JPS5642450A - Information transmission system - Google Patents

Information transmission system

Info

Publication number
JPS5642450A
JPS5642450A JP11731479A JP11731479A JPS5642450A JP S5642450 A JPS5642450 A JP S5642450A JP 11731479 A JP11731479 A JP 11731479A JP 11731479 A JP11731479 A JP 11731479A JP S5642450 A JPS5642450 A JP S5642450A
Authority
JP
Japan
Prior art keywords
master station
subordinate
station
sent
tone
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
JP11731479A
Other languages
Japanese (ja)
Inventor
Yoshiaki Sekiya
Shigeru Hishinuma
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.)
Kyosan Electric Manufacturing Co Ltd
Original Assignee
Kyosan Electric Manufacturing Co 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 Kyosan Electric Manufacturing Co Ltd filed Critical Kyosan Electric Manufacturing Co Ltd
Priority to JP11731479A priority Critical patent/JPS5642450A/en
Publication of JPS5642450A publication Critical patent/JPS5642450A/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
    • H04Q9/08—Calling by using continuous ac
    • H04Q9/12—Calling by using continuous ac using combinations of frequencies

Abstract

PURPOSE:To attain economization while preventing the futility of a sending-back fuction by using an N-tone signal for control information from a master station to a subordinate station and by transmitting sent-back information from the subordinate station to the master station by use of a binary pulse signal. CONSTITUTION:At master station CT, contacts 1Xs, 2Xs,...10Xs supplying two kinds (ON and OFF) of control information (one bit) to control circuit CTL outputting selective signals of numbers of subordinate stations L1-L10 to be selected and to subordinate stations L1-L10 are scanned by SCN on the basis of the output of CTL to select a three-tone frequency, which is transmitted to the common circuit via TM. After receiving a three-tone call signal from the master station by rM1-rM10, subordinate stations L1-L10 recognize whether it is addressed to them or not and output two kinds to control information (one bit) according to the combination of the receiving order of the three-tone signal, so that ON-OFF signals of contacts 1XL, 2XL,...10XL turned ON-OFF according to the states (stop and operation modes) of a terminal equipment to be controlled will be sent to the master station as sent- back information through delay circuits DL1-DL10, and gates G1-G10 for return information transmission.
JP11731479A 1979-09-14 1979-09-14 Information transmission system Pending JPS5642450A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11731479A JPS5642450A (en) 1979-09-14 1979-09-14 Information transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11731479A JPS5642450A (en) 1979-09-14 1979-09-14 Information transmission system

Publications (1)

Publication Number Publication Date
JPS5642450A true JPS5642450A (en) 1981-04-20

Family

ID=14708676

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11731479A Pending JPS5642450A (en) 1979-09-14 1979-09-14 Information transmission system

Country Status (1)

Country Link
JP (1) JPS5642450A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0639644U (en) * 1992-11-05 1994-05-27 富士工業株式会社 Hose fittings for tank truck

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4864905A (en) * 1971-12-08 1973-09-07
JPS5464905A (en) * 1977-11-02 1979-05-25 Kyosan Electric Mfg Information transmission system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4864905A (en) * 1971-12-08 1973-09-07
JPS5464905A (en) * 1977-11-02 1979-05-25 Kyosan Electric Mfg Information transmission system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0639644U (en) * 1992-11-05 1994-05-27 富士工業株式会社 Hose fittings for tank truck

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