JPS5789354A - Distributed automatic testing device based on loop transmission system - Google Patents

Distributed automatic testing device based on loop transmission system

Info

Publication number
JPS5789354A
JPS5789354A JP55165358A JP16535880A JPS5789354A JP S5789354 A JPS5789354 A JP S5789354A JP 55165358 A JP55165358 A JP 55165358A JP 16535880 A JP16535880 A JP 16535880A JP S5789354 A JPS5789354 A JP S5789354A
Authority
JP
Japan
Prior art keywords
transmission
data
control devices
interruption information
data transmission
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
JP55165358A
Other languages
Japanese (ja)
Inventor
Yoshitaka Hisama
Kenichiro Kuriyama
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 Sanki Engineering Co Ltd
Hitachi Ltd
Hitachi Plant Technologies Ltd
Original Assignee
Hitachi Sanki Engineering Co Ltd
Hitachi Techno Engineering Co Ltd
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 Sanki Engineering Co Ltd, Hitachi Techno Engineering Co Ltd, Hitachi Ltd filed Critical Hitachi Sanki Engineering Co Ltd
Priority to JP55165358A priority Critical patent/JPS5789354A/en
Publication of JPS5789354A publication Critical patent/JPS5789354A/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]
    • H04L12/42—Loop networks

Abstract

PURPOSE:To eliminate the transmission dalay of urgent data and prevent data of a low transmission priority from interfering with the execution of a test, by connecting a transmission control device and a terminal control device by a data transmission line and an interruption information transmission line to exchange interruption information before the data transmission. CONSTITUTION:Communication control devices 12A, 12B, and 12C are connected to a loop transmitter 11 for data transmission. Terminal control devices 15A, 15B, and 15C are connected to respective communication control devices by data lines 13A, 13B, and 13C and interruption information lines 14A, 14B, and 14C. Respective transmission control devices and terminal control devices exchange interruption information before the data transmission to determine priorities of transmission, and these priorities and priorities of interruption control tasks are compared with each other to determine whether data transmission is necessary or not.
JP55165358A 1980-11-26 1980-11-26 Distributed automatic testing device based on loop transmission system Pending JPS5789354A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55165358A JPS5789354A (en) 1980-11-26 1980-11-26 Distributed automatic testing device based on loop transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55165358A JPS5789354A (en) 1980-11-26 1980-11-26 Distributed automatic testing device based on loop transmission system

Publications (1)

Publication Number Publication Date
JPS5789354A true JPS5789354A (en) 1982-06-03

Family

ID=15810843

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55165358A Pending JPS5789354A (en) 1980-11-26 1980-11-26 Distributed automatic testing device based on loop transmission system

Country Status (1)

Country Link
JP (1) JPS5789354A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6048560A (en) * 1983-08-25 1985-03-16 Fujitsu Ltd Self-diagnosing system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5473532A (en) * 1977-11-25 1979-06-12 Toshiba Corp Process input/output unit
JPS5492039A (en) * 1977-12-29 1979-07-20 Fuji Electric Co Ltd Data collection and display system of process instrumentation control unit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5473532A (en) * 1977-11-25 1979-06-12 Toshiba Corp Process input/output unit
JPS5492039A (en) * 1977-12-29 1979-07-20 Fuji Electric Co Ltd Data collection and display system of process instrumentation control unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6048560A (en) * 1983-08-25 1985-03-16 Fujitsu Ltd Self-diagnosing system
JPH037984B2 (en) * 1983-08-25 1991-02-04 Fujitsu Ltd

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