JPS5683159A - Line control system - Google Patents

Line control system

Info

Publication number
JPS5683159A
JPS5683159A JP16051379A JP16051379A JPS5683159A JP S5683159 A JPS5683159 A JP S5683159A JP 16051379 A JP16051379 A JP 16051379A JP 16051379 A JP16051379 A JP 16051379A JP S5683159 A JPS5683159 A JP S5683159A
Authority
JP
Japan
Prior art keywords
signal
carrier
stations
power supply
cpu12
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
JP16051379A
Other languages
Japanese (ja)
Inventor
Hisashi Matsumura
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.)
Casio Computer Co Ltd
Original Assignee
Casio Computer 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 Casio Computer Co Ltd filed Critical Casio Computer Co Ltd
Priority to JP16051379A priority Critical patent/JPS5683159A/en
Publication of JPS5683159A publication Critical patent/JPS5683159A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/14—Handling requests for interconnection or transfer
    • G06F13/20—Handling requests for interconnection or transfer for access to input/output bus
    • G06F13/22—Handling requests for interconnection or transfer for access to input/output bus using successive scanning, e.g. polling

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Small-Scale Networks (AREA)
  • Communication Control (AREA)

Abstract

PURPOSE:To reduce the number of line cables of multipoint polling system, by transmitting the power supply control signal of work station, error signal and signals such as emergency interruption to the cable performing the data transmission between the center machine and the work station as the specific carrier. CONSTITUTION:The data transmitted from work stations 151-15n is converted into the data possible for processing at a communication controller CCU13 of a center machine 11 and fed to CPU12. Further, the carrier assigned to the power supply ON/OFF signal from the stations 151-15n, error signal and interruption signal is detected at a carrier discriminator 14, the ON/OFF signal of power supply is fed to CPU12 and CCU13, and the error signal and interruption signal are fed to CPU12. Further, the stations 151-15n are provided with CPU16, CCU17 and carrier production section 18, to transmit the power supply control signal of the stations 151-15n, error signal and emergency interruption signal as the carrier and to reduce the number of line cables.
JP16051379A 1979-12-11 1979-12-11 Line control system Pending JPS5683159A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16051379A JPS5683159A (en) 1979-12-11 1979-12-11 Line control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16051379A JPS5683159A (en) 1979-12-11 1979-12-11 Line control system

Publications (1)

Publication Number Publication Date
JPS5683159A true JPS5683159A (en) 1981-07-07

Family

ID=15716567

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16051379A Pending JPS5683159A (en) 1979-12-11 1979-12-11 Line control system

Country Status (1)

Country Link
JP (1) JPS5683159A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59141849A (en) * 1983-02-01 1984-08-14 Matsushita Electric Ind Co Ltd Bidirectional catv system
JPS6161540A (en) * 1984-08-31 1986-03-29 Hitachi Ltd Transmission system of emergency interruption

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59141849A (en) * 1983-02-01 1984-08-14 Matsushita Electric Ind Co Ltd Bidirectional catv system
JPS6161540A (en) * 1984-08-31 1986-03-29 Hitachi Ltd Transmission system of emergency interruption
JPH0535622B2 (en) * 1984-08-31 1993-05-27 Hitachi Ltd

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