JPS5781655A - Switching system for now-in-use and stand-by decvices - Google Patents

Switching system for now-in-use and stand-by decvices

Info

Publication number
JPS5781655A
JPS5781655A JP55156553A JP15655380A JPS5781655A JP S5781655 A JPS5781655 A JP S5781655A JP 55156553 A JP55156553 A JP 55156553A JP 15655380 A JP15655380 A JP 15655380A JP S5781655 A JPS5781655 A JP S5781655A
Authority
JP
Japan
Prior art keywords
now
line
stand
inh
plural
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
JP55156553A
Other languages
Japanese (ja)
Inventor
Akira Takase
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP55156553A priority Critical patent/JPS5781655A/en
Publication of JPS5781655A publication Critical patent/JPS5781655A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Hardware Redundancy (AREA)

Abstract

PURPOSE:To set only 1 processor of plural console units to on-line at all times, by connecting in series a connection controlling part provided on each of said console units to each other, and providing an exclusive function to each of them. CONSTITUTION:Only one of plural console units U1,U2 is used as a now-in-use device, the other is used as a stand-by device, and only one stand-by device is made to the now-in-use device automatically when the now-in-use device has been detached or has been set to off-line, by this now-in-use and stand-by switching system, and the plural units U1,U2 are connected in parallel to a common bus, and a connection controlling part CONT provided in each device is con nected in series to an inhibit signal line INH. When the INH from the poststage side exists, the INH is sent out to the prestage. When an SW is closed in the following poststage unit, the INH is given to its unit, and it is set to off-line. The unit of the poststage side is usually set to on-line, and when a fault has occured in it, the prestage is set to on-line.
JP55156553A 1980-11-07 1980-11-07 Switching system for now-in-use and stand-by decvices Pending JPS5781655A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55156553A JPS5781655A (en) 1980-11-07 1980-11-07 Switching system for now-in-use and stand-by decvices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55156553A JPS5781655A (en) 1980-11-07 1980-11-07 Switching system for now-in-use and stand-by decvices

Publications (1)

Publication Number Publication Date
JPS5781655A true JPS5781655A (en) 1982-05-21

Family

ID=15630306

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55156553A Pending JPS5781655A (en) 1980-11-07 1980-11-07 Switching system for now-in-use and stand-by decvices

Country Status (1)

Country Link
JP (1) JPS5781655A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0083422A2 (en) * 1981-12-31 1983-07-13 International Business Machines Corporation Cross checking among service processors in a multi-processor system
JPH05307491A (en) * 1986-01-16 1993-11-19 Hitachi Ltd Method and device for switching multiplexing processor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0083422A2 (en) * 1981-12-31 1983-07-13 International Business Machines Corporation Cross checking among service processors in a multi-processor system
JPH05307491A (en) * 1986-01-16 1993-11-19 Hitachi Ltd Method and device for switching multiplexing processor

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