JPS57197668A - Status check method in duplex system - Google Patents

Status check method in duplex system

Info

Publication number
JPS57197668A
JPS57197668A JP56082807A JP8280781A JPS57197668A JP S57197668 A JPS57197668 A JP S57197668A JP 56082807 A JP56082807 A JP 56082807A JP 8280781 A JP8280781 A JP 8280781A JP S57197668 A JPS57197668 A JP S57197668A
Authority
JP
Japan
Prior art keywords
status information
systems
register
controlling section
status
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
JP56082807A
Other languages
Japanese (ja)
Inventor
Kenji Hiramine
Reijiro Aoki
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.)
Omron Corp
Original Assignee
Tateisi Electronics Co
Omron Tateisi Electronics Co
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 Tateisi Electronics Co, Omron Tateisi Electronics Co filed Critical Tateisi Electronics Co
Priority to JP56082807A priority Critical patent/JPS57197668A/en
Publication of JPS57197668A publication Critical patent/JPS57197668A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/40—Bus structure
    • G06F13/4004—Coupling between buses
    • G06F13/4022—Coupling between buses using switching circuits, e.g. switching matrix, connection or expansion network

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Multi Processors (AREA)
  • Hardware Redundancy (AREA)
  • Debugging And Monitoring (AREA)

Abstract

PURPOSE:To enable to monitor the state of other systems at all times, independently of the presence/absence of a connecting line between both the controlling systems, by providing a status information storage section for a switching controlling section so that the controlling section can always be confirmed at a constant period from both the systems. CONSTITUTION:A status register 9 has an area storing status information as shown in Figure. Every time refresh timers 14 and 15 receive command signals A and B, refreshing is made. If either one system is in failure, since no command signal is given to a corresponding timer, the timer is in time-up. This output is a signal representing the failure of the system and stored in the status register 9. A scanning signal S is supplied from both the control systems and the status information of the register 9 can be read. A bus switching controlling section 22 determines which of buses 21, 19 or 20 is connected based on the status information and a bus driver/receiver 17 or 18 is driven.
JP56082807A 1981-05-30 1981-05-30 Status check method in duplex system Pending JPS57197668A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56082807A JPS57197668A (en) 1981-05-30 1981-05-30 Status check method in duplex system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56082807A JPS57197668A (en) 1981-05-30 1981-05-30 Status check method in duplex system

Publications (1)

Publication Number Publication Date
JPS57197668A true JPS57197668A (en) 1982-12-03

Family

ID=13784675

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56082807A Pending JPS57197668A (en) 1981-05-30 1981-05-30 Status check method in duplex system

Country Status (1)

Country Link
JP (1) JPS57197668A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61160551U (en) * 1985-03-25 1986-10-04
JPS6290068A (en) * 1985-10-16 1987-04-24 Hitachi Ltd Auxiliary monitor system
JPH01312659A (en) * 1988-06-13 1989-12-18 Sony Corp Inter-cpu communication system
JP2009049105A (en) * 2007-08-16 2009-03-05 Fukuda Denshi Co Ltd Locking device of electronic medical appliance, mounting stand, and moving rack

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61160551U (en) * 1985-03-25 1986-10-04
JPS6290068A (en) * 1985-10-16 1987-04-24 Hitachi Ltd Auxiliary monitor system
JPH01312659A (en) * 1988-06-13 1989-12-18 Sony Corp Inter-cpu communication system
JP2009049105A (en) * 2007-08-16 2009-03-05 Fukuda Denshi Co Ltd Locking device of electronic medical appliance, mounting stand, and moving rack

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