JPS5680702A - Backup system of sequence controller - Google Patents
Backup system of sequence controllerInfo
- Publication number
- JPS5680702A JPS5680702A JP15797379A JP15797379A JPS5680702A JP S5680702 A JPS5680702 A JP S5680702A JP 15797379 A JP15797379 A JP 15797379A JP 15797379 A JP15797379 A JP 15797379A JP S5680702 A JPS5680702 A JP S5680702A
- Authority
- JP
- Japan
- Prior art keywords
- over
- data
- change
- arithmetic
- memory
- 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
- Programmable Controllers (AREA)
- Feedback Control In General (AREA)
- Safety Devices In Control Systems (AREA)
Abstract
PURPOSE: To continue control on the basis of correct data after the change-over of a change-over device that changing over sequence controllers, by providing a memory stored with data in process of arithmetic in the device.
CONSTITUTION: The sequence controller consists of CPUs 10 and 15 that execute sequence instructions, main memories 20 and 25 that hold programs composed of sequence instructions (or data in process of arithmetic), and input-output device 40 that provides external communication. One sequence controller, if running into trouble, is changed over to the other backup sequence controller by change-over device 30. Change-over device 30 is equipped with two memories 304 and 305, which are stored with data in process of arithmetic; one memory is coupled with the normal side, and the other with the backup side. Said memory 304 is stored with only data in process of correct arithmetic by CPU10, which is transferred to memory 305 and after the change-over operation, control is continued on the basis of this correct data.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15797379A JPS5680702A (en) | 1979-12-07 | 1979-12-07 | Backup system of sequence controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15797379A JPS5680702A (en) | 1979-12-07 | 1979-12-07 | Backup system of sequence controller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5680702A true JPS5680702A (en) | 1981-07-02 |
Family
ID=15661470
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15797379A Pending JPS5680702A (en) | 1979-12-07 | 1979-12-07 | Backup system of sequence controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5680702A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5814201A (en) * | 1981-07-20 | 1983-01-27 | Toshiba Corp | Bumpless backup device for sequence controller |
JPS599705A (en) * | 1982-07-09 | 1984-01-19 | Toshiba Corp | Plant operation control device |
JPS60238901A (en) * | 1984-05-11 | 1985-11-27 | Nec Corp | System switching system |
JP2003323209A (en) * | 2002-04-30 | 2003-11-14 | Mitsubishi Electric Corp | Process data monitoring device |
JP2008243212A (en) * | 2008-04-14 | 2008-10-09 | Toshiba Mitsubishi-Electric Industrial System Corp | Updating method for plant controller |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5028309A (en) * | 1973-07-11 | 1975-03-22 | ||
JPS5032848A (en) * | 1973-07-23 | 1975-03-29 | ||
JPS5141188A (en) * | 1974-10-03 | 1976-04-06 | Toyoda Machine Works Ltd | Shiikensukontoroora no kyuenseigyohoshiki |
JPS528282A (en) * | 1975-07-09 | 1977-01-21 | Hitachi Ltd | Input-output device of sequence controller |
-
1979
- 1979-12-07 JP JP15797379A patent/JPS5680702A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5028309A (en) * | 1973-07-11 | 1975-03-22 | ||
JPS5032848A (en) * | 1973-07-23 | 1975-03-29 | ||
JPS5141188A (en) * | 1974-10-03 | 1976-04-06 | Toyoda Machine Works Ltd | Shiikensukontoroora no kyuenseigyohoshiki |
JPS528282A (en) * | 1975-07-09 | 1977-01-21 | Hitachi Ltd | Input-output device of sequence controller |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5814201A (en) * | 1981-07-20 | 1983-01-27 | Toshiba Corp | Bumpless backup device for sequence controller |
JPS599705A (en) * | 1982-07-09 | 1984-01-19 | Toshiba Corp | Plant operation control device |
JPS60238901A (en) * | 1984-05-11 | 1985-11-27 | Nec Corp | System switching system |
JP2003323209A (en) * | 2002-04-30 | 2003-11-14 | Mitsubishi Electric Corp | Process data monitoring device |
JP2008243212A (en) * | 2008-04-14 | 2008-10-09 | Toshiba Mitsubishi-Electric Industrial System Corp | Updating method for plant controller |
JP4579307B2 (en) * | 2008-04-14 | 2010-11-10 | 東芝三菱電機産業システム株式会社 | Method for updating plant control device |
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