KR970009059A - Communication port protection circuit of multi-drop communication system - Google Patents
Communication port protection circuit of multi-drop communication system Download PDFInfo
- Publication number
- KR970009059A KR970009059A KR1019950019807A KR19950019807A KR970009059A KR 970009059 A KR970009059 A KR 970009059A KR 1019950019807 A KR1019950019807 A KR 1019950019807A KR 19950019807 A KR19950019807 A KR 19950019807A KR 970009059 A KR970009059 A KR 970009059A
- Authority
- KR
- South Korea
- Prior art keywords
- communication
- communication interface
- interface means
- line
- protection circuit
- Prior art date
Links
Abstract
1. 청구범위에 기재된 발명이 속한 기술분야1. TECHNICAL FIELD OF THE INVENTION
멀티-드롭방식을 채용한 통신시스템에 관한 것이다.A communication system employing a multi-drop method.
2. 발명이 해결하고자 하는 기술적 과제2. Technical problem to be solved by the invention
멀티-드롭에 연결된 각 통신단말들중 일부의 고장으로 인해 통신시스템 전체가 오동작하거나 통신 불능상태가 되는 것을 방지한다.The failure of some of the communication terminals connected to the multi-drop prevents the whole communication system from malfunctioning or becoming inoperative.
3. 발명의 해결방법의 요지3. Summary of Solution to Invention
멀티-드롭 통신선로와 해당 통신단말 사이에 송수신되는 신호를 인터페이스하기 위한 통신 인터페이스수단과 통신선로간의 연결라인을 단속하기 위한 스위칭수단을 구비하여 통신 인터페이스수단을 통해 데이타를 송신한 후 일정시간이 경과할때까지 응답이 없을 경우 스위칭수단을 제어하여 연결라인을 절단한다. 또한 연결라인을 절단한 후 통신 인터페이스수단의 송신단자에 임의의 데이타를 송신한 다음에 통신 인터페이스수단의 수신단자의 데이타를 확인하여 상이하거나 수신되지 않을 경우 절단상태를 계속 유지한다.A communication interface means for interfacing the signals transmitted and received between the multi-drop communication line and the corresponding communication terminal and a switching means for controlling the connection line between the communication lines are provided, and a predetermined time elapses after transmitting data through the communication interface means. If there is no response until then, cut off the connection line by controlling the switching means. Also, after cutting the connection line, any data is transmitted to the transmitting terminal of the communication interface means, and then the data of the receiving terminal of the communication interface means is checked to maintain the cutting state if it is different or not received.
4. 발명의 중요한 용도4. Important uses of the invention
RS-485방식 통신시스템RS-485 communication system
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제2도는 본 발명에 따른 통신포트 보호회로도.2 is a communication port protection circuit diagram according to the present invention.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950019807A KR970009059A (en) | 1995-07-06 | 1995-07-06 | Communication port protection circuit of multi-drop communication system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950019807A KR970009059A (en) | 1995-07-06 | 1995-07-06 | Communication port protection circuit of multi-drop communication system |
Publications (1)
Publication Number | Publication Date |
---|---|
KR970009059A true KR970009059A (en) | 1997-02-24 |
Family
ID=66526768
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019950019807A KR970009059A (en) | 1995-07-06 | 1995-07-06 | Communication port protection circuit of multi-drop communication system |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR970009059A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101224523B1 (en) * | 2011-06-13 | 2013-01-22 | 주식회사 코맥스 | Sensing circuit for mailfunction of data line of multi-drop communication circuit |
-
1995
- 1995-07-06 KR KR1019950019807A patent/KR970009059A/en not_active Application Discontinuation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101224523B1 (en) * | 2011-06-13 | 2013-01-22 | 주식회사 코맥스 | Sensing circuit for mailfunction of data line of multi-drop communication circuit |
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WITN | Withdrawal due to no request for examination |