JPS5664547A - Calling system for terminal unit - Google Patents

Calling system for terminal unit

Info

Publication number
JPS5664547A
JPS5664547A JP13922779A JP13922779A JPS5664547A JP S5664547 A JPS5664547 A JP S5664547A JP 13922779 A JP13922779 A JP 13922779A JP 13922779 A JP13922779 A JP 13922779A JP S5664547 A JPS5664547 A JP S5664547A
Authority
JP
Japan
Prior art keywords
data
timer
unit
line
sensors
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
JP13922779A
Other languages
Japanese (ja)
Inventor
Masanori Nakazawa
Yuzo Tsuruta
Seiji 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.)
Toshiba Corp
Nippon Telegraph and Telephone Corp
Original Assignee
Toshiba Corp
Nippon Telegraph and Telephone Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Nippon Telegraph and Telephone Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP13922779A priority Critical patent/JPS5664547A/en
Publication of JPS5664547A publication Critical patent/JPS5664547A/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

Abstract

PURPOSE:To simplify the call without losing the reliability of collection of data, by securing such constitution in that each terminal transmits the data successively in response to the common call signal supplied from the center unit. CONSTITUTION:The central unit 1, when starting the collection of data, transmits the call signal to the line 2. The meter sensors 3A, 3B...3N comprise the call detecting circuit connected to the line 2, the timer circuit and the encoder which is connected to the meters 4A, 4B...4N and transmits the data to the line 2 respectively. For the timer circuits incorporated into the sensors 3A, 3B...3N, the set time of the timer differs with every sensor which is started by the call signal sent from the unit 1. The encoder is started after the set time of the timer, and thus the data are transmitted successively to the unit 1 from the sensors 3A, 3B...3N each.
JP13922779A 1979-10-30 1979-10-30 Calling system for terminal unit Pending JPS5664547A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13922779A JPS5664547A (en) 1979-10-30 1979-10-30 Calling system for terminal unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13922779A JPS5664547A (en) 1979-10-30 1979-10-30 Calling system for terminal unit

Publications (1)

Publication Number Publication Date
JPS5664547A true JPS5664547A (en) 1981-06-01

Family

ID=15240447

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13922779A Pending JPS5664547A (en) 1979-10-30 1979-10-30 Calling system for terminal unit

Country Status (1)

Country Link
JP (1) JPS5664547A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01112835A (en) * 1987-10-26 1989-05-01 Sharp Corp Communication system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5143003A (en) * 1974-10-09 1976-04-13 Tokyo Electric Power Co DEETASHUS HUHOSHIKI
JPS537103A (en) * 1976-07-09 1978-01-23 Mitsubishi Electric Corp Polling system
JPS5336121A (en) * 1976-09-14 1978-04-04 Honeywell Inc Data communication system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5143003A (en) * 1974-10-09 1976-04-13 Tokyo Electric Power Co DEETASHUS HUHOSHIKI
JPS537103A (en) * 1976-07-09 1978-01-23 Mitsubishi Electric Corp Polling system
JPS5336121A (en) * 1976-09-14 1978-04-04 Honeywell Inc Data communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01112835A (en) * 1987-10-26 1989-05-01 Sharp Corp Communication system

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