JPS6148161B2 - - Google Patents
Info
- Publication number
- JPS6148161B2 JPS6148161B2 JP18126880A JP18126880A JPS6148161B2 JP S6148161 B2 JPS6148161 B2 JP S6148161B2 JP 18126880 A JP18126880 A JP 18126880A JP 18126880 A JP18126880 A JP 18126880A JP S6148161 B2 JPS6148161 B2 JP S6148161B2
- Authority
- JP
- Japan
- Prior art keywords
- output
- manual
- proportional
- value
- hold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000004886 process control Methods 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012369 In process control Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010965 in-process control Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B7/00—Arrangements for obtaining smooth engagement or disengagement of automatic control
- G05B7/02—Arrangements for obtaining smooth engagement or disengagement of automatic control electric
Description
【発明の詳細な説明】
本発明は、比例または比例微分動作を行うプロ
セス制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a process control device that performs proportional or proportional differential operation.
一般に比例または比例微分動作を行うプロセス
制御装置においては、制御演算部からの比例また
は比例微分演算出力に手動設定によるバイアス値
を加算してオフセツトのない比例または比例微分
動作を行うようになつている。そしてこのような
プロセス制御装置においても、手動調節状態から
自動調節状態への切換えは制御偏差があつてもバ
ンプレスにできるように構成されており、その一
例を第１図に示す。第１図において、１は制御演
算部で、測定値PVと設定値SVとの制御偏差ｅに
比例ゲインKPで決る比例演算を施す比例演算要
素Ｐからなるようが示されている。２は出力バイ
アス値Ｂを手動設定する回路で、ポテンシヨメー
タが示されている。３は制御演算部１の出力ＹA
（＝KPe）と出力バイアス値Ｂとを加算する第１
の加算器、４は第１の加算器３の出力（KPe＋
Ｂ）と後述する時定数回路８の出力Ｉとを加算す
る第２加算器、５は手動調節信号ＹMを出力する
手動調節回路、６は手動調節回路出力ＹMと第２
の加算器４の出力（ＹA＋Ｂ＋Ｉ）とを切換えて
操作出力MVとする手動自動切換スイツチ、７は
操作出力MVと第１の加算器出力（ＹA＋Ｂ）と
の減算を行う減算器である。時定数回路８は、コ
ンデンサＣと抵抗R1，R2および手動・自動切換
スイツチ６と連動して切換わるスイツチSWとか
らなつており、手動調節時にはSWがＭ側に接続
され減算器出力（MV―ＹA―Ｂ）をコンデンサ
Ｃに蓄え、自動調節時にはSWがＡ側に接続され
てコンデンサＣに蓄えられた電荷を抵抗R1，R2
を介しててＣ（R1＋R2）なる時定数で放電するも
のである。なおその時定数は可変抵抗R2で設定
できる。このような構成において、手動調節時に
は時定数回路８に手動調節信号ＹMと、制御演算
部出力ＹAおよび出力バイアス値Ｂで決るＹM―Ｙ
A―Ｂなる値が加えられている。そして第２の加
算器４の出力は第１の加算器出力（ＹA＋Ｂ）と
時定数回路出力（ＹM―ＹA―Ｂ）との和であるの
で、常に手動調節信号ＹMをトラツキングしてい
る。したがつて手動・自動切換スイツチ６を手動
側Ｍから自動側Ａに切換えても操作出力MVはな
んら変動せず、バンプレス切換えができる。その
後時定数回路８のコンデンサＣに蓄えられた電荷
がＣ（R1＋R2）なる時定数で徐々に放電するの
で、最終的に自動調節時の操作出力MVはＹA＋
Ｂ（＝KPeB）となり、所望の比例動作に移行す
るようになつている。このように従来装置では、
出力バイアス値を手動で設定するためのポテンシ
ヨメータ等の設定回路２の他に、手動調節状態か
ら自動調節状態へバンプレス切換えを行うための
時定数回路８を必要とし、しかも自動調節時に時
定数回路出力を零に近づけるための時定数の設定
も行なわなければならず操作も面倒であつた。 Generally, in process control equipment that performs proportional or proportional differential operation, a manually set bias value is added to the proportional or proportional differential calculation output from the control calculation section to perform proportional or proportional differential operation without offset. . Even in such a process control device, the switching from the manual adjustment state to the automatic adjustment state is configured to be bumpless even if there is a control deviation, an example of which is shown in FIG. In FIG. 1, reference numeral 1 denotes a control calculation section, which is shown to be composed of a proportional calculation element P that performs a proportional calculation determined by a proportional gain KP on the control deviation e between the measured value PV and the set value SV. 2 is a circuit for manually setting the output bias value B, and a potentiometer is shown. 3 is the output Y A of the control calculation section 1
(=KPe) and the output bias value B are added together.
