GB2251966B - Dual computer system - Google Patents

Dual computer system

Info

Publication number
GB2251966B
GB2251966B GB9204278A GB9204278A GB2251966B GB 2251966 B GB2251966 B GB 2251966B GB 9204278 A GB9204278 A GB 9204278A GB 9204278 A GB9204278 A GB 9204278A GB 2251966 B GB2251966 B GB 2251966B
Authority
GB
United Kingdom
Prior art keywords
processor
main system
dual
processor units
computer system
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.)
Expired - Lifetime
Application number
GB9204278A
Other versions
GB2251966A (en
GB9204278D0 (en
Inventor
Hajime Akai
Isao Domoto
Eiji Nakamoto
Yoshitugu Morioka
Shunsuke Hayashi
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.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Electric 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
Priority claimed from JP63090752A external-priority patent/JPH0682283B2/en
Priority claimed from JP63096172A external-priority patent/JPH01266633A/en
Priority claimed from JP63096171A external-priority patent/JPH01266634A/en
Priority claimed from JP63105064A external-priority patent/JPH0630070B2/en
Priority claimed from JP63109955A external-priority patent/JPH0621994B2/en
Application filed by Yokogawa Electric Corp filed Critical Yokogawa Electric Corp
Publication of GB9204278D0 publication Critical patent/GB9204278D0/en
Publication of GB2251966A publication Critical patent/GB2251966A/en
Application granted granted Critical
Publication of GB2251966B publication Critical patent/GB2251966B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • 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
    • G06F11/2097—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 maintaining the standby controller/processing unit updated
    • 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
    • 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
    • G06F11/202—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 where processing functionality is redundant
    • G06F11/2023—Failover techniques
    • 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
    • G06F11/202—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 where processing functionality is redundant
    • G06F11/2038—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 where processing functionality is redundant with a single idle spare processing component

Abstract

A dual computer system constituted of duplicated processor units (PC1, PC2) and a dual control unit (DXC) for controlling which side of the two processor units to keep operating (as a main system) or on standby (as subsidiary system). One processor acts in an actually operating state with the other on standby as a guard against a failure in the main system. The dual control unit controls which processor unit is to act for the main system through the medium of two internal independent interruption means (12L, 12R) for effecting switching of the main system and the subsidiary system selectively to the two processor units as a result of an interruption in one system. Such construction improves the continuity of the control at the time of switching. <IMAGE>
GB9204278A 1988-04-13 1992-02-28 Dual computer system Expired - Lifetime GB2251966B (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP63090752A JPH0682283B2 (en) 1988-04-13 1988-04-13 Redundant processor system
JP63096172A JPH01266633A (en) 1988-04-19 1988-04-19 Duplex control system
JP63096171A JPH01266634A (en) 1988-04-19 1988-04-19 Duplex control system
JP63105064A JPH0630070B2 (en) 1988-04-27 1988-04-27 Redundant control system
JP63109955A JPH0621994B2 (en) 1988-05-06 1988-05-06 Redundant control system

Publications (3)

Publication Number Publication Date
GB9204278D0 GB9204278D0 (en) 1992-04-08
GB2251966A GB2251966A (en) 1992-07-22
GB2251966B true GB2251966B (en) 1992-10-14

Family

ID=27525498

Family Applications (3)

Application Number Title Priority Date Filing Date
GB8904779A Expired - Lifetime GB2217487B (en) 1988-04-13 1989-03-02 Dual computer system
GB9204279A Expired - Lifetime GB2251967B (en) 1988-04-13 1992-02-28 Dual computer system
GB9204278A Expired - Lifetime GB2251966B (en) 1988-04-13 1992-02-28 Dual computer system

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB8904779A Expired - Lifetime GB2217487B (en) 1988-04-13 1989-03-02 Dual computer system
GB9204279A Expired - Lifetime GB2251967B (en) 1988-04-13 1992-02-28 Dual computer system

Country Status (6)

