JPS5634257A - Data transmission system with automatic - Google Patents

Data transmission system with automatic

Info

Publication number
JPS5634257A
JPS5634257A JP10902179A JP10902179A JPS5634257A JP S5634257 A JPS5634257 A JP S5634257A JP 10902179 A JP10902179 A JP 10902179A JP 10902179 A JP10902179 A JP 10902179A JP S5634257 A JPS5634257 A JP S5634257A
Authority
JP
Japan
Prior art keywords
circuit
signal line
line short
slave
short
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.)
Granted
Application number
JP10902179A
Other languages
Japanese (ja)
Other versions
JPS6119190B2 (en
Inventor
Kikuo Kawasaki
Tomomi Sano
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP10902179A priority Critical patent/JPS5634257A/en
Publication of JPS5634257A publication Critical patent/JPS5634257A/en
Publication of JPS6119190B2 publication Critical patent/JPS6119190B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Abstract

PURPOSE:To detect automatically a signal line short-circuit faulty slave station, by providing a switch in series with the signal line short-circuit element of slave stations in the system where the data code is transmitted and received by short-circuit of signal lines connected to the master station and plural slave stations. CONSTITUTION:The slave station connected to the master station by signal lines 3 and 4 is provided with signal line short-circuit switching element transistor Tr and the semiconductor element of Zener diodes ZD1 and ZD2 of the surge voltage suppressing circuit element of signal lines. Since the cause of signal line short-circuit fault occurrence is this semiconductor element, contact RLb of relay RL is provided in series with this element. In each slave station, when the short-circuit state of signal lines 3 and 4 continues for a long time of a prescribed time or more, transmission and receiving circuit 7 detects it to drive relay RL and open contact RLb. Under this state, the address signal for slave stations is generated from the master station to operate relays RL of slave stations successively, and contact RLb is closed to detect a signal line short-circuit fault occurrence slave station.
JP10902179A 1979-08-29 1979-08-29 Data transmission system with automatic Granted JPS5634257A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10902179A JPS5634257A (en) 1979-08-29 1979-08-29 Data transmission system with automatic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10902179A JPS5634257A (en) 1979-08-29 1979-08-29 Data transmission system with automatic

Publications (2)

Publication Number Publication Date
JPS5634257A true JPS5634257A (en) 1981-04-06
JPS6119190B2 JPS6119190B2 (en) 1986-05-16

Family

ID=14499573

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10902179A Granted JPS5634257A (en) 1979-08-29 1979-08-29 Data transmission system with automatic

Country Status (1)

Country Link
JP (1) JPS5634257A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5951745A (en) * 1982-09-16 1984-03-26 Fujisawa Nebokedou:Kk Preparation of cake using bean-curd refuse as raw material
JPS59154938A (en) * 1983-02-21 1984-09-04 Tomiko Seki Preparation of cake
JPS6261567A (en) * 1985-09-13 1987-03-18 Yasuo Shimizu Production of food and food raw material from defatted soybean or such

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5951745A (en) * 1982-09-16 1984-03-26 Fujisawa Nebokedou:Kk Preparation of cake using bean-curd refuse as raw material
JPS614496B2 (en) * 1982-09-16 1986-02-10 Fujisawa Nebokedo Kk
JPS59154938A (en) * 1983-02-21 1984-09-04 Tomiko Seki Preparation of cake
JPS6261567A (en) * 1985-09-13 1987-03-18 Yasuo Shimizu Production of food and food raw material from defatted soybean or such
JPS635067B2 (en) * 1985-09-13 1988-02-02 Yasuo Shimizu

Also Published As

Publication number Publication date
JPS6119190B2 (en) 1986-05-16

Similar Documents

Publication Publication Date Title
US3970898A (en) Method of automatically isolating a faulty section of a power line belonging to an electrical energy supply network, and arrangement for carrying out this method
JPS57157661A (en) Transmission line switching system
JPS5634257A (en) Data transmission system with automatic
GB1391364A (en) Repeater fault localisation system
GB992690A (en) Improvements in or relating to electric communication systems
JPS5690655A (en) Wire transmission system
JPS54139419A (en) Switching system for double-system transmission line
US2657336A (en) Communication signal lamp control circuit
JPS56125141A (en) Pulse signal transmission system
SU643933A1 (en) Process signalling device
JPS56149851A (en) Looplike data transmission equipment
JP2642427B2 (en) Automatic recovery operation device for distribution system
JPS5567252A (en) Stand-by circuit switching system
JPS56119570A (en) Emergency communication system
JPS5725743A (en) Maintenance system of radio telephone system
JPS5792951A (en) Signal transmission system
JPS5762652A (en) Trunk line switching system for disconnection fault by blow of fuse
JPS5660121A (en) Circuit switching system
JPS5795744A (en) Automatic line switching device for data communication device
SU1010595A1 (en) Object remote control device
JPS6447145A (en) Multiplex transmission equipment
JPS5687961A (en) Multidrop transmitter
JPS5762644A (en) Supervisory system for multiplex communication line
JPS56124903A (en) Mobile monitoring equipment
JPS55161431A (en) Carrier wave current source switching circuit