JPS57101442A - Controller for unattended slave station - Google Patents

Controller for unattended slave station

Info

Publication number
JPS57101442A
JPS57101442A JP17825880A JP17825880A JPS57101442A JP S57101442 A JPS57101442 A JP S57101442A JP 17825880 A JP17825880 A JP 17825880A JP 17825880 A JP17825880 A JP 17825880A JP S57101442 A JPS57101442 A JP S57101442A
Authority
JP
Japan
Prior art keywords
slave station
common signal
unattended
message section
telegraphic message
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
JP17825880A
Other languages
Japanese (ja)
Inventor
Shigeru Honda
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP17825880A priority Critical patent/JPS57101442A/en
Publication of JPS57101442A publication Critical patent/JPS57101442A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To achieve a controller for an unattended slave station, by using a telegraphic message section of an existing communication line if a common signal line is not usable and eliminating a station in failure from the system. CONSTITUTION:If a common signal line device 7 is in failure in an unattended slave station and a common signal line can not be used by other stations, a master station gives a disconnection instruction to a slave station via a telegraphic message section of a communication line. This instruction is fetched on the way of the telegraphic message section of the said slave station received via a communication line device 9 and when the disconnection instruction is confirmed at a code selection circuit 12, an interruption is given to a control computer 8. Thus, even if the telegraphic message section makes normal operation, although all the codes are inputted to a code selection circuit 12, the said circuit selects the disconnection instruction only, switches a device 7 to off-lines and avoids the use of common signal lines.
JP17825880A 1980-12-16 1980-12-16 Controller for unattended slave station Pending JPS57101442A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17825880A JPS57101442A (en) 1980-12-16 1980-12-16 Controller for unattended slave station

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17825880A JPS57101442A (en) 1980-12-16 1980-12-16 Controller for unattended slave station

Publications (1)

Publication Number Publication Date
JPS57101442A true JPS57101442A (en) 1982-06-24

Family

ID=16045342

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17825880A Pending JPS57101442A (en) 1980-12-16 1980-12-16 Controller for unattended slave station

Country Status (1)

Country Link
JP (1) JPS57101442A (en)

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