JPS52107487A - Data transmission device for 1,n type distant observing controller wit h multi-drop - Google Patents

Data transmission device for 1,n type distant observing controller wit h multi-drop

Info

Publication number
JPS52107487A
JPS52107487A JP2321376A JP2321376A JPS52107487A JP S52107487 A JPS52107487 A JP S52107487A JP 2321376 A JP2321376 A JP 2321376A JP 2321376 A JP2321376 A JP 2321376A JP S52107487 A JPS52107487 A JP S52107487A
Authority
JP
Japan
Prior art keywords
wit
drop
data transmission
transmission device
observing
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
JP2321376A
Other languages
Japanese (ja)
Inventor
Hiromichi Nishikubo
Yasushi Hashimoto
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 JP2321376A priority Critical patent/JPS52107487A/en
Publication of JPS52107487A publication Critical patent/JPS52107487A/en
Pending 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2209/00—Arrangements in telecontrol or telemetry systems
    • H04Q2209/70—Arrangements in the main station, i.e. central controller
    • H04Q2209/75—Arrangements in the main station, i.e. central controller by polling or interrogating the sub-stations

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Small-Scale Networks (AREA)
  • Selective Calling Equipment (AREA)

Abstract

PURPOSE:To perform an effective observation at a system composed of a keystation and two or more substations connected to it by a mutual circuit by making longer a transmission command period of a condition indicating data to be sent to the substations from the key-station than that of measurement data.
JP2321376A 1976-03-05 1976-03-05 Data transmission device for 1,n type distant observing controller wit h multi-drop Pending JPS52107487A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2321376A JPS52107487A (en) 1976-03-05 1976-03-05 Data transmission device for 1,n type distant observing controller wit h multi-drop

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2321376A JPS52107487A (en) 1976-03-05 1976-03-05 Data transmission device for 1,n type distant observing controller wit h multi-drop

Publications (1)

Publication Number Publication Date
JPS52107487A true JPS52107487A (en) 1977-09-09

Family

ID=12104374

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2321376A Pending JPS52107487A (en) 1976-03-05 1976-03-05 Data transmission device for 1,n type distant observing controller wit h multi-drop

Country Status (1)

Country Link
JP (1) JPS52107487A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58210742A (en) * 1982-05-21 1983-12-08 シ−メンス・アクチエンゲゼルシヤフト Data aquisition device
JPS6123439A (en) * 1984-07-11 1986-01-31 Hitachi Ltd Data transmission system in decentralized type plant supervisory controller
JPS61203748A (en) * 1985-03-07 1986-09-09 Yamatake Honeywell Co Ltd Selective display control method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58210742A (en) * 1982-05-21 1983-12-08 シ−メンス・アクチエンゲゼルシヤフト Data aquisition device
JPS6123439A (en) * 1984-07-11 1986-01-31 Hitachi Ltd Data transmission system in decentralized type plant supervisory controller
JPS61203748A (en) * 1985-03-07 1986-09-09 Yamatake Honeywell Co Ltd Selective display control method

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