KR980007259A

KR980007259A - Multi communication method

Info

Publication number: KR980007259A
Application number: KR1019960021018A
Authority: KR
Inventors: 강재현
Original assignee: 이종수; 엘지산전 주식회사
Priority date: 1996-06-12
Filing date: 1996-06-12
Publication date: 1998-03-30
Also published as: KR100277456B1

Abstract

본 발명은 컴퓨터와 그에 연결된 통신체간의 다중 통신방법에 관한 것으로, 특히 별도의 통신 모듈을 사용하지 않고도 원거리 다중통신이 가능하도록 한 다중 통신방법에 관한 것으로, RS-422통신방식으로 통신체와 통신을 행하고자 하는 경우에 프레임의 국번이 RS-232C를 통한 근거리의 통신체와 국번이 일치하면 RS-232C 방식을 사용한 근거리의 통신을 행하며, 국번이 일치하지 않으면 RS-422방식을 통한 원거리 통신의 경우라고 판단하여 RS-422통신선로를 통해 원거리 통신을 행하도록 함으로써 별다른 통신모듈을 사용하지 않고도 근거리 및 원거리 통신을 행할 수 있어 사용의 편리성과 저가의 통신을 수행할 수 있는 효과가 있게 된다.The present invention relates to a multi-communication method between a computer and a communication body connected thereto, and more particularly, to a multi-communication method capable of remote multi-communication without using a separate communication module. If the station number of the frame coincides with the near field communication station through RS-232C, the near field communication is performed using the RS-232C method. If the station numbers do not match, it is determined as the case of long distance communication through the RS-422 method. By making the long-distance communication through the RS-422 communication line, it is possible to perform short-range and long-distance communication without using a separate communication module, so that it is convenient to use and low-cost communication.

Description

Multi communication method

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제2도는 본 발명 RS-422방식에 의한 다중통신장치를 나타낸 블럭도.2 is a block diagram showing a multi-communication apparatus according to the present invention RS-422 method.

제3도는 본 발명 RS-422방식에 의한 다중통신방법을 나타낸 흐름도.3 is a flowchart illustrating a multiple communication method using the present invention RS-422 method.

제4도는 본 발명에 의거하여 컴퓨터로부터 RS-422 방식으로 연결된 국의 동작을 나타낸 흐름도.4 is a flowchart showing the operation of a station connected in a RS-422 manner from a computer according to the present invention.

Claims

The communication body receives the frame from the computer through RS-232C communication method and then executes the first step of judging whether its station number and its station number match, and if it is determined to match its station number by the first process, If the second process responds through the RS-232C communication line, and the first process does not match its own station number, it is determined that the remote communication is performed through the RS-422 method. A multi-communication method comprising a third process of transmitting to the 422 communication line.

The method of claim 1, wherein the communication unit determines whether the station number and its own station number coincide with each other when the frame is input through the RS-422 communication line, and when it is determined that the communication unit matches the station number by the fourth process. After performing the command, and responding through the RS-232C communication line, and if it is determined that it does not match the station number by the fifth process, and delivers the frame input from the computer to other communication entities through the RS-422 method And a sixth step of responding through the RS-232C line if there is a response from another communication entity.

The multiple communication method of claim 2, wherein the other communication entity of step 6 responds only when the station number of the frame coincides with its own station number.