JPS5672555A - Data transmission system - Google Patents

Data transmission system

Info

Publication number
JPS5672555A
JPS5672555A JP14768879A JP14768879A JPS5672555A JP S5672555 A JPS5672555 A JP S5672555A JP 14768879 A JP14768879 A JP 14768879A JP 14768879 A JP14768879 A JP 14768879A JP S5672555 A JPS5672555 A JP S5672555A
Authority
JP
Japan
Prior art keywords
data
signal
central unit
serially
receives
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
JP14768879A
Other languages
Japanese (ja)
Inventor
Akihisa Ueda
Ryoichi Abe
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 Ltd
Original Assignee
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 Ltd filed Critical Hitachi Ltd
Priority to JP14768879A priority Critical patent/JPS5672555A/en
Publication of JPS5672555A publication Critical patent/JPS5672555A/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)
  • Small-Scale Networks (AREA)
  • Selective Calling Equipment (AREA)

Abstract

PURPOSE:To efficiently transmit a data and decrease the number of cables, by starting the central unit by the calling signal from one optional terminal, and also serially transmitting a data. CONSTITUTION:In the terminal for transmitting a data, for instance, an in-stock card is manually set to the data input unit, and the start switch 24 is turned on. And the terminal device 2 holds a data of the self-intrinsic No. in the memory part 21 temporarily, this data is converted in sereis by the converting part 201, and it is serially transmitted to the central unit 1. The central unit 1 receives this signal, and in case of a data receivable state, a data transmission approval signal is replied serially. The terminal device 2 receives this signal, and serially transmits a data from the data input part 24 to the cable 3 through the memory part 21, the converting part 201 and the signal transmitter 220. The central unit 1 receives this signal and executes various processings.
JP14768879A 1979-11-16 1979-11-16 Data transmission system Pending JPS5672555A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14768879A JPS5672555A (en) 1979-11-16 1979-11-16 Data transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14768879A JPS5672555A (en) 1979-11-16 1979-11-16 Data transmission system

Publications (1)

Publication Number Publication Date
JPS5672555A true JPS5672555A (en) 1981-06-16

Family

ID=15436026

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14768879A Pending JPS5672555A (en) 1979-11-16 1979-11-16 Data transmission system

Country Status (1)

Country Link
JP (1) JPS5672555A (en)

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