JPS5680702A - Backup system of sequence controller - Google Patents

Backup system of sequence controller

Info

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
Application number
JP15797379A
Other languages
Japanese (ja)
Inventor
Itaru Tanimoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP15797379A priority Critical patent/JPS5680702A/en
Publication of JPS5680702A publication Critical patent/JPS5680702A/en
Pending legal-status Critical Current

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
JP15797379A 1979-12-07 1979-12-07 Backup system of sequence controller Pending JPS5680702A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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