4 is the output of the first adder 3 (KPe+
5 is a manual adjustment circuit that outputs a manual adjustment signal Y M ; 6 is a manual adjustment circuit that outputs the manual adjustment circuit output Y M and the second adder.
A manual automatic changeover switch which switches between the output (Y A + B + I) of the adder 4 and sets it as the manipulated output MV, and 7 is a subtracter that subtracts the manipulated output MV and the first adder output (Y A + B). be. The time constant circuit 8 consists of a capacitor C, resistors R 1 and R 2 , and a switch SW that switches in conjunction with the manual/automatic changeover switch 6. During manual adjustment, the SW is connected to the M side and the subtracter output ( MV-Y A -B) is stored in capacitor C, and during automatic adjustment, SW is connected to the A side and the charge stored in capacitor C is transferred to resistors R 1 and R 2
It discharges with a time constant of C(R 1 +R 2 ). Note that the time constant can be set using variable resistor R2 . In such a configuration, during manual adjustment, the time constant circuit 8 receives the manual adjustment signal Y M and Y M -Y determined by the control calculation section output Y A and the output bias value B.
The value A - B is added. Since the output of the second adder 4 is the sum of the first adder output (Y A +B) and the time constant circuit output (Y M -Y A -B), the manual adjustment signal Y M is always tracked. are doing. Therefore, even if the manual/automatic changeover switch 6 is switched from the manual side M to the automatic side A, the operating output MV does not change at all, and bumpless switching is possible. Thereafter, the electric charge stored in the capacitor C of the time constant circuit 8 is gradually discharged with a time constant of C (R 1 + R 2 ), so the operation output MV during automatic adjustment is finally Y A +
B (=KPeB), and the transition to the desired proportional operation is made. In this way, with conventional equipment,
In addition to the setting circuit 2 such as a potentiometer for manually setting the output bias value, a time constant circuit 8 is required for bumpless switching from the manual adjustment state to the automatic adjustment state. It is also necessary to set a time constant in order to bring the constant circuit output close to zero, which is cumbersome to operate.
本発明は、ホールド回路を用いて、手動調節時
に手動調節信号と制御演算部からの演算出力との
をホールドしておき、自動調節時に手動操作によ
りホールド値を調整してバイアス値を手動設定す
るようにして、手動調節から自動調節への切換え
をバンプレスにできる比例または比例微分動作を
なうプロセス制御装置を簡単な構成で実現したも
のである。 The present invention uses a hold circuit to hold the manual adjustment signal and the calculation output from the control calculation section during manual adjustment, and adjusts the hold value by manual operation during automatic adjustment to manually set the bias value. In this way, a process control device having a proportional or proportional differential operation that can switch from manual adjustment to automatic adjustment without bumping is realized with a simple configuration.
すなわち本発明は第２図の実施例に示すよう
に、手動調節時にスイツチSWをオン（Ｍ側）に
して手動調節信号ＹMと制御演算出力ＹAの差をホ
ールド回路９に加え、自動調節時にスイツチSW
をオフ（Ａ側）にするとともにホールド回路９の
ホールド値（ＹM―ＹA）を出力バイアス値Ｂとし
て制御演算出力ＹAに加算するようにしたもので
ある。したがつて手動調節から自動調節へ切換え
たときの操作出力MVは制御演算出力ＹA（＝
KPe）とホールド回路出力Ｂ（＝ＹM―ＹA）の和
であるから、手動調節時の出力と同じになり何ん
ら変動せず、制御偏差ｃがあつてもバンプレスの
切換えができる。 That is, as shown in the embodiment of FIG. 2, the present invention turns on the switch SW (to the M side) during manual adjustment, adds the difference between the manual adjustment signal Y M and the control calculation output Y A to the hold circuit 9, and performs automatic adjustment. sometimes switch SW
is turned off (to the A side), and the hold value (Y M -Y A ) of the hold circuit 9 is added as the output bias value B to the control calculation output Y A. Therefore, the manipulated output MV when switching from manual adjustment to automatic adjustment is the control calculation output Y A (=
KPe) and hold circuit output B (= Y M - Y A ), it is the same as the output during manual adjustment and does not fluctuate at all, allowing bumpless switching even if there is a control deviation c. .
