JPS6472697A - Device for automatizing distribution line - Google Patents
Device for automatizing distribution lineInfo
- Publication number
- JPS6472697A JPS6472697A JP62230066A JP23006687A JPS6472697A JP S6472697 A JPS6472697 A JP S6472697A JP 62230066 A JP62230066 A JP 62230066A JP 23006687 A JP23006687 A JP 23006687A JP S6472697 A JPS6472697 A JP S6472697A
- Authority
- JP
- Japan
- Prior art keywords
- supervisory
- return signals
- slave
- transmission
- fault
- 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
Abstract
PURPOSE:To prevent the remote supervisory control of other sound slave stations from troubling due to a fault slave station by providing response time supervisory circuits stopping forcibly the transmission of supervisory return signals when a response time of the supervisory return signals transmitted from the slave stations exceeds a specified value. CONSTITUTION:When the action of a slave station R1 is normal, a transmission time by the slave station terminates in t1. When the supervisory return signals 71 are continuously transmitted due to the fault and the like, a timer 81 in the response time supervisory circuit 41 times out after t2 hours, and a switching circuit 51 is forcibly switched OFF, whereby the transmission of the supervisory return signals 71 are stopped. Consequently, the slave station R1 is detached from a transmission line (l). Thus, the fault is not given to communication between the other sound slave stations R2-Rn and the master station 1. The slave stations R2-Rn are similarly detached from the transmission line (l) When the supervisory return signals continue.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62230066A JPS6472697A (en) | 1987-09-14 | 1987-09-14 | Device for automatizing distribution line |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62230066A JPS6472697A (en) | 1987-09-14 | 1987-09-14 | Device for automatizing distribution line |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6472697A true JPS6472697A (en) | 1989-03-17 |
Family
ID=16902008
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62230066A Pending JPS6472697A (en) | 1987-09-14 | 1987-09-14 | Device for automatizing distribution line |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6472697A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04119740A (en) * | 1990-09-11 | 1992-04-21 | Hitachi Ltd | Remote monitor control method |
JPH04160833A (en) * | 1990-10-24 | 1992-06-04 | Yamatake Honeywell Co Ltd | Channel abnormality noticing method in lan |
US7394824B2 (en) | 2001-12-05 | 2008-07-01 | Mitsubishi Denki Kabushiki Kaisha | System and method of transmitting variable length packet by sequential allocation of permission and monitoring response detection time period |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55154854A (en) * | 1979-05-23 | 1980-12-02 | Hitachi Ltd | Data communication unit |
JPS56103586A (en) * | 1980-01-23 | 1981-08-18 | Hitachi Ltd | Remote monitor control device |
JPS58202693A (en) * | 1982-05-21 | 1983-11-25 | Toshiba Corp | Remote monitor control system |
-
1987
- 1987-09-14 JP JP62230066A patent/JPS6472697A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55154854A (en) * | 1979-05-23 | 1980-12-02 | Hitachi Ltd | Data communication unit |
JPS56103586A (en) * | 1980-01-23 | 1981-08-18 | Hitachi Ltd | Remote monitor control device |
JPS58202693A (en) * | 1982-05-21 | 1983-11-25 | Toshiba Corp | Remote monitor control system |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04119740A (en) * | 1990-09-11 | 1992-04-21 | Hitachi Ltd | Remote monitor control method |
JPH04160833A (en) * | 1990-10-24 | 1992-06-04 | Yamatake Honeywell Co Ltd | Channel abnormality noticing method in lan |
US7394824B2 (en) | 2001-12-05 | 2008-07-01 | Mitsubishi Denki Kabushiki Kaisha | System and method of transmitting variable length packet by sequential allocation of permission and monitoring response detection time period |
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