JPS6444151A - Communication control system - Google Patents
Communication control systemInfo
- Publication number
- JPS6444151A JPS6444151A JP62201224A JP20122487A JPS6444151A JP S6444151 A JPS6444151 A JP S6444151A JP 62201224 A JP62201224 A JP 62201224A JP 20122487 A JP20122487 A JP 20122487A JP S6444151 A JPS6444151 A JP S6444151A
- Authority
- JP
- Japan
- Prior art keywords
- communication controller
- monopolization
- communication
- request signal
- controller
- 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 disabled communication of other communication controller due to a fault of a communication controller by providing a means allowing other communication controller to release monopolization when a communication controller monopolies one communication line. CONSTITUTION:Let suppose that a communication controller 21 requests the monopolization of a communication line 1 and communicates a communication controller 22, the the communication controller 22 monitors the interval of a sent message and when the interval of message is larger than a prescribed time T or over, a monopoly acknowledge signal 6 is sent to the communication controller 21. When the monopolization still continues, the communication controller 21 returns a monopolization request signal 7 to the communication controller 22. On the other hand, when the communication controller 21 does not return the monopolization request signal 7 due to a fault or the like, the communication controller 22 release the monopolization of the communication controller 21 on the condition of unreceived monopolization request signal 7.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62201224A JPS6444151A (en) | 1987-08-12 | 1987-08-12 | Communication control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62201224A JPS6444151A (en) | 1987-08-12 | 1987-08-12 | Communication control system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6444151A true JPS6444151A (en) | 1989-02-16 |
Family
ID=16437393
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62201224A Pending JPS6444151A (en) | 1987-08-12 | 1987-08-12 | Communication control system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6444151A (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5431873A (en) * | 1977-08-17 | 1979-03-08 | Hitachi Ltd | Multiple controller |
JPS593642U (en) * | 1982-06-29 | 1984-01-11 | ラツクス株式会社 | Voltage supply circuit in frequency synthesizer receiver |
JPS6215951A (en) * | 1985-07-15 | 1987-01-24 | Canon Inc | Network system |
JPS62136144A (en) * | 1985-12-10 | 1987-06-19 | Matsushita Electric Ind Co Ltd | Home bus line acquisition and supervising system |
-
1987
- 1987-08-12 JP JP62201224A patent/JPS6444151A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5431873A (en) * | 1977-08-17 | 1979-03-08 | Hitachi Ltd | Multiple controller |
JPS593642U (en) * | 1982-06-29 | 1984-01-11 | ラツクス株式会社 | Voltage supply circuit in frequency synthesizer receiver |
JPS6215951A (en) * | 1985-07-15 | 1987-01-24 | Canon Inc | Network system |
JPS62136144A (en) * | 1985-12-10 | 1987-06-19 | Matsushita Electric Ind Co Ltd | Home bus line acquisition and supervising system |
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