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JPS574632A - Remote monitor control unit - Google Patents

Remote monitor control unit

Info

Publication number
JPS574632A
JPS574632A JP7764680A JP7764680A JPS574632A JP S574632 A JPS574632 A JP S574632A JP 7764680 A JP7764680 A JP 7764680A JP 7764680 A JP7764680 A JP 7764680A JP S574632 A JPS574632 A JP S574632A
Authority
JP
Japan
Prior art keywords
slave station
signal
carrier wave
interruption
calling
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
JP7764680A
Other languages
Japanese (ja)
Inventor
Masami Watabe
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 Engineering Co Ltd
Hitachi Ltd
Original Assignee
Hitachi Engineering Co Ltd
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 Engineering Co Ltd, Hitachi Ltd filed Critical Hitachi Engineering Co Ltd
Priority to JP7764680A priority Critical patent/JPS574632A/en
Publication of JPS574632A publication Critical patent/JPS574632A/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)
  • Alarm Systems (AREA)
  • Fire Alarms (AREA)
  • Small-Scale Networks (AREA)
  • Selective Calling Equipment (AREA)

Abstract

PURPOSE:To realize an emergent interruption with a simple and low-cost device, by detecting the fact that the carrier presence signal of a slave station has been produced when a command signal for calling a slave station is not delivered to the slave station. CONSTITUTION:An emergent interruption signal 12 is delivered from an emergent information detecting circuit 5 of a slave station 18, and a carrier transmission command 11 is produced. Thus a carrier wave is transmitted from a transmitter 9, and a carrier wave detector 21 for the slave station detects the carrier wave to deliver a carrier wave presence signal 26 for the slave station. An interruption request signal 32 to a slave station is supplied to a control device 33 for calling the slave station through an AND gate 23, and the device 33 produces a command signal for calling the slave station. And a control device slave station 7 of a slave station 18 is called at a master station 1. As a result, an interruption memory set signal 8 is supplied to the circuit 5, and the signal 12 is reset.
JP7764680A 1980-06-11 1980-06-11 Remote monitor control unit Pending JPS574632A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7764680A JPS574632A (en) 1980-06-11 1980-06-11 Remote monitor control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7764680A JPS574632A (en) 1980-06-11 1980-06-11 Remote monitor control unit

Publications (1)

Publication Number Publication Date
JPS574632A true JPS574632A (en) 1982-01-11

Family

ID=13639652

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7764680A Pending JPS574632A (en) 1980-06-11 1980-06-11 Remote monitor control unit

Country Status (1)

Country Link
JP (1) JPS574632A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6254398A (en) * 1985-09-02 1987-03-10 関　広 Invader alarm

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6254398A (en) * 1985-09-02 1987-03-10 関　広 Invader alarm
JPH0510716B2 (en) * 1985-09-02 1993-02-10 Hiroshi Seki

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