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GB2217487B - Dual computer system - Google Patents

Dual computer system

Info

Publication number
GB2217487B
GB2217487B GB8904779A GB8904779A GB2217487B GB 2217487 B GB2217487 B GB 2217487B GB 8904779 A GB8904779 A GB 8904779A GB 8904779 A GB8904779 A GB 8904779A GB 2217487 B GB2217487 B GB 2217487B
Authority
GB
Grant status
Grant
Patent type
Prior art keywords
system
processor
dual
main
units
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 - Fee Related
Application number
GB8904779A
Other versions
GB8904779D0 (en )
GB2217487A (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
Grant date

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRICAL DIGITAL DATA PROCESSING
    • G06F11/00Error detection; Error correction; Monitoring
    • G06F11/07Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16Error detection or correction of the data by redundancy in hardware
    • G06F11/20Error 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
    • G06F11/2097Error 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
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRICAL DIGITAL DATA PROCESSING
    • G06F11/00Error detection; Error correction; Monitoring
    • G06F11/07Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16Error detection or correction of the data by redundancy in hardware
    • G06F11/20Error 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
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRICAL DIGITAL DATA PROCESSING
    • G06F11/00Error detection; Error correction; Monitoring
    • G06F11/07Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16Error detection or correction of the data by redundancy in hardware
    • G06F11/20Error 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
    • G06F11/202Error 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
    • G06F11/2023Error 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 details of failing over
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRICAL DIGITAL DATA PROCESSING
    • G06F11/00Error detection; Error correction; Monitoring
    • G06F11/07Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16Error detection or correction of the data by redundancy in hardware
    • G06F11/20Error 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
    • G06F11/202Error 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
    • G06F11/2038Error 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>
GB8904779A 1988-04-13 1989-03-02 Dual computer system Expired - Fee Related GB2217487B (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP9075288A JPH0682283B2 (en) 1988-04-13 1988-04-13 Dual processor system
JP9617288A JPH01266633A (en) 1988-04-19 1988-04-19 Duplex control system
JP9617188A JPH01266634A (en) 1988-04-19 1988-04-19 Duplex control system
JP10506488A JPH0630070B2 (en) 1988-04-27 1988-04-27 Duplicated control system
JP10995588A JPH0621994B2 (en) 1988-05-06 1988-05-06 Duplicated control system

Publications (3)

Publication Number Publication Date
GB8904779D0 GB8904779D0 (en) 1989-04-12
GB2217487A true GB2217487A (en) 1989-10-25
GB2217487B true GB2217487B (en) 1992-09-23

Family

ID=27525498

Family Applications (3)

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

Family Applications After (2)

Application Number Title Priority Date Filing Date
GB9204278A Expired - Fee Related GB2251966B (en) 1988-04-13 1992-02-28 Dual computer system
GB9204279A Expired - Fee Related GB2251967B (en) 1988-04-13 1992-02-28 Dual computer system

Country Status (5)

Country Link
KR (1) KR920003453B1 (en)
CN (1) CN1041466C (en)
DE (1) DE3911848C2 (en)
GB (3) GB2217487B (en)
NL (1) NL8900635A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1412246A (en) * 1971-09-29 1975-10-29 Kent Automation Systems Ltd Computer control arrangements
GB1466488A (en) * 1974-02-15 1977-03-09 Ibm Modular digital computer systems
GB1516559A (en) * 1975-07-22 1978-07-05 Int Standard Electric Corp Multiprocessor system for a switching centre
GB2004673A (en) * 1977-09-14 1979-04-04 Siemens Ag Computer system
GB1556852A (en) * 1977-05-27 1979-11-28 Int Standard Electric Corp Control system for a switching system
GB2032149A (en) * 1978-09-08 1980-04-30 Fujitsu Ltd Transferring from Working to Standby Processor on Fault
EP0104490A2 (en) * 1982-09-28 1984-04-04 Fried. Krupp Gesellschaft mit beschränkter Haftung Method and device for the synchronization of a data processing system
US4466098A (en) * 1982-06-11 1984-08-14 Siemens Corporation Cross channel circuit for an electronic system having two or more redundant computers
WO1986000439A1 (en) * 1984-06-22 1986-01-16 American Telephone & Telegraph Company Reconfigurable dual processor system
US4610013A (en) * 1983-11-08 1986-09-02 Avco Corporation Remote multiplexer terminal with redundant central processor units
EP0260625A1 (en) * 1986-09-19 1988-03-23 Asea Ab Method for bumpless changeover from active units to back-up units in computer equipment and a device for carrying out the method
EP0262923A2 (en) * 1986-09-29 1988-04-06 Texas Instruments Incorporated Redundant device control unit

Family Cites Families (4)

* 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
US3503048A (en) * 1966-03-25 1970-03-24 Ericsson Telefon Ab L M Arrangement in computers for controlling a plant consisting of a plurality of cooperating means
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

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1412246A (en) * 1971-09-29 1975-10-29 Kent Automation Systems Ltd Computer control arrangements
GB1466488A (en) * 1974-02-15 1977-03-09 Ibm Modular digital computer systems
GB1516559A (en) * 1975-07-22 1978-07-05 Int Standard Electric Corp Multiprocessor system for a switching centre
GB1556852A (en) * 1977-05-27 1979-11-28 Int Standard Electric Corp Control system for a switching system
GB2004673A (en) * 1977-09-14 1979-04-04 Siemens Ag Computer system
GB2032149A (en) * 1978-09-08 1980-04-30 Fujitsu Ltd Transferring from Working to Standby Processor on Fault
US4466098A (en) * 1982-06-11 1984-08-14 Siemens Corporation Cross channel circuit for an electronic system having two or more redundant computers
EP0104490A2 (en) * 1982-09-28 1984-04-04 Fried. Krupp Gesellschaft mit beschränkter Haftung Method and device for the synchronization of a data processing system
US4610013A (en) * 1983-11-08 1986-09-02 Avco Corporation Remote multiplexer terminal with redundant central processor units
WO1986000439A1 (en) * 1984-06-22 1986-01-16 American Telephone & Telegraph Company Reconfigurable dual processor system
EP0260625A1 (en) * 1986-09-19 1988-03-23 Asea Ab Method for bumpless changeover from active units to back-up units in computer equipment and a device for carrying out the method
EP0262923A2 (en) * 1986-09-29 1988-04-06 Texas Instruments Incorporated Redundant device control unit

Also Published As

Publication number Publication date Type
GB2251967B (en) 1992-10-14 grant
DE3911848C2 (en) 1991-06-27 grant
GB2251967A (en) 1992-07-22 application
GB8904779D0 (en) 1989-04-12 grant
KR920003453B1 (en) 1992-05-01 grant
NL8900635A (en) 1989-11-01 application
GB9204279D0 (en) 1992-04-08 grant
DE3911848A1 (en) 1989-10-26 application
CN1041466C (en) 1998-12-30 grant
GB2217487A (en) 1989-10-25 application
GB2251966B (en) 1992-10-14 grant
CN1037417A (en) 1989-11-22 application
GB9204278D0 (en) 1992-04-08 grant
GB2251966A (en) 1992-07-22 application

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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