そしてホールド回路９のホールド値すなわちバ
イアス値Ｂは、自動調節時にホールド回路９の入
力側に正の電圧＋Ｅまたは負の電圧―Ｅを選択的
に加えるホールド値調整手段１０により増減でき
るようにしてある。これによつて、手動調節時に
ＹM―ＫPｅなる値に決めたバイアス値Ｂが自動調
節へ切換えたとき最適な値にならず、オフセツト
が消えない場合があつても、自動調節時にバイア
ス値Ｂを最適な値に調整できる。 The hold value, that is, the bias value B of the hold circuit 9 can be increased or decreased by a hold value adjusting means 10 that selectively applies a positive voltage +E or a negative voltage -E to the input side of the hold circuit 9 during automatic adjustment. . As a result, even if the bias value B determined to be Y M - K P e during manual adjustment does not become the optimal value when switching to automatic adjustment and the offset does not disappear, the bias value B during automatic adjustment Value B can be adjusted to the optimal value.
なお上述では、制御演算部１として比例演算を
行う場合を例示したが、第３図に示すように微分
演算要素Ｄを追加すれば比例微分演算ができる。 In the above description, a case where proportional calculation is performed as the control calculation section 1 has been illustrated, but if a differential calculation element D is added as shown in FIG. 3, proportional differential calculation can be performed.
第１図は従来装置の一例を示すブロツク線図、
第２図は本発明装置の一実施例を示すブロツク線
図、第３図および第４図は本発明装置の他の実施
例を示すブロツク線図である。
１……制御演算部、２……バイアス値設定回
路、３，４……加算器、５……手動調節回路、６
……手動・自動切換スイツチ、７……減算器、８
……時定数回路、９……ホールド回路、１０……
ホールド値調整手段、１１……出力レジスタ。
FIG. 1 is a block diagram showing an example of a conventional device.
FIG. 2 is a block diagram showing one embodiment of the apparatus of the present invention, and FIGS. 3 and 4 are block diagrams showing other embodiments of the apparatus of the present invention. 1... Control calculation unit, 2... Bias value setting circuit, 3, 4... Adder, 5... Manual adjustment circuit, 6
...Manual/automatic changeover switch, 7...Subtractor, 8
...Time constant circuit, 9...Hold circuit, 10...
Hold value adjustment means, 11...output register.
Claims (1)
を行うプロセス制御装置において、制御演算部か
らの比例または比例微分演算出力とホールド回路
のホールド値とを加算する加算器と、この加算器
の出力と手動調節信号とを切換えて操作出力とす
る手動・自動切換スイツチと、前記操作出力と前
記制御演算部からの演算出力との減算を行う減算
器と、前記手動・自動切換スイツチと連動して切
換わり、手動調節時に前記減算器の出力を前記ホ
ールド回路に加えるスイツチと、自動調節時に前
記ホールド回路のホールド値を手動操作により調
整する手段とを具え、前記ホールド回路のホール
ド値を出力バイアス値としたことを特徴とするプ
ロセス制御装置。1. In a process control device that performs proportional or proportional differential operation with an output bias value, there is an adder that adds the proportional or proportional differential operation output from the control operation section and the hold value of the hold circuit, and the output of this adder and the manual a manual/automatic changeover switch that switches between the control signal and the control signal as a manipulated output; a subtractor that subtracts the manipulated output from the calculated output from the control calculation section; and a subtracter that switches in conjunction with the manual/automatic changeover switch. , comprising a switch that applies the output of the subtracter to the hold circuit during manual adjustment, and means for manually adjusting the hold value of the hold circuit during automatic adjustment, and the hold value of the hold circuit is set as an output bias value. A process control device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18126880A JPS57105004A (en) | 1980-12-23 | 1980-12-23 | Process control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18126880A JPS57105004A (en) | 1980-12-23 | 1980-12-23 | Process control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57105004A JPS57105004A (en) | 1982-06-30 |
| JPS6148161B2 true JPS6148161B2 (en) | 1986-10-23 |
Family
ID=16097718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18126880A Granted JPS57105004A (en) | 1980-12-23 | 1980-12-23 | Process control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57105004A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0263372U (en) * | 1988-10-27 | 1990-05-11 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60158201U (en) * | 1984-03-29 | 1985-10-21 | 横河電機株式会社 | process control equipment |
| JPH0367302A (en) * | 1989-08-04 | 1991-03-22 | Mitsubishi Electric Corp | Auto-tuning controller |
-
1980
- 1980-12-23 JP JP18126880A patent/JPS57105004A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0263372U (en) * | 1988-10-27 | 1990-05-11 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57105004A (en) | 1982-06-30 |
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