JPS5664542A - Data transmission system - Google Patents

Data transmission system

Info

Publication number
JPS5664542A
JPS5664542A JP14017679A JP14017679A JPS5664542A JP S5664542 A JPS5664542 A JP S5664542A JP 14017679 A JP14017679 A JP 14017679A JP 14017679 A JP14017679 A JP 14017679A JP S5664542 A JPS5664542 A JP S5664542A
Authority
JP
Japan
Prior art keywords
data source
data
signal
terminal unit
discrimination
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
JP14017679A
Other languages
Japanese (ja)
Inventor
Toshiaki Mizuta
Takeshi Abe
Seiichi Iwata
Hiroshi Hasebe
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP14017679A priority Critical patent/JPS5664542A/en
Publication of JPS5664542A publication Critical patent/JPS5664542A/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
    • H04Q9/14—Calling by using pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Dc Digital Transmission (AREA)
  • Small-Scale Networks (AREA)
  • Selective Calling Equipment (AREA)

Abstract

PURPOSE:To enhance the function of a terminal unit, by transmitting the data source discrimination signal from the data collecting station to discriminate each data source, detecting the discrimination signal by the data source discrimination signal detecting circuit provided at the terminal unit and then connecting the desired data source to the data collecting station. CONSTITUTION:The oscillator of the data collecting station transmits the data source discrimination signal with a comparatively low frequency, and this signal is detected by the timer circuit 10 of the terminal unit II. After this detection, the circuit 10 supplies the output signal (c) to the PRE terminal of the shift register 13. At the same time, the output signal is delivered to the output line (a) or (b) in accordance with the discrimination of the data source to open the gate circuits G0-G3 or G4-G7, and the data of the electronic counter (data source) 11 or 12 is taken into the register 13.
JP14017679A 1979-10-30 1979-10-30 Data transmission system Pending JPS5664542A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14017679A JPS5664542A (en) 1979-10-30 1979-10-30 Data transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14017679A JPS5664542A (en) 1979-10-30 1979-10-30 Data transmission system

Publications (1)

Publication Number Publication Date
JPS5664542A true JPS5664542A (en) 1981-06-01

Family

ID=15262648

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14017679A Pending JPS5664542A (en) 1979-10-30 1979-10-30 Data transmission system

Country Status (1)

Country Link
JP (1) JPS5664542A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4835484U (en) * 1971-08-27 1973-04-27
JPS5337344A (en) * 1976-09-17 1978-04-06 Ricoh Co Ltd Data collecting system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4835484U (en) * 1971-08-27 1973-04-27
JPS5337344A (en) * 1976-09-17 1978-04-06 Ricoh Co Ltd Data collecting system

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