JPS5578653A - Data transmission system - Google Patents

Data transmission system

Info

Publication number
JPS5578653A
JPS5578653A JP15209378A JP15209378A JPS5578653A JP S5578653 A JPS5578653 A JP S5578653A JP 15209378 A JP15209378 A JP 15209378A JP 15209378 A JP15209378 A JP 15209378A JP S5578653 A JPS5578653 A JP S5578653A
Authority
JP
Japan
Prior art keywords
fault
station
relay
exciting
stations
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
JP15209378A
Other languages
Japanese (ja)
Inventor
Takao Honna
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15209378A priority Critical patent/JPS5578653A/en
Publication of JPS5578653A publication Critical patent/JPS5578653A/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
    • H04L12/437—Ring fault isolation or reconfiguration

Landscapes

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

Abstract

PURPOSE:To enhance the reliability for the decentralized process system combined into a ring form by securing he double-structure for the station. CONSTITUTION:Stations ST1-1-STn-1 are connected to the data line via the relay which becomes non-exciting when the fault occurs. Here if some fault is detected to the operation of station ST1-1, the fault signal is transmitted to station ST1-2 via the fault detector circuit to inform the fault occurrence to higher-rank computer CPU0 via ST1-2. In this case, the relay of ST1-1 becomes non-exciting, and the relay of ST1-2 is excited instead. And an automatic switching is given to station ST1-2. At the same time, the fact that the both stations are faulty is known of the fault signal, and thus the both relays are made non-existing to make the data pass. In such way, the effect can be avoided to other computers.
JP15209378A 1978-12-11 1978-12-11 Data transmission system Pending JPS5578653A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15209378A JPS5578653A (en) 1978-12-11 1978-12-11 Data transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15209378A JPS5578653A (en) 1978-12-11 1978-12-11 Data transmission system

Publications (1)

Publication Number Publication Date
JPS5578653A true JPS5578653A (en) 1980-06-13

Family

ID=15532884

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15209378A Pending JPS5578653A (en) 1978-12-11 1978-12-11 Data transmission system

Country Status (1)

Country Link
JP (1) JPS5578653A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02192342A (en) * 1989-01-20 1990-07-30 Nec Corp Secondary station device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02192342A (en) * 1989-01-20 1990-07-30 Nec Corp Secondary station device

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