JPS5486081A - Redundancy system of digital controller system - Google Patents
Redundancy system of digital controller systemInfo
- Publication number
- JPS5486081A JPS5486081A JP15286177A JP15286177A JPS5486081A JP S5486081 A JPS5486081 A JP S5486081A JP 15286177 A JP15286177 A JP 15286177A JP 15286177 A JP15286177 A JP 15286177A JP S5486081 A JPS5486081 A JP S5486081A
- Authority
- JP
- Japan
- Prior art keywords
- station
- loop
- control
- control station
- disorder
- 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
- Control By Computers (AREA)
- Safety Devices In Control Systems (AREA)
Abstract
PURPOSE: To minimize spreading effect caused by the disorder of system by providing two loop stations actuating as the primary and the secondary with respect to the same control loop by exchanging from the primary to the secondary for the abnormal condition.
CONSTITUTION: Main loop station 16 takes in the detecting value PV with the control of control station to produce the operation power MV. The transmission between the loop station and control station is operated through the analog bus 11 and digital bus 12. The control station controls concurrently the secondary control station 17, by which the outputs of both stations are followed-up. Now, with the disorder of the main station, the relay is actuated to change the secondary loop station by actuating the switch 19.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15286177A JPS5486081A (en) | 1977-12-21 | 1977-12-21 | Redundancy system of digital controller system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15286177A JPS5486081A (en) | 1977-12-21 | 1977-12-21 | Redundancy system of digital controller system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5486081A true JPS5486081A (en) | 1979-07-09 |
Family
ID=15549717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15286177A Pending JPS5486081A (en) | 1977-12-21 | 1977-12-21 | Redundancy system of digital controller system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5486081A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0399302A (en) * | 1989-09-05 | 1991-04-24 | Honeywell Inc | Process controller |
JPH03156602A (en) * | 1989-11-15 | 1991-07-04 | Hitachi Ltd | Method and device for control of plant |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4912747A (en) * | 1972-05-12 | 1974-02-04 | ||
JPS5183978A (en) * | 1975-01-20 | 1976-07-22 | Hitachi Ltd |
-
1977
- 1977-12-21 JP JP15286177A patent/JPS5486081A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4912747A (en) * | 1972-05-12 | 1974-02-04 | ||
JPS5183978A (en) * | 1975-01-20 | 1976-07-22 | Hitachi Ltd |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0399302A (en) * | 1989-09-05 | 1991-04-24 | Honeywell Inc | Process controller |
JPH03156602A (en) * | 1989-11-15 | 1991-07-04 | Hitachi Ltd | Method and device for control of plant |
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