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JPS55138948A - Circuit control system - Google Patents

Circuit control system

Info

Publication number
JPS55138948A
JPS55138948A JP4773779A JP4773779A JPS55138948A JP S55138948 A JPS55138948 A JP S55138948A JP 4773779 A JP4773779 A JP 4773779A JP 4773779 A JP4773779 A JP 4773779A JP S55138948 A JPS55138948 A JP S55138948A
Authority
JP
Japan
Prior art keywords
circuit
data
channel
loop
control 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.)
Pending
Application number
JP4773779A
Other languages
Japanese (ja)
Inventor
Tsugio Sugawara
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP4773779A priority Critical patent/JPS55138948A/en
Publication of JPS55138948A publication Critical patent/JPS55138948A/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]
    • H04L12/42—Loop networks
    • H04L12/423—Loop 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 realize a circuit control system which raises the initial cost little and is rich in extensibility, by mutually connecting the circuit scanning part and the circuit corresponding part in a loop. CONSTITUTION:The circuit scanning part 50 in the circuit control unit (CCU) 5 and the circuit corresponding parts 61-6n in the line unit (LUT) 6 are connected by a loop network 7. In the loop 7, a data goes round in one direction in the format of byte as time sharing on the data channel which is made to correspond to each circuit corresponding part. Each circuit corresponding part 61-6n consists of a receiver 611, a driver 612 and a line adaptor 613, receivers a data from the channel corresponding to itself, and transmits a transmission data to this channel. The circuit scanning part 50 receives a data from the channel corresponding to the object circuit corresponding part, and transmits a data to this channel.
JP4773779A 1979-04-18 1979-04-18 Circuit control system Pending JPS55138948A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4773779A JPS55138948A (en) 1979-04-18 1979-04-18 Circuit control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4773779A JPS55138948A (en) 1979-04-18 1979-04-18 Circuit control system

Publications (1)

Publication Number Publication Date
JPS55138948A true JPS55138948A (en) 1980-10-30

Family

ID=12783649

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4773779A Pending JPS55138948A (en) 1979-04-18 1979-04-18 Circuit control system

Country Status (1)

Country Link
JP (1) JPS55138948A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01112850A (en) * 1987-10-26 1989-05-01 Hitachi Ltd Pseudo loop transmission system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01112850A (en) * 1987-10-26 1989-05-01 Hitachi Ltd Pseudo loop transmission system

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