JPS6464001A - Controller - Google Patents
ControllerInfo
- Publication number
- JPS6464001A JPS6464001A JP22020587A JP22020587A JPS6464001A JP S6464001 A JPS6464001 A JP S6464001A JP 22020587 A JP22020587 A JP 22020587A JP 22020587 A JP22020587 A JP 22020587A JP S6464001 A JPS6464001 A JP S6464001A
- Authority
- JP
- Japan
- Prior art keywords
- control
- signal
- lifetime
- given
- value
- 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.)
- Pending
Links
Landscapes
- Feedback Control In General (AREA)
Abstract
PURPOSE:To properly control of the lifetime of a control valve serving as a control terminal by adding a limiting circuit to limit the controlled variable of the control terminal. CONSTITUTION:A valve minimum opening limiting circuit 7 is set between a control part 6 and a control signal output part 8. A target control signal D3 is calculated as an input by a control part 6 based on the actual difference value between the process value (value to be controlled) 2 and the target value 1. Then the proper correction is applied to the signal D3 in accordance with the cases that the serious consideration is given to the controllability or to the lifetime of a control valve serving as a control terminal. Thus a control signal D'4 is outputted. In other words, the limit range is reduced for output of the signal D3 when the preference is given to the controllability. While said limit range is increased when the preference is given to the lifetime of the control valve.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22020587A JPS6464001A (en) | 1987-09-04 | 1987-09-04 | Controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22020587A JPS6464001A (en) | 1987-09-04 | 1987-09-04 | Controller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6464001A true JPS6464001A (en) | 1989-03-09 |
Family
ID=16747534
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22020587A Pending JPS6464001A (en) | 1987-09-04 | 1987-09-04 | Controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6464001A (en) |
-
1987
- 1987-09-04 JP JP22020587A patent/JPS6464001A/en active Pending
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