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JPS5669951A - Contention system in multipoint line - Google Patents

Contention system in multipoint line

Info

Publication number
JPS5669951A
JPS5669951A JP14618079A JP14618079A JPS5669951A JP S5669951 A JPS5669951 A JP S5669951A JP 14618079 A JP14618079 A JP 14618079A JP 14618079 A JP14618079 A JP 14618079A JP S5669951 A JPS5669951 A JP S5669951A
Authority
JP
Japan
Prior art keywords
circuit
sequence signal
data
station
selecting sequence
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
JP14618079A
Other languages
Japanese (ja)
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 JP14618079A priority Critical patent/JPS5669951A/en
Publication of JPS5669951A publication Critical patent/JPS5669951A/en
Pending 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)
  • Communication Control (AREA)

Abstract

PURPOSE:To eliminate the polling sequence signal of a control station residing on a circuit at any time, by sending a selecting sequence signal from a tributary station to the control station only when data is generated at the tributary station. CONSTITUTION:Tributary station An which is to send data holds control line 4 at a low level with switch SWn turned on. While receiving line 3 is held at the low level, its signal is supervised by final character detecting circuit 6 and off-delay timer circuit 7 and OR circuit 8 is put into opeation, a certain time after another tributary station outputs the final character of the data or has no data, to supply a high level to AND circuit 9. When the AND conditions are satisfied, FF11 is set through OR circuit 10 to trigger selecting sequence signal generator 12, so that a selecting sequence signal will be sent to receiving line 3.
JP14618079A 1979-11-12 1979-11-12 Contention system in multipoint line Pending JPS5669951A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14618079A JPS5669951A (en) 1979-11-12 1979-11-12 Contention system in multipoint line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14618079A JPS5669951A (en) 1979-11-12 1979-11-12 Contention system in multipoint line

Publications (1)

Publication Number Publication Date
JPS5669951A true JPS5669951A (en) 1981-06-11

Family

ID=15401937

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14618079A Pending JPS5669951A (en) 1979-11-12 1979-11-12 Contention system in multipoint line

Country Status (1)

Country Link
JP (1) JPS5669951A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62220041A (en) * 1986-03-20 1987-09-28 Toshiba Corp Remote supervisory and controlling equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62220041A (en) * 1986-03-20 1987-09-28 Toshiba Corp Remote supervisory and controlling equipment
JPH0671267B2 (en) * 1986-03-20 1994-09-07 株式会社東芝 Remote monitoring controller

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