JPS5490938A - Fault detection system - Google Patents

Fault detection system

Info

Publication number
JPS5490938A
JPS5490938A JP15830877A JP15830877A JPS5490938A JP S5490938 A JPS5490938 A JP S5490938A JP 15830877 A JP15830877 A JP 15830877A JP 15830877 A JP15830877 A JP 15830877A JP S5490938 A JPS5490938 A JP S5490938A
Authority
JP
Japan
Prior art keywords
unit
signal
control function
failure
failure detector
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
JP15830877A
Other languages
Japanese (ja)
Other versions
JPS5725848B2 (en
Inventor
Mamoru Chino
Takashi Ishikawa
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 JP15830877A priority Critical patent/JPS5490938A/en
Publication of JPS5490938A publication Critical patent/JPS5490938A/en
Publication of JPS5725848B2 publication Critical patent/JPS5725848B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Detection And Prevention Of Errors In Transmission (AREA)
  • Detection And Correction Of Errors (AREA)

Abstract

PURPOSE: To make unnecessary the delivery line of exclusive response signal, by checking the return signal including redundancy signal with the failure detector of the unit having control function and by detecting the interface failure of the units having and not having control function.
CONSTITUTION: The unit A having control function and the controlled unit B not having the control function are respectively provided with the redundancy signal generator and the failure detector. The unit A produces the redundancy signal S1 with the redundancy signal generator to the information transferred to the unit B and adds it to the unit B, the unit B checks the information including the redundancy signal S1 received with the failure detector, and logical operation is made between the output obtained from the failure detector and the signal S1 to the response signal S3. The result of operation is added to the signal S3 and is returned to the unit having control function, the return signal including redundancy signal is checked with the failure detector of the unit A, and the interface failure of the both units is detected. Thus, exclusive transmission path to deliver the result of failure detection from the unit B can be made unnecessary.
COPYRIGHT: (C)1979,JPO&Japio
JP15830877A 1977-12-27 1977-12-27 Fault detection system Granted JPS5490938A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15830877A JPS5490938A (en) 1977-12-27 1977-12-27 Fault detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15830877A JPS5490938A (en) 1977-12-27 1977-12-27 Fault detection system

Publications (2)

Publication Number Publication Date
JPS5490938A true JPS5490938A (en) 1979-07-19
JPS5725848B2 JPS5725848B2 (en) 1982-06-01

Family

ID=15668783

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15830877A Granted JPS5490938A (en) 1977-12-27 1977-12-27 Fault detection system

Country Status (1)

Country Link
JP (1) JPS5490938A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5135334A (en) * 1974-09-20 1976-03-25 Canon Kk
JPS53111255A (en) * 1977-03-04 1978-09-28 Hitachi Ltd Check system for interface control signal
JPS5422734A (en) * 1977-07-22 1979-02-20 Hitachi Ltd Data transfer device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5135334A (en) * 1974-09-20 1976-03-25 Canon Kk
JPS53111255A (en) * 1977-03-04 1978-09-28 Hitachi Ltd Check system for interface control signal
JPS5422734A (en) * 1977-07-22 1979-02-20 Hitachi Ltd Data transfer device

Also Published As

Publication number Publication date
JPS5725848B2 (en) 1982-06-01

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