JPS55127652A - Mutual supervision system between computers - Google Patents

Mutual supervision system between computers

Info

Publication number
JPS55127652A
JPS55127652A JP3437479A JP3437479A JPS55127652A JP S55127652 A JPS55127652 A JP S55127652A JP 3437479 A JP3437479 A JP 3437479A JP 3437479 A JP3437479 A JP 3437479A JP S55127652 A JPS55127652 A JP S55127652A
Authority
JP
Japan
Prior art keywords
inquiry
cpu
computer
signals
coupler
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
JP3437479A
Other languages
Japanese (ja)
Other versions
JPS6048773B2 (en
Inventor
Akira Maruyama
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP54034374A priority Critical patent/JPS6048773B2/en
Publication of JPS55127652A publication Critical patent/JPS55127652A/en
Publication of JPS6048773B2 publication Critical patent/JPS6048773B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Hardware Redundancy (AREA)
  • Debugging And Monitoring (AREA)
  • Multi Processors (AREA)
  • Alarm Systems (AREA)

Abstract

PURPOSE: To prevent the operation of a system from getting abnormal on the whole by using as the method of exercising a mutual supervision between CPU's a common external memory unit stored with common data of a CPU system and making use of them for mutual processing, besides a computer coupler.
CONSTITUTION: From 1st computer CPU1 to 2nd computer CPU2 via computer coupler CLC, a fixed inquiry signal is sent at fixed intervals of time and in response to the inquiry signal, CPU2 sends a fixed answer signal back via coupler CLC. Then, a mutual supervision over whether CPU's 1 and 2 are in normal operation is exercised by judging whether the answer signal and inquiry signals have been inputted within the fixed time interval. To those CPU's 1 and 2 exercising the mutual supervision, common external memory unit GM is connected in common and this unit GM is stored with the inquiry and answer signals. Then when the inquiry and answer signals are sent out via coupler CLC, the signals stored in memory unit GM are read and used to prevent the operation of the system from becoming abnormal on the whole.
COPYRIGHT: (C)1980,JPO&Japio
JP54034374A 1979-03-26 1979-03-26 Mutual monitoring method between multiple computers Expired JPS6048773B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54034374A JPS6048773B2 (en) 1979-03-26 1979-03-26 Mutual monitoring method between multiple computers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54034374A JPS6048773B2 (en) 1979-03-26 1979-03-26 Mutual monitoring method between multiple computers

Publications (2)

Publication Number Publication Date
JPS55127652A true JPS55127652A (en) 1980-10-02
JPS6048773B2 JPS6048773B2 (en) 1985-10-29

Family

ID=12412387

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54034374A Expired JPS6048773B2 (en) 1979-03-26 1979-03-26 Mutual monitoring method between multiple computers

Country Status (1)

Country Link
JP (1) JPS6048773B2 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5958560A (en) * 1982-09-28 1984-04-04 Japanese National Railways<Jnr> Diagnosis system of data processor
JPS60247768A (en) * 1984-05-23 1985-12-07 Daihatsu Motor Co Ltd Multiprocessor system of automobile
JPS6182257A (en) * 1984-08-29 1986-04-25 Fujitsu Ltd Mutual monitoring system between host processor and communication control processor
JPS6224330A (en) * 1985-07-24 1987-02-02 Hitachi Ltd Fault detecting system for multi-processor
JPS6271755U (en) * 1985-10-19 1987-05-08
JPS62135950A (en) * 1985-12-09 1987-06-18 Fujitsu Ltd Fault state informing system
JPS62263598A (en) * 1986-05-12 1987-11-16 能美防災株式会社 Disaster prevention monitor/control equipment
JPH02214413A (en) * 1989-02-10 1990-08-27 Toshiba Corp System for monitoring digital protective relay
JPH0659989U (en) * 1993-12-17 1994-08-19 能美防災株式会社 Fire receiver
WO1995034026A1 (en) * 1994-06-08 1995-12-14 O & K Orenstein & Koppel Ag Control system for mobile machinery

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5958560A (en) * 1982-09-28 1984-04-04 Japanese National Railways<Jnr> Diagnosis system of data processor
JPS60247768A (en) * 1984-05-23 1985-12-07 Daihatsu Motor Co Ltd Multiprocessor system of automobile
JPS6182257A (en) * 1984-08-29 1986-04-25 Fujitsu Ltd Mutual monitoring system between host processor and communication control processor
JPS6224330A (en) * 1985-07-24 1987-02-02 Hitachi Ltd Fault detecting system for multi-processor
JPS6271755U (en) * 1985-10-19 1987-05-08
JPS62135950A (en) * 1985-12-09 1987-06-18 Fujitsu Ltd Fault state informing system
JPS62263598A (en) * 1986-05-12 1987-11-16 能美防災株式会社 Disaster prevention monitor/control equipment
JPH02214413A (en) * 1989-02-10 1990-08-27 Toshiba Corp System for monitoring digital protective relay
JPH0659989U (en) * 1993-12-17 1994-08-19 能美防災株式会社 Fire receiver
WO1995034026A1 (en) * 1994-06-08 1995-12-14 O & K Orenstein & Koppel Ag Control system for mobile machinery

Also Published As

Publication number Publication date
JPS6048773B2 (en) 1985-10-29

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