JPS57109057A - Automatic switching system of dual-processor system - Google Patents

Automatic switching system of dual-processor system

Info

Publication number
JPS57109057A
JPS57109057A JP55188416A JP18841680A JPS57109057A JP S57109057 A JPS57109057 A JP S57109057A JP 55188416 A JP55188416 A JP 55188416A JP 18841680 A JP18841680 A JP 18841680A JP S57109057 A JPS57109057 A JP S57109057A
Authority
JP
Japan
Prior art keywords
timers
processor
fault
processors
dual
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
JP55188416A
Other languages
Japanese (ja)
Inventor
Kenji Hiramine
Reijiro Aoki
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.)
Omron Corp
Original Assignee
Tateisi Electronics Co
Omron Tateisi Electronics Co
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 Tateisi Electronics Co, Omron Tateisi Electronics Co filed Critical Tateisi Electronics Co
Priority to JP55188416A priority Critical patent/JPS57109057A/en
Publication of JPS57109057A publication Critical patent/JPS57109057A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements

Abstract

PURPOSE:To facilitate the processing of a switching controller by detecting a fault of a processor by monitoring the states of two timers, by providing the switching controller with two timers which are set at constant intervals of time by two processors and generate fault detection signals when not set. CONSTITUTION:The bus switching gate 42 is connected to two processors through internal buses 37 and 38, and consequently the internal buses 37 and 38 are switched and connected to an external bus 39. Those buses 37 and 38 are provided with timers T1 and T2 which are set at constant intervals of time by the processors and supply fault signals to a monitoring device 41 when not set. This monitoring device 41 monitors signals from the timers T1 and T2 and, when detecting a fault of a processor, controls the switching gate 42 to change connections between the internal buses 37 and 38, and external bus 38, thus simplifying the processing of the switching controller.
JP55188416A 1980-12-26 1980-12-26 Automatic switching system of dual-processor system Pending JPS57109057A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55188416A JPS57109057A (en) 1980-12-26 1980-12-26 Automatic switching system of dual-processor system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55188416A JPS57109057A (en) 1980-12-26 1980-12-26 Automatic switching system of dual-processor system

Publications (1)

Publication Number Publication Date
JPS57109057A true JPS57109057A (en) 1982-07-07

Family

ID=16223272

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55188416A Pending JPS57109057A (en) 1980-12-26 1980-12-26 Automatic switching system of dual-processor system

Country Status (1)

Country Link
JP (1) JPS57109057A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6043784A (en) * 1983-08-19 1985-03-08 Fujitsu Ltd Double processor system
JPS6180348A (en) * 1984-09-27 1986-04-23 Mitsubishi Electric Corp Bus switching device
JPS61134846A (en) * 1984-12-04 1986-06-21 Omron Tateisi Electronics Co Electronic computer system
JPS62204346A (en) * 1986-03-05 1987-09-09 Hitachi Ltd Duplex system switching system
JPH02109144A (en) * 1988-10-18 1990-04-20 Omron Tateisi Electron Co Transmission line switching device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6043784A (en) * 1983-08-19 1985-03-08 Fujitsu Ltd Double processor system
JPH0519743B2 (en) * 1983-08-19 1993-03-17 Fujitsu Ltd
JPS6180348A (en) * 1984-09-27 1986-04-23 Mitsubishi Electric Corp Bus switching device
JPS61134846A (en) * 1984-12-04 1986-06-21 Omron Tateisi Electronics Co Electronic computer system
JPS62204346A (en) * 1986-03-05 1987-09-09 Hitachi Ltd Duplex system switching system
JPH02109144A (en) * 1988-10-18 1990-04-20 Omron Tateisi Electron Co Transmission line switching device

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