JPS5537020A - Remote monitoring control device - Google Patents

Remote monitoring control device

Info

Publication number
JPS5537020A
JPS5537020A JP10971578A JP10971578A JPS5537020A JP S5537020 A JPS5537020 A JP S5537020A JP 10971578 A JP10971578 A JP 10971578A JP 10971578 A JP10971578 A JP 10971578A JP S5537020 A JPS5537020 A JP S5537020A
Authority
JP
Japan
Prior art keywords
photocoupler
turned
parent portion
parent
signals
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
JP10971578A
Other languages
Japanese (ja)
Inventor
Hiromichi Nishikubo
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 JP10971578A priority Critical patent/JPS5537020A/en
Publication of JPS5537020A publication Critical patent/JPS5537020A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/24—Testing correct operation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Selective Calling Equipment (AREA)

Abstract

PURPOSE:To simply test the safety from the photocoupler to the parent portion indicating light by turning ON and OFF the photocoupler of the slave portion display input portion by the test signal of ON and OFF from the parent portion device. CONSTITUTION:In accordance with the operation of ON test switch in the parent portion, when the test signal 31 is transmitted from the parent portion, AND gate 33 is brought into low level and the photocoupler 35 is turned ON. Thus, the displaying photocouplers 23-1 to 23-10 are all turned ON and the signals of the data bus 4 are transferred as low level signals to the parent portion. When from the parent portion, OFF test signal 32 is transmitted, AND gate 34 becomes high level and photocoupler 36 is turned OFF and the displaying input photo coupler 23-1 to 23-10 are all turned OFF and the signals of the data bus 4 are all transmitted to the parent portion as high level signals.
JP10971578A 1978-09-08 1978-09-08 Remote monitoring control device Pending JPS5537020A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10971578A JPS5537020A (en) 1978-09-08 1978-09-08 Remote monitoring control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10971578A JPS5537020A (en) 1978-09-08 1978-09-08 Remote monitoring control device

Publications (1)

Publication Number Publication Date
JPS5537020A true JPS5537020A (en) 1980-03-14

Family

ID=14517380

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10971578A Pending JPS5537020A (en) 1978-09-08 1978-09-08 Remote monitoring control device

Country Status (1)

Country Link
JP (1) JPS5537020A (en)

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