JPS648410A - Monitor device for sequence program control system - Google Patents

Monitor device for sequence program control system

Info

Publication number
JPS648410A
JPS648410A JP62164660A JP16466087A JPS648410A JP S648410 A JPS648410 A JP S648410A JP 62164660 A JP62164660 A JP 62164660A JP 16466087 A JP16466087 A JP 16466087A JP S648410 A JPS648410 A JP S648410A
Authority
JP
Japan
Prior art keywords
storing
storing part
abnormality
monitored
abnormal element
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.)
Granted
Application number
JP62164660A
Other languages
Japanese (ja)
Other versions
JP2590108B2 (en
Inventor
Yukio Munenaga
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.)
Mazda Motor Corp
Original Assignee
Mazda Motor Corp
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 Mazda Motor Corp filed Critical Mazda Motor Corp
Priority to JP62164660A priority Critical patent/JP2590108B2/en
Publication of JPS648410A publication Critical patent/JPS648410A/en
Application granted granted Critical
Publication of JP2590108B2 publication Critical patent/JP2590108B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Landscapes

  • Testing And Monitoring For Control Systems (AREA)
  • Programmable Controllers (AREA)

Abstract

PURPOSE:To synchronously maintain both working and storing patterns and to search the cause of facility stop by storing the existence of abnormality on the basis of the change of an element and comparison with a normal pattern, excluding an abnormal element from an object to the monitored and controlling the restoration of the abnormal element to the object to be monitored in accordance with the state of the succeeding step. CONSTITUTION:The changes of respective elements in respective steps of sequence control are detected by a change detecting part 3, each change is compared with a corresponding pattern extracted from a normal pattern storing part 4 by a comparing part 5, the existence of abnormality is decided by a diagnosis processing part 7 and the decided result is stored in an abnormality history storing part 9 and an abnormality history storing part 10 for one past cycle. The abnormal element is excluded from the object to be monitored on the basis of the contents of the storing part 10. The monitoring of the abnormal element is restored from a step coincident with the normal pattern out of the step changing the pattern obtained from the storing part 4 and the succeeding step. Consequently, synchronism between the working and storing patterns can be maintained and the cause of facility stop can be accurately searched from the contents of the storing part 9.
JP62164660A 1987-06-30 1987-06-30 Monitor for sequence program control system Expired - Lifetime JP2590108B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62164660A JP2590108B2 (en) 1987-06-30 1987-06-30 Monitor for sequence program control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62164660A JP2590108B2 (en) 1987-06-30 1987-06-30 Monitor for sequence program control system

Publications (2)

Publication Number Publication Date
JPS648410A true JPS648410A (en) 1989-01-12
JP2590108B2 JP2590108B2 (en) 1997-03-12

Family

ID=15797390

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62164660A Expired - Lifetime JP2590108B2 (en) 1987-06-30 1987-06-30 Monitor for sequence program control system

Country Status (1)

Country Link
JP (1) JP2590108B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02267602A (en) * 1989-04-07 1990-11-01 Mitsubishi Electric Corp Sequence controller

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50108483A (en) * 1974-02-05 1975-08-26
JPS53148679A (en) * 1977-05-30 1978-12-25 Toshiba Corp Sequncing control system for plant
JPS6275719A (en) * 1985-09-30 1987-04-07 Nippon Atom Ind Group Co Ltd Generation method for abnormal time disposal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50108483A (en) * 1974-02-05 1975-08-26
JPS53148679A (en) * 1977-05-30 1978-12-25 Toshiba Corp Sequncing control system for plant
JPS6275719A (en) * 1985-09-30 1987-04-07 Nippon Atom Ind Group Co Ltd Generation method for abnormal time disposal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02267602A (en) * 1989-04-07 1990-11-01 Mitsubishi Electric Corp Sequence controller

Also Published As

Publication number Publication date
JP2590108B2 (en) 1997-03-12

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