JPS5793455A - Backup system for operating device - Google Patents

Backup system for operating device

Info

Publication number
JPS5793455A
JPS5793455A JP55169241A JP16924180A JPS5793455A JP S5793455 A JPS5793455 A JP S5793455A JP 55169241 A JP55169241 A JP 55169241A JP 16924180 A JP16924180 A JP 16924180A JP S5793455 A JPS5793455 A JP S5793455A
Authority
JP
Japan
Prior art keywords
error
signals
bus
memory
cpu2
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
JP55169241A
Other languages
Japanese (ja)
Other versions
JPS6131492B2 (en
Inventor
Noritaka Egami
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi 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
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP55169241A priority Critical patent/JPS5793455A/en
Publication of JPS5793455A publication Critical patent/JPS5793455A/en
Publication of JPS6131492B2 publication Critical patent/JPS6131492B2/ja
Granted 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 cooperate backup of multi-stages easily and economically, by locating each central processor on a common bus and determining if the connection to the bus is effective with signals among the processors. CONSTITUTION:At initial condition, assuming that CPUs 1, 2 and 9 have no error, then signals 10, 20 and 90 are all at low state, and a bus effective signal is at high level only for 17, and the signals 27 and 97 are both at low level. Thus, the CPU1 is connected to a memory 3 and an I/O4. The CPU1 is disconnected, if it is in error, and the CPU2 is connected to the memory 3 and the I/O4. Similarly, when the CPU2 also is in error, the CPU9 is connected to the memory section 3 and the I/O4 and the CPUs 1 and 2 are disconnected.
JP55169241A 1980-11-28 1980-11-28 Backup system for operating device Granted JPS5793455A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55169241A JPS5793455A (en) 1980-11-28 1980-11-28 Backup system for operating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55169241A JPS5793455A (en) 1980-11-28 1980-11-28 Backup system for operating device

Publications (2)

Publication Number Publication Date
JPS5793455A true JPS5793455A (en) 1982-06-10
JPS6131492B2 JPS6131492B2 (en) 1986-07-21

Family

ID=15882852

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55169241A Granted JPS5793455A (en) 1980-11-28 1980-11-28 Backup system for operating device

Country Status (1)

Country Link
JP (1) JPS5793455A (en)

Also Published As

Publication number Publication date
JPS6131492B2 (en) 1986-07-21

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