGR 12 3 43 ...
Страница 190: ...3 26 JP LBL Jump Label 3 86 WUME FP7CPUPGR 12 ...
Страница 239: ...Name Description SR8 ER 3 46 ST ST ST ST ST ST Data Comparison Start WUME FP7CPUPGR 12 3 135 ...
Страница 246: ... MEMO 3 142 WUME FP7CPUPGR 12 ...
Страница 251: ...Name Description SRA Depending on the comparison result SRB SRC 4 1 CMP Data Compare WUME FP7CPUPGR 12 4 5 ...
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Страница 277: ...F E D C B A 9 8 7 6 5 4 3 2 1 0 Digit 3 Digit 2 Digit 1 Digit 0 bit 5 8 DGT Digit Data Transfer WUME FP7CPUPGR 12 5 19 ...
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Страница 321: ...Name Description ER 6 7 DIVFP2 Division FP2 Compatible WUME FP7CPUPGR 12 6 17 ...
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Страница 1211: ...20 4 ASCII Code Table JIS8 Code Table Reference Table ASCII Codes 20 4 ASCII Code Table JIS8 Code Table WUME FP7CPUPGR 12 20 23 ...
Страница 1220: ... MEMO WUME FP7CPUPGR 12 ...
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