JPS5760757A - Signal transmission system - Google Patents

Signal transmission system

Info

Publication number
JPS5760757A
JPS5760757A JP55134338A JP13433880A JPS5760757A JP S5760757 A JPS5760757 A JP S5760757A JP 55134338 A JP55134338 A JP 55134338A JP 13433880 A JP13433880 A JP 13433880A JP S5760757 A JPS5760757 A JP S5760757A
Authority
JP
Japan
Prior art keywords
slave
station
data
slave stations
slave station
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
JP55134338A
Other languages
Japanese (ja)
Inventor
Kenichi Morita
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 JP55134338A priority Critical patent/JPS5760757A/en
Publication of JPS5760757A publication Critical patent/JPS5760757A/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

Abstract

PURPOSE:To shorten time required for data gathering to obtain data of slave stations in a short period, by receiving and analyzing the response request signal from a master station in each slave station and by causing a slave station to transmit the carrier wave, by which data is carried, simultaneously with receiving of the next response request when the slave station discriminates that the slave station itself should respond next. CONSTITUTION:Plural slave stations 7A-7C are connected to a transmission line 1, and a data gathering command (polling) is transmitted to slave stations 7A-7C successively from a master station 2 connected to this transmission line 1, and designated slave stations 7A-7C return gathered data to the master station 2. An information transmission device 9 provided between a data processing device 8 and demodulating and modulating circuits 11 and 10 in each of slave stations 7A- 7C is provided with a synchronizing detecting circuit 12, an error check circuit 13, a station address control code analyzing circuit 14, an error code adding circuit 15, and a synchronizing code adding circuit 16. The response request from the master station 2 is analyzed by each of slave stations 7A-7C; and when a slave station receives next the request to the slave station itself, the slave station transmits the carrier wave for carrying data, thereby shortening the data gathering time.
JP55134338A 1980-09-29 1980-09-29 Signal transmission system Pending JPS5760757A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55134338A JPS5760757A (en) 1980-09-29 1980-09-29 Signal transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55134338A JPS5760757A (en) 1980-09-29 1980-09-29 Signal transmission system

Publications (1)

Publication Number Publication Date
JPS5760757A true JPS5760757A (en) 1982-04-12

Family

ID=15126009

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55134338A Pending JPS5760757A (en) 1980-09-29 1980-09-29 Signal transmission system

Country Status (1)

Country Link
JP (1) JPS5760757A (en)

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