JPS5739645A - System designation circuit - Google Patents

System designation circuit

Info

Publication number
JPS5739645A
JPS5739645A JP55114836A JP11483680A JPS5739645A JP S5739645 A JPS5739645 A JP S5739645A JP 55114836 A JP55114836 A JP 55114836A JP 11483680 A JP11483680 A JP 11483680A JP S5739645 A JPS5739645 A JP S5739645A
Authority
JP
Japan
Prior art keywords
holding type
existing
power supply
type relay
relay
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
JP55114836A
Other languages
Japanese (ja)
Other versions
JPS634394B2 (en
Inventor
Masao Kataoka
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP55114836A priority Critical patent/JPS5739645A/en
Publication of JPS5739645A publication Critical patent/JPS5739645A/en
Publication of JPS634394B2 publication Critical patent/JPS634394B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Hardware Redundancy (AREA)
  • Multi Processors (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

PURPOSE:To use a duplicated device of existing and waiting systems alternately, by storing a system which is used as the existing system before the power suuply interruption through the use of a holding type relay, identifying the recording state of the holding type relay at the next application of power supply, and taking the system being the waiting system as the existing system to constitute the existing and waiting systems. CONSTITUTION:A holding type relay 6 is of magnetic holding type or mechanical holding type and the relay holds opening or closing state of a contact CT even if the power supply is interrupted. When the power supply is applied, a state deciding circuit 7 checks the presence of ground on either of a holding type relay output line 6A or 6B. If a processor 2B is the existing system at the operation before, ground is given on the output line 6B to make a flip-flop controlling line 8B high in level. Since this signal resets a flip-flop 4 via an OR gate 9B, a selector 3 selects a processor 2A as the existing system.
JP55114836A 1980-08-22 1980-08-22 System designation circuit Granted JPS5739645A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55114836A JPS5739645A (en) 1980-08-22 1980-08-22 System designation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55114836A JPS5739645A (en) 1980-08-22 1980-08-22 System designation circuit

Publications (2)

Publication Number Publication Date
JPS5739645A true JPS5739645A (en) 1982-03-04
JPS634394B2 JPS634394B2 (en) 1988-01-28

Family

ID=14647906

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55114836A Granted JPS5739645A (en) 1980-08-22 1980-08-22 System designation circuit

Country Status (1)

Country Link
JP (1) JPS5739645A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015082413A (en) * 2013-10-23 2015-04-27 Smc株式会社 Ionizer and method of controlling the same
CN104577725B (en) * 2013-10-23 2017-01-04 Smc株式会社 Ion generator and control method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015082413A (en) * 2013-10-23 2015-04-27 Smc株式会社 Ionizer and method of controlling the same
CN104577725A (en) * 2013-10-23 2015-04-29 Smc株式会社 Ionizer and control method thereof
US9351386B2 (en) 2013-10-23 2016-05-24 Smc Corporation Ionizer and control method thereof
CN104577725B (en) * 2013-10-23 2017-01-04 Smc株式会社 Ion generator and control method thereof

Also Published As

Publication number Publication date
JPS634394B2 (en) 1988-01-28

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