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JPS5715548A - Polling monitor system - Google Patents

Polling monitor system

Info

Publication number
JPS5715548A
JPS5715548A JP8919680A JP8919680A JPS5715548A JP S5715548 A JPS5715548 A JP S5715548A JP 8919680 A JP8919680 A JP 8919680A JP 8919680 A JP8919680 A JP 8919680A JP S5715548 A JPS5715548 A JP S5715548A
Authority
JP
Japan
Prior art keywords
monitor station
priority
station
monitor
call out
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
JP8919680A
Other languages
Japanese (ja)
Inventor
Saburo Kamei
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 JP8919680A priority Critical patent/JPS5715548A/en
Publication of JPS5715548A publication Critical patent/JPS5715548A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Selective Calling Equipment (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE:To prevent the double polling call out to a station to be monitored, by providing a priority discrimination circuit at each monitoring station and transmitting a polling call out carrier through the priority of a monitor station. CONSTITUTION:When a failure takes place in a monitor station 1 and a polling call out carrier A stops, monitor stations 2, 3 start counting clock pulses. Further, a polling call out carrier B is transmitted from only the monitor station 2 having a shorter delay time. Further, in the monitor station 3, a priority discrimination circuit makes priority discrimination with the monitor stations 2, 3, and since the monitor station 2 has the priority, the monitor station 2 continues the operation. Next, when the monitor station 1 is restored, the monitor station 1 starts to operate with the priority discrimination circuit of the monitor station 1 and the polling call out carrier A' is transmitted again. As a result, the monitor station 2 during the operation immediately stops and the operation of the monitor station 2 is not restarted through the priority discrimination of the priority circuit of the monitor station 2.
JP8919680A 1980-07-02 1980-07-02 Polling monitor system Pending JPS5715548A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8919680A JPS5715548A (en) 1980-07-02 1980-07-02 Polling monitor system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8919680A JPS5715548A (en) 1980-07-02 1980-07-02 Polling monitor system

Publications (1)

Publication Number Publication Date
JPS5715548A true JPS5715548A (en) 1982-01-26

Family

ID=13963953

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8919680A Pending JPS5715548A (en) 1980-07-02 1980-07-02 Polling monitor system

Country Status (1)

Country Link
JP (1) JPS5715548A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5928742A (en) * 1982-08-09 1984-02-15 Hokuriku Electric Power Co Inc:The Remote supervisory and controlling equipment
JPS5940743A (en) * 1982-08-31 1984-03-06 Yamatake Honeywell Co Ltd Communication system of process control system
JPS59172857A (en) * 1983-03-22 1984-09-29 Fujitsu Ltd Data collecting system
JPS60130941A (en) * 1983-12-20 1985-07-12 Agency Of Ind Science & Technol Network of computer
JPH01256843A (en) * 1988-03-25 1989-10-13 Ncr Corp Link control system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5928742A (en) * 1982-08-09 1984-02-15 Hokuriku Electric Power Co Inc:The Remote supervisory and controlling equipment
JPS5940743A (en) * 1982-08-31 1984-03-06 Yamatake Honeywell Co Ltd Communication system of process control system
JPS59172857A (en) * 1983-03-22 1984-09-29 Fujitsu Ltd Data collecting system
JPH039665B2 (en) * 1983-03-22 1991-02-08 Fujitsu Ltd
JPS60130941A (en) * 1983-12-20 1985-07-12 Agency Of Ind Science & Technol Network of computer
JPH01256843A (en) * 1988-03-25 1989-10-13 Ncr Corp Link control system

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