JPS56162555A - Centralized monitoring device - Google Patents

Centralized monitoring device

Info

Publication number
JPS56162555A
JPS56162555A JP6621880A JP6621880A JPS56162555A JP S56162555 A JPS56162555 A JP S56162555A JP 6621880 A JP6621880 A JP 6621880A JP 6621880 A JP6621880 A JP 6621880A JP S56162555 A JPS56162555 A JP S56162555A
Authority
JP
Japan
Prior art keywords
fault
state
line
repeater
monitoring
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
JP6621880A
Other languages
Japanese (ja)
Other versions
JPS6012822B2 (en
Inventor
Katsuya Yasuda
Yoshiyuki Koshiishi
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.)
Hochiki Corp
Original Assignee
Hochiki 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 Hochiki Corp filed Critical Hochiki Corp
Priority to JP55066218A priority Critical patent/JPS6012822B2/en
Publication of JPS56162555A publication Critical patent/JPS56162555A/en
Publication of JPS6012822B2 publication Critical patent/JPS6012822B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/40—Monitoring; Testing of relay systems

Landscapes

  • Small-Scale Networks (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Selective Calling Equipment (AREA)

Abstract

PURPOSE:To improve the reliability of a centralized monitoring device by detecting the occurence of a fault from the signal state of an answer line to a monitoring terminal at a receiver side and by displaying the state of the detected fault. CONSTITUTION:A call line Lc, answer line La and common line Lo connected to a receiver 10 in a center connect with a repeater 12, to which a state detector 13 is connected. This detector 13 and repeater 12 constitute a monitoring terminal and monitoring terminals are connected to the lines Lo-Lc, thus constituting a centralized monitoring device. Then, the clock generator 18 of the receiver 10 calls those monitoring terminals in every prescribed cycle in time-division mode successively and a state signal sent to the line La in response to the calling of the repeater 12 is received by a discriminating circuit 19 and a fault discriminating circuit 23. If the state signal is obained in the period when the monitoring terminal does not send the state signal once provided in the call cycle, the circuit 23 generates the output which shows the discrimination of the generation of a fault, thereby displaying the fault through a fault outputting circuit 24.
JP55066218A 1980-05-19 1980-05-19 central monitoring device Expired JPS6012822B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55066218A JPS6012822B2 (en) 1980-05-19 1980-05-19 central monitoring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55066218A JPS6012822B2 (en) 1980-05-19 1980-05-19 central monitoring device

Publications (2)

Publication Number Publication Date
JPS56162555A true JPS56162555A (en) 1981-12-14
JPS6012822B2 JPS6012822B2 (en) 1985-04-03

Family

ID=13309467

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55066218A Expired JPS6012822B2 (en) 1980-05-19 1980-05-19 central monitoring device

Country Status (1)

Country Link
JP (1) JPS6012822B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01152898A (en) * 1987-12-10 1989-06-15 Nissan Motor Co Ltd Drive controller using limit switch
US6677692B1 (en) 1998-04-23 2004-01-13 Citizen Watch Co., Ltd. Rotor of small-sized motor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01152898A (en) * 1987-12-10 1989-06-15 Nissan Motor Co Ltd Drive controller using limit switch
US6677692B1 (en) 1998-04-23 2004-01-13 Citizen Watch Co., Ltd. Rotor of small-sized motor

Also Published As

Publication number Publication date
JPS6012822B2 (en) 1985-04-03

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