JPS6459401A - Deep layer protection type controller - Google Patents
Deep layer protection type controllerInfo
- Publication number
- JPS6459401A JPS6459401A JP21551987A JP21551987A JPS6459401A JP S6459401 A JPS6459401 A JP S6459401A JP 21551987 A JP21551987 A JP 21551987A JP 21551987 A JP21551987 A JP 21551987A JP S6459401 A JPS6459401 A JP S6459401A
- Authority
- JP
- Japan
- Prior art keywords
- control
- controllers
- accordance
- controller
- plural
- 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
- Safety Devices In Control Systems (AREA)
- Selective Calling Equipment (AREA)
Abstract
PURPOSE:To form the constitution of a control system as a deep layer, and to secure the safety of a plant by selecting an output of plural sets of independent controllers for sharing and executing plural control functions, in accordance with a priority of the control function, and outputting it as a control signal. CONSTITUTION:In a control system, the titled controller is constituted so that plural different control functions operated hierarchically in accordance with a state of a control object are shared by plural sets of independent controllers 4-1-4-4, and by an output part 16 provided separately, an output of these controllers is selected in accordance with a priority of the control function and outputted as a control signal. Since the controllers 4-1-4-4 are independent in each separate function, even if a fault is generated in a partial controller,a control of a different hierarchy by other controller is executed. In such a way, the system-down caused by a common event (common mode), can be prevented, and the safety and the reliability of a plant can be raised.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21551987A JPS6459401A (en) | 1987-08-31 | 1987-08-31 | Deep layer protection type controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21551987A JPS6459401A (en) | 1987-08-31 | 1987-08-31 | Deep layer protection type controller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6459401A true JPS6459401A (en) | 1989-03-07 |
Family
ID=16673758
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21551987A Pending JPS6459401A (en) | 1987-08-31 | 1987-08-31 | Deep layer protection type controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6459401A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008040998A (en) * | 2006-08-10 | 2008-02-21 | Yokogawa Electric Corp | Safe instrumentation system |
-
1987
- 1987-08-31 JP JP21551987A patent/JPS6459401A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008040998A (en) * | 2006-08-10 | 2008-02-21 | Yokogawa Electric Corp | Safe instrumentation system |
US8024053B2 (en) | 2006-08-10 | 2011-09-20 | Yokogawa Electric Corporation | Safety instrumentation system and plant safety system |
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