JPS5535528A - Communication control system - Google Patents

Communication control system

Info

Publication number
JPS5535528A
JPS5535528A JP10855078A JP10855078A JPS5535528A JP S5535528 A JPS5535528 A JP S5535528A JP 10855078 A JP10855078 A JP 10855078A JP 10855078 A JP10855078 A JP 10855078A JP S5535528 A JPS5535528 A JP S5535528A
Authority
JP
Japan
Prior art keywords
polling
terminal
failed
terminals
time
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
JP10855078A
Other languages
Japanese (ja)
Inventor
Takamasa Koga
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP10855078A priority Critical patent/JPS5535528A/en
Publication of JPS5535528A publication Critical patent/JPS5535528A/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
    • H04L12/40169—Flexible bus arrangements
    • 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

Abstract

PURPOSE:To implement polling efficiently even when a failed terminal is present, and also smoothly perform line occupation at simultameous returning time of plural failed terminals through providing a timer and memory in communication control equipment. CONSTITUTION:First, the terminal status display of memory 13 in communication control device 11 is caused all to be a normal status, and it is arranged to be able to implement polling to all terminals. Also, memory to store return priority is also is zero. When polling is started and a failed terminal took place, number is given according to order of the taking place to the failed terminals, and the time difference tn between order of failure and failure recognition is stored. On the other hand, at the same time of taking place of a failed terminal, a timer 12 starts its operation, and it stops the polling to the terminal only for a specified time T. After each time of T, T+t1,...T+t1+-tn passed, it stops temporarily normal polling, and performs diagnostic polling to failed terminals, and waits for reopening request for polling from a normally returned terminal.
JP10855078A 1978-09-06 1978-09-06 Communication control system Pending JPS5535528A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10855078A JPS5535528A (en) 1978-09-06 1978-09-06 Communication control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10855078A JPS5535528A (en) 1978-09-06 1978-09-06 Communication control system

Publications (1)

Publication Number Publication Date
JPS5535528A true JPS5535528A (en) 1980-03-12

Family

ID=14487670

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10855078A Pending JPS5535528A (en) 1978-09-06 1978-09-06 Communication control system

Country Status (1)

Country Link
JP (1) JPS5535528A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57133740A (en) * 1981-02-12 1982-08-18 Mitsubishi Electric Corp Control method for transmission system
JPS5871748A (en) * 1981-10-23 1983-04-28 Mitsubishi Electric Corp Controlling system for data transmission
JPS5939143A (en) * 1982-08-30 1984-03-03 Casio Comput Co Ltd Polling system
JPS5945742A (en) * 1982-09-08 1984-03-14 Omron Tateisi Electronics Co Polling transmission system
JPS59110246A (en) * 1982-12-15 1984-06-26 Meidensha Electric Mfg Co Ltd Slave station selection system of 1:n information transmission system
JPS6046152A (en) * 1983-08-23 1985-03-12 Nec Corp Testing system of data communication circuit
JPS6053358A (en) * 1983-09-02 1985-03-27 Fujitsu Ltd Polling control method
JPS60233960A (en) * 1984-05-04 1985-11-20 Asics Corp Communication system for central equipment and plural terminal equipments
JPS62136949A (en) * 1985-12-10 1987-06-19 Fujitsu Ltd System for correcting total error
JPS62217750A (en) * 1986-03-19 1987-09-25 Fujitsu Ltd Line fault part sectioning system in branched line
JPH0215741A (en) * 1988-07-01 1990-01-19 Matsushita Electric Ind Co Ltd Method for controlling sending of poling
JPH08307434A (en) * 1995-05-11 1996-11-22 Nec Corp Multi-access communication system

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57133740A (en) * 1981-02-12 1982-08-18 Mitsubishi Electric Corp Control method for transmission system
JPS5871748A (en) * 1981-10-23 1983-04-28 Mitsubishi Electric Corp Controlling system for data transmission
JPS5939143A (en) * 1982-08-30 1984-03-03 Casio Comput Co Ltd Polling system
JPS5945742A (en) * 1982-09-08 1984-03-14 Omron Tateisi Electronics Co Polling transmission system
JPS59110246A (en) * 1982-12-15 1984-06-26 Meidensha Electric Mfg Co Ltd Slave station selection system of 1:n information transmission system
JPS6046152A (en) * 1983-08-23 1985-03-12 Nec Corp Testing system of data communication circuit
JPS6053358A (en) * 1983-09-02 1985-03-27 Fujitsu Ltd Polling control method
JPS60233960A (en) * 1984-05-04 1985-11-20 Asics Corp Communication system for central equipment and plural terminal equipments
JPS62136949A (en) * 1985-12-10 1987-06-19 Fujitsu Ltd System for correcting total error
JPS62217750A (en) * 1986-03-19 1987-09-25 Fujitsu Ltd Line fault part sectioning system in branched line
JPH0215741A (en) * 1988-07-01 1990-01-19 Matsushita Electric Ind Co Ltd Method for controlling sending of poling
JPH08307434A (en) * 1995-05-11 1996-11-22 Nec Corp Multi-access communication system

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