JPS6484312A - Controller abnormality diagnosing system - Google Patents

Controller abnormality diagnosing system

Info

Publication number
JPS6484312A
JPS6484312A JP62243163A JP24316387A JPS6484312A JP S6484312 A JPS6484312 A JP S6484312A JP 62243163 A JP62243163 A JP 62243163A JP 24316387 A JP24316387 A JP 24316387A JP S6484312 A JPS6484312 A JP S6484312A
Authority
JP
Japan
Prior art keywords
failure
value
controller
detected
misswitching
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
JP62243163A
Other languages
Japanese (ja)
Other versions
JP2647392B2 (en
Inventor
Akinori Natsume
Isao Takami
Tadashi Nakao
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP62243163A priority Critical patent/JP2647392B2/en
Publication of JPS6484312A publication Critical patent/JPS6484312A/en
Application granted granted Critical
Publication of JP2647392B2 publication Critical patent/JP2647392B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Testing And Monitoring For Control Systems (AREA)
  • Safety Devices In Control Systems (AREA)

Abstract

PURPOSE:To remove misdiagnosis or misswitching by changing conditions and detecting a sudden failure case of a controller and its sow failure case in normal service. CONSTITUTION:Comparing/deciding devices 21, 22 compare and decide the absolute value of a difference between the output of a normal system controller and that of a waiting system controller with deviation set values 1, 2 and output deceding signals s31, s32 to an OR circuit 41 through timers 31, 32. A sudden failure is detected by a 1st condition setting up the set time T1 of the timer 31 to a short value and the deviation set value epsilon1 to a large value and a slow failure is detected by a 2nd condition setting up the deviation set value epsilon2 to a small value and the set time T2 of the timer 32 to a long value. Consequently, the failure of the controller over a wide range from the sudden failure to the slow failure can be quickly detected without sharply disturbing an object to be controlled and misdiagnosis or misswitching can be reduced.
JP62243163A 1987-09-28 1987-09-28 Controller abnormality diagnosis method Expired - Fee Related JP2647392B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62243163A JP2647392B2 (en) 1987-09-28 1987-09-28 Controller abnormality diagnosis method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62243163A JP2647392B2 (en) 1987-09-28 1987-09-28 Controller abnormality diagnosis method

Publications (2)

Publication Number Publication Date
JPS6484312A true JPS6484312A (en) 1989-03-29
JP2647392B2 JP2647392B2 (en) 1997-08-27

Family

ID=17099745

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62243163A Expired - Fee Related JP2647392B2 (en) 1987-09-28 1987-09-28 Controller abnormality diagnosis method

Country Status (1)

Country Link
JP (1) JP2647392B2 (en)

Also Published As

Publication number Publication date
JP2647392B2 (en) 1997-08-27

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees