JPS56159743A - Emergency control circuit - Google Patents

Emergency control circuit

Info

Publication number
JPS56159743A
JPS56159743A JP6259380A JP6259380A JPS56159743A JP S56159743 A JPS56159743 A JP S56159743A JP 6259380 A JP6259380 A JP 6259380A JP 6259380 A JP6259380 A JP 6259380A JP S56159743 A JPS56159743 A JP S56159743A
Authority
JP
Japan
Prior art keywords
emergency control
ema0
ema1
circuits
control circuit
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
JP6259380A
Other languages
Japanese (ja)
Other versions
JPS6156538B2 (en
Inventor
Nobuharu Kanazawa
Shiyuuichi Shimokiba
Akira Endo
Yoshio Sakurai
Isamu Yasui
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
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Original Assignee
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Nippon Electric Co 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, Hitachi Ltd, NEC Corp, Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd, Nippon Electric Co Ltd filed Critical Fujitsu Ltd
Priority to JP6259380A priority Critical patent/JPS56159743A/en
Publication of JPS56159743A publication Critical patent/JPS56159743A/en
Publication of JPS6156538B2 publication Critical patent/JPS6156538B2/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 prevent a system from being shut down owing to a fault of an emergency control circuit, by providing emergency control circuits in a plurality corresponding to a group of central processors forming multiple constitution. CONSTITUTION:On the occurrence of a fault, emergency control circuits EMA0 and EMA1 provided corresponding to central controllers CC0 and CC1 forming double constitution are actuated at the same time, and according to the states of emergency control counters provided in circuits EMA0 and EMA1, either one of circuits EMA0 or EMA1 is used for emergency control operation. The emergency control counters are driven every time the circuits EMA0 and EMA1 are actuated, so the circuits EMA0 and EMA1 used for the emergency control operation are selected alternately. Therefore, even if one emergency control circuit EMA0 or EMA1 gets out of order due to a fault, the remaining emergancy control circuit actuates the corresponding central controller CC0 or CC1 to perform the emergency control operation, so that the system will not be stopped.
JP6259380A 1980-05-12 1980-05-12 Emergency control circuit Granted JPS56159743A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6259380A JPS56159743A (en) 1980-05-12 1980-05-12 Emergency control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6259380A JPS56159743A (en) 1980-05-12 1980-05-12 Emergency control circuit

Publications (2)

Publication Number Publication Date
JPS56159743A true JPS56159743A (en) 1981-12-09
JPS6156538B2 JPS6156538B2 (en) 1986-12-03

Family

ID=13204770

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6259380A Granted JPS56159743A (en) 1980-05-12 1980-05-12 Emergency control circuit

Country Status (1)

Country Link
JP (1) JPS56159743A (en)

Also Published As

Publication number Publication date
JPS6156538B2 (en) 1986-12-03

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