JPS5715548A - Polling monitor system - Google Patents
Polling monitor systemInfo
- Publication number
- JPS5715548A JPS5715548A JP8919680A JP8919680A JPS5715548A JP S5715548 A JPS5715548 A JP S5715548A JP 8919680 A JP8919680 A JP 8919680A JP 8919680 A JP8919680 A JP 8919680A JP S5715548 A JPS5715548 A JP S5715548A
- Authority
- JP
- Japan
- Prior art keywords
- monitor station
- priority
- station
- monitor
- call out
- 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
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
Abstract
PURPOSE:To prevent the double polling call out to a station to be monitored, by providing a priority discrimination circuit at each monitoring station and transmitting a polling call out carrier through the priority of a monitor station. CONSTITUTION:When a failure takes place in a monitor station 1 and a polling call out carrier A stops, monitor stations 2, 3 start counting clock pulses. Further, a polling call out carrier B is transmitted from only the monitor station 2 having a shorter delay time. Further, in the monitor station 3, a priority discrimination circuit makes priority discrimination with the monitor stations 2, 3, and since the monitor station 2 has the priority, the monitor station 2 continues the operation. Next, when the monitor station 1 is restored, the monitor station 1 starts to operate with the priority discrimination circuit of the monitor station 1 and the polling call out carrier A' is transmitted again. As a result, the monitor station 2 during the operation immediately stops and the operation of the monitor station 2 is not restarted through the priority discrimination of the priority circuit of the monitor station 2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8919680A JPS5715548A (en) | 1980-07-02 | 1980-07-02 | Polling monitor system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8919680A JPS5715548A (en) | 1980-07-02 | 1980-07-02 | Polling monitor system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5715548A true JPS5715548A (en) | 1982-01-26 |
Family
ID=13963953
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8919680A Pending JPS5715548A (en) | 1980-07-02 | 1980-07-02 | Polling monitor system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5715548A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5928742A (en) * | 1982-08-09 | 1984-02-15 | Hokuriku Electric Power Co Inc:The | Remote supervisory and controlling equipment |
JPS5940743A (en) * | 1982-08-31 | 1984-03-06 | Yamatake Honeywell Co Ltd | Communication system of process control system |
JPS59172857A (en) * | 1983-03-22 | 1984-09-29 | Fujitsu Ltd | Data collecting system |
JPS60130941A (en) * | 1983-12-20 | 1985-07-12 | Agency Of Ind Science & Technol | Network of computer |
JPH01256843A (en) * | 1988-03-25 | 1989-10-13 | Ncr Corp | Link control system |
-
1980
- 1980-07-02 JP JP8919680A patent/JPS5715548A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5928742A (en) * | 1982-08-09 | 1984-02-15 | Hokuriku Electric Power Co Inc:The | Remote supervisory and controlling equipment |
JPS5940743A (en) * | 1982-08-31 | 1984-03-06 | Yamatake Honeywell Co Ltd | Communication system of process control system |
JPS59172857A (en) * | 1983-03-22 | 1984-09-29 | Fujitsu Ltd | Data collecting system |
JPH039665B2 (en) * | 1983-03-22 | 1991-02-08 | Fujitsu Ltd | |
JPS60130941A (en) * | 1983-12-20 | 1985-07-12 | Agency Of Ind Science & Technol | Network of computer |
JPH01256843A (en) * | 1988-03-25 | 1989-10-13 | Ncr Corp | Link control system |
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