JPS57113659A - Remote monitor and control system - Google Patents

Remote monitor and control system

Info

Publication number
JPS57113659A
JPS57113659A JP18900380A JP18900380A JPS57113659A JP S57113659 A JPS57113659 A JP S57113659A JP 18900380 A JP18900380 A JP 18900380A JP 18900380 A JP18900380 A JP 18900380A JP S57113659 A JPS57113659 A JP S57113659A
Authority
JP
Japan
Prior art keywords
data
item
circuit
stored
time
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
JP18900380A
Other languages
Japanese (ja)
Inventor
Masamitsu Miyazaki
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 Denshi KK
Original Assignee
Hitachi Denshi KK
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 Denshi KK filed Critical Hitachi Denshi KK
Priority to JP18900380A priority Critical patent/JPS57113659A/en
Publication of JPS57113659A publication Critical patent/JPS57113659A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Selective Calling Equipment (AREA)

Abstract

PURPOSE:To omit the transfer of itemized data and to reduce the time of one transmission cycle, when the data is coincident with the stored itemized data, by storing data of items at the time of transmission for each item and comparing the data of an item in each transmission cycle with stored data. CONSTITUTION:A slave device 1 and a master device 8 are connected with a transmission line L to constitute a remote monitor control system which sequentially transmits multi-item data repetitively. The multi-item data from a signal input/output control circuit 5 of the slave device 1 is inputted to a signal discrimination circuit 15 with a specified order, the change in measuring and monitor signals is judged and the result of discrimination is given to a coding circuit 25. At the first transmission cycle, the item discrimination signal and the item data are transmitted to the circuit 25, and the item data is stored in a memory in the circuit 15. At the transmission cycle on and after, the item data at the point of time is compared with the stored data, and if they are different, the discrimination signal and the item data are transmitted and the content of memory is replaced with the item data at the point of time.
JP18900380A 1980-12-29 1980-12-29 Remote monitor and control system Pending JPS57113659A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18900380A JPS57113659A (en) 1980-12-29 1980-12-29 Remote monitor and control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18900380A JPS57113659A (en) 1980-12-29 1980-12-29 Remote monitor and control system

Publications (1)

Publication Number Publication Date
JPS57113659A true JPS57113659A (en) 1982-07-15

Family

ID=16233666

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18900380A Pending JPS57113659A (en) 1980-12-29 1980-12-29 Remote monitor and control system

Country Status (1)

Country Link
JP (1) JPS57113659A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5417604A (en) * 1977-07-08 1979-02-09 Mitsubishi Electric Corp Information transmitter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5417604A (en) * 1977-07-08 1979-02-09 Mitsubishi Electric Corp Information transmitter

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