Country Link
KR (1) KR920003453B1 (en)
CN (1) CN1041466C (en)
BR (1) BR8901738A (en)
DE (1) DE3911848A1 (en)
GB (3) GB2217487B (en)
NL (1) NL8900635A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT398645B (en) * 1991-11-04 1995-01-25 Alcatel Austria Ag COMPUTER SYSTEM
KR970002628A (en) * 1995-06-30 1997-01-28 Non-stopping system control device and system control method using same
US6311289B1 (en) 1998-11-03 2001-10-30 Telefonaktiebolaget Lm Ericsson (Publ) Explicit state copy in a fault tolerant system using a remote write operation
CN100419627C (en) * 2001-09-28 2008-09-17 技嘉科技股份有限公司 Mainboard with spare key unit and method for activating said spare key unit
CN110745085A (en) * 2019-10-30 2020-02-04 英业达科技有限公司 Computer system for vehicle

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3303474A (en) * 1963-01-17 1967-02-07 Rca Corp Duplexing system for controlling online and standby conditions of two computers
SE313849B (en) * 1966-03-25 1969-08-25 Ericsson Telefon Ab L M
BE693071A (en) * 1967-01-24 1967-07-24
US3864670A (en) * 1970-09-30 1975-02-04 Yokogawa Electric Works Ltd Dual computer system with signal exchange system
GB1412246A (en) * 1971-09-29 1975-10-29 Kent Automation Systems Ltd Computer control arrangements
DE2407241A1 (en) * 1974-02-15 1975-08-21 Ibm Deutschland PROCEDURE AND ARRANGEMENT FOR INCREASING THE AVAILABILITY OF A DIGITAL COMPUTER
FR2319264A1 (en) * 1975-07-22 1977-02-18 Labo Cent Telecommunicat PERFECTED CONTROL SYSTEM OF SWITCHING EQUIPMENT
FR2392569A2 (en) * 1977-05-27 1978-12-22 Labo Cent Telecommunicat PERFECTED CONTROL SYSTEM OF SWITCHING EQUIPMENT
DE2741379A1 (en) * 1977-09-14 1979-03-15 Siemens Ag COMPUTER SYSTEM
JPS5537641A (en) * 1978-09-08 1980-03-15 Fujitsu Ltd Synchronization system for doubled processor
US4466098A (en) * 1982-06-11 1984-08-14 Siemens Corporation Cross channel circuit for an electronic system having two or more redundant computers
DE3235762A1 (en) * 1982-09-28 1984-03-29 Fried. Krupp Gmbh, 4300 Essen METHOD AND DEVICE FOR SYNCHRONIZING DATA PROCESSING SYSTEMS
US4610013A (en) * 1983-11-08 1986-09-02 Avco Corporation Remote multiplexer terminal with redundant central processor units
US4823256A (en) * 1984-06-22 1989-04-18 American Telephone And Telegraph Company, At&T Bell Laboratories Reconfigurable dual processor system
SE454730B (en) * 1986-09-19 1988-05-24 Asea Ab PROCEDURE AND COMPUTER EQUIPMENT FOR SHORT-FREE REPLACEMENT OF THE ACTIVITY FROM ACTIVE DEVICES TO EMERGENCY UNITS IN A CENTRAL UNIT
US4797884A (en) * 1986-09-29 1989-01-10 Texas Instruments Incorporated Redundant device control unit

Also Published As

Publication number Publication date
DE3911848A1 (en) 1989-10-26
KR920003453B1 (en) 1992-05-01
CN1041466C (en) 1998-12-30
GB2217487A (en) 1989-10-25
CN1037417A (en) 1989-11-22
GB9204279D0 (en) 1992-04-08
GB2217487B (en) 1992-09-23
NL8900635A (en) 1989-11-01
GB2251967B (en) 1992-10-14
GB2251966A (en) 1992-07-22
GB9204278D0 (en) 1992-04-08
DE3911848C2 (en) 1991-06-27
GB8904779D0 (en) 1989-04-12
GB2251967A (en) 1992-07-22
BR8901738A (en) 1989-11-21
KR890016466A (en) 1989-11-29

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Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)

Effective date: 19970307

PCNP Patent ceased through non-payment of renewal fee