JPS5671354A - Multidrop data communication system - Google Patents

Multidrop data communication system

Info

Publication number
JPS5671354A
JPS5671354A JP14731679A JP14731679A JPS5671354A JP S5671354 A JPS5671354 A JP S5671354A JP 14731679 A JP14731679 A JP 14731679A JP 14731679 A JP14731679 A JP 14731679A JP S5671354 A JPS5671354 A JP S5671354A
Authority
JP
Japan
Prior art keywords
data communication
station
slave
current
multidrop
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
JP14731679A
Other languages
Japanese (ja)
Other versions
JPS58219B2 (en
Inventor
Sanai Hamaguchi
Harumichi Sato
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.)
Shinko Electric Co Ltd
Original Assignee
Shinko 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 Shinko Electric Co Ltd filed Critical Shinko Electric Co Ltd
Priority to JP54147316A priority Critical patent/JPS58219B2/en
Publication of JPS5671354A publication Critical patent/JPS5671354A/en
Publication of JPS58219B2 publication Critical patent/JPS58219B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/403—Bus networks with centralised control, e.g. polling

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE:To perform the data communication of contention system, by using multidrop lines, by flowing a current to a resistor at the slave station nearest the control station side among the slave stations in data transfer request state, and obtaining a single main station based on the current value. CONSTITUTION:A control station 4 has a transmission state detection section 5 so that a current flows to a resistor R71 of a slave station 11 nearest the control station 4 among a plurality of slave stations 1 in data transfer request state. Further, a digital signal in response to the value of this current is obtained and this digital signal produces a single slave station 1 to be the main station. Thus, the data communication of contension system can be made by using the multidrop data communication system.
JP54147316A 1979-11-14 1979-11-14 Multi-drop data communication method Expired JPS58219B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54147316A JPS58219B2 (en) 1979-11-14 1979-11-14 Multi-drop data communication method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54147316A JPS58219B2 (en) 1979-11-14 1979-11-14 Multi-drop data communication method

Publications (2)

Publication Number Publication Date
JPS5671354A true JPS5671354A (en) 1981-06-13
JPS58219B2 JPS58219B2 (en) 1983-01-05

Family

ID=15427424

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54147316A Expired JPS58219B2 (en) 1979-11-14 1979-11-14 Multi-drop data communication method

Country Status (1)

Country Link
JP (1) JPS58219B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59123236U (en) * 1983-02-08 1984-08-20 松下電器産業株式会社 Outlet grill of underfloor concealed air conditioner
JPH0545493Y2 (en) * 1987-11-10 1993-11-19

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4710410U (en) * 1971-03-03 1972-10-07

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4710410U (en) * 1971-03-03 1972-10-07

Also Published As

Publication number Publication date
JPS58219B2 (en) 1983-01-05

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