JPS5671352A - Multidrop data communication system - Google Patents

Multidrop data communication system

Info

Publication number
JPS5671352A
JPS5671352A JP14731479A JP14731479A JPS5671352A JP S5671352 A JPS5671352 A JP S5671352A JP 14731479 A JP14731479 A JP 14731479A JP 14731479 A JP14731479 A JP 14731479A JP S5671352 A JPS5671352 A JP S5671352A
Authority
JP
Japan
Prior art keywords
circuit
slave stations
output
sequence
communication system
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
JP14731479A
Other languages
Japanese (ja)
Other versions
JPS6014547B2 (en
Inventor
Harumichi Sato
Sanai Hamaguchi
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 JP54147314A priority Critical patent/JPS6014547B2/en
Publication of JPS5671352A publication Critical patent/JPS5671352A/en
Publication of JPS6014547B2 publication Critical patent/JPS6014547B2/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

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

Abstract

PURPOSE:To reduce the amount of communication transmission, by transmitting the selected sequence in a specific timing for time sharing of each slave station when the transfer of the character sequence is absent, in the multidrop data communication system of contention system. CONSTITUTION:A plurality of slave stations 111, 112 are in branch connection to a control station 14 with transmission line 12 and reception line 13. Further, if the transfer of character sequence is interrupted for a given time or more on the reception line 13, a time sharing timing circuit 19 transmits the output of ''1'' in a given timing to one input terminal of an AND circuit 23 based on the output of an off-delay timer 17 in the slave stations 111, 112. On the other hand, the output of ''1'' is input to another input terminal of the circuit 23 of an AND circuit of the slave stations 111, 112, based on the data transfer request. Accordingly, the selective sequence is transmitted from a selective sequence generator 20 of the slave stations. Thus, the amount of communication transmission can be reduced.
JP54147314A 1979-11-14 1979-11-14 Multi-drop data communication method Expired JPS6014547B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54147314A JPS6014547B2 (en) 1979-11-14 1979-11-14 Multi-drop data communication method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54147314A JPS6014547B2 (en) 1979-11-14 1979-11-14 Multi-drop data communication method

Publications (2)

Publication Number Publication Date
JPS5671352A true JPS5671352A (en) 1981-06-13
JPS6014547B2 JPS6014547B2 (en) 1985-04-13

Family

ID=15427383

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54147314A Expired JPS6014547B2 (en) 1979-11-14 1979-11-14 Multi-drop data communication method

Country Status (1)

Country Link
JP (1) JPS6014547B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63121931U (en) * 1987-02-02 1988-08-08
JPH01174022A (en) * 1987-12-28 1989-07-10 Matsushita Electric Ind Co Ltd Fm receiver

Also Published As

Publication number Publication date
JPS6014547B2 (en) 1985-04-13

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