JPS5755640A - Recognizing method for power failure of power source of subordinate station side by remote controller - Google Patents

Recognizing method for power failure of power source of subordinate station side by remote controller

Info

Publication number
JPS5755640A
JPS5755640A JP55130746A JP13074680A JPS5755640A JP S5755640 A JPS5755640 A JP S5755640A JP 55130746 A JP55130746 A JP 55130746A JP 13074680 A JP13074680 A JP 13074680A JP S5755640 A JPS5755640 A JP S5755640A
Authority
JP
Japan
Prior art keywords
signal
information signal
station
power failure
data
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
JP55130746A
Other languages
Japanese (ja)
Other versions
JPS6342898B2 (en
Inventor
Yoshiaki Takahashi
Takeshi Saito
Kiyoshi Tokito
Shinichi Okabe
Masami Watanabe
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 JP55130746A priority Critical patent/JPS5755640A/en
Publication of JPS5755640A publication Critical patent/JPS5755640A/en
Publication of JPS6342898B2 publication Critical patent/JPS6342898B2/ja
Granted 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

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

Abstract

PURPOSE:To reduce the scale of hardware without requiring a high-precision filter for a receiving circuit, by sending a priority request and information on a power failure by a common informaton signal and by recognizing that a subordinate station has a power failure when no data is sent withing a constant time. CONSTITUTION:A priority request signal c1 and a power-failure information signal d1 are ORed by an OR circuit 28 to be inputted as a common information signal to an information signal transmitter 29, thereby transmitting it to a master station 1 as a signal of an information signal transmission band. This information signal e1 is received by an information signal receiver 17 of the master station 1 and then fetched in a master-station logical circuit 11. Then, the circuit 11 judged the signal e1 as a priority request signal ci and sends a call signal a subordinate station (i). When the information signal is judged to be the priority request signal, data is sent from the subordinate station (i) and priority data fetching operation is carried out. When the information signal is judged to be the power-failure information signal, it is impossible to send the data in response to the call because the subordinate station (i) has the power failure, and then the master station monitors the data response time of the subordinate station to recognize the occurrence of the power failure to display that.
JP55130746A 1980-09-22 1980-09-22 Recognizing method for power failure of power source of subordinate station side by remote controller Granted JPS5755640A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55130746A JPS5755640A (en) 1980-09-22 1980-09-22 Recognizing method for power failure of power source of subordinate station side by remote controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55130746A JPS5755640A (en) 1980-09-22 1980-09-22 Recognizing method for power failure of power source of subordinate station side by remote controller

Publications (2)

Publication Number Publication Date
JPS5755640A true JPS5755640A (en) 1982-04-02
JPS6342898B2 JPS6342898B2 (en) 1988-08-26

Family

ID=15041638

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55130746A Granted JPS5755640A (en) 1980-09-22 1980-09-22 Recognizing method for power failure of power source of subordinate station side by remote controller

Country Status (1)

Country Link
JP (1) JPS5755640A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61100042A (en) * 1984-10-22 1986-05-19 Matsushita Electric Ind Co Ltd Transmission controller
JP2011176934A (en) * 2010-02-24 2011-09-08 Mitsubishi Electric Corp Power failure determining device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61100042A (en) * 1984-10-22 1986-05-19 Matsushita Electric Ind Co Ltd Transmission controller
JPH0332937B2 (en) * 1984-10-22 1991-05-15 Matsushita Electric Ind Co Ltd
JP2011176934A (en) * 2010-02-24 2011-09-08 Mitsubishi Electric Corp Power failure determining device

Also Published As

Publication number Publication date
JPS6342898B2 (en) 1988-08-26

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