JPS5671352A - Multidrop data communication system - Google Patents
Multidrop data communication systemInfo
- Publication number
- JPS5671352A JPS5671352A JP14731479A JP14731479A JPS5671352A JP S5671352 A JPS5671352 A JP S5671352A JP 14731479 A JP14731479 A JP 14731479A JP 14731479 A JP14731479 A JP 14731479A JP S5671352 A JPS5671352 A JP S5671352A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- slave stations
- output
- sequence
- communication system
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/403—Bus networks with centralised control, e.g. polling
Landscapes
- Small-Scale Networks (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
PURPOSE:To reduce the amount of communication transmission, by transmitting the selected sequence in a specific timing for time sharing of each slave station when the transfer of the character sequence is absent, in the multidrop data communication system of contention system. CONSTITUTION:A plurality of slave stations 111, 112 are in branch connection to a control station 14 with transmission line 12 and reception line 13. Further, if the transfer of character sequence is interrupted for a given time or more on the reception line 13, a time sharing timing circuit 19 transmits the output of ''1'' in a given timing to one input terminal of an AND circuit 23 based on the output of an off-delay timer 17 in the slave stations 111, 112. On the other hand, the output of ''1'' is input to another input terminal of the circuit 23 of an AND circuit of the slave stations 111, 112, based on the data transfer request. Accordingly, the selective sequence is transmitted from a selective sequence generator 20 of the slave stations. Thus, the amount of communication transmission can be reduced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54147314A JPS6014547B2 (en) | 1979-11-14 | 1979-11-14 | Multi-drop data communication method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54147314A JPS6014547B2 (en) | 1979-11-14 | 1979-11-14 | Multi-drop data communication method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5671352A true JPS5671352A (en) | 1981-06-13 |
JPS6014547B2 JPS6014547B2 (en) | 1985-04-13 |
Family
ID=15427383
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54147314A Expired JPS6014547B2 (en) | 1979-11-14 | 1979-11-14 | Multi-drop data communication method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6014547B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63121931U (en) * | 1987-02-02 | 1988-08-08 | ||
JPH01174022A (en) * | 1987-12-28 | 1989-07-10 | Matsushita Electric Ind Co Ltd | Fm receiver |
-
1979
- 1979-11-14 JP JP54147314A patent/JPS6014547B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS6014547B2 (en) | 1985-04-13 |
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