JPS57152250A - Centralized monitoring system for alarm - Google Patents

Centralized monitoring system for alarm

Info

Publication number
JPS57152250A
JPS57152250A JP56036379A JP3637981A JPS57152250A JP S57152250 A JPS57152250 A JP S57152250A JP 56036379 A JP56036379 A JP 56036379A JP 3637981 A JP3637981 A JP 3637981A JP S57152250 A JPS57152250 A JP S57152250A
Authority
JP
Japan
Prior art keywords
alarm
signals
panels
monitoring device
fault
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
JP56036379A
Other languages
Japanese (ja)
Inventor
Hiroshi Ogasawara
Yoshio Kanezashi
Hideaki Okamoto
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 JP56036379A priority Critical patent/JPS57152250A/en
Publication of JPS57152250A publication Critical patent/JPS57152250A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B26/00—Alarm systems in which substations are interrogated in succession by a central station
    • G08B26/001—Alarm systems in which substations are interrogated in succession by a central station with individual interrogation of substations connected in parallel
    • G08B26/002—Alarm systems in which substations are interrogated in succession by a central station with individual interrogation of substations connected in parallel only replying the state of the sensor

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE:To detect the fault of a complex circuit easily by generating many alarm signals by transmitting pulses, which each have an added address, to respective panels from an alarm monitoring device all the time, and returning signals, generated as alarm ones, from the panels when a fault occurs. CONSTITUTION:From the clock pulse generator 32 of an alarm monitoring device 31, a clock pulse having an added frame pulse is transmitted to respective panels 36-1-36-n. This pulse is detected by frame pulse detectors 37 to clear counters 38-1, 38-2-, which count clocks successively. When an alarm signal is inputted to alarm terminals 43 and 44, the alarm signal is added to clock pulses inputted to AND gates 39 and 40 and waveform-shaped by counters 38-1, 38-2-, thereby returning the resulting signals to the monitoring device 31 through gate circuits 41 and 42. Then, many alarm signals are generated by the panels 36-1- 36-n to detect the fault of the complex circuit easily.
JP56036379A 1981-03-13 1981-03-13 Centralized monitoring system for alarm Pending JPS57152250A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56036379A JPS57152250A (en) 1981-03-13 1981-03-13 Centralized monitoring system for alarm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56036379A JPS57152250A (en) 1981-03-13 1981-03-13 Centralized monitoring system for alarm

Publications (1)

Publication Number Publication Date
JPS57152250A true JPS57152250A (en) 1982-09-20

Family

ID=12468207

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56036379A Pending JPS57152250A (en) 1981-03-13 1981-03-13 Centralized monitoring system for alarm

Country Status (1)

Country Link
JP (1) JPS57152250A (en)

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