CAJ | 학술논문

设计一种工业应急广播对讲系统的通信网络.采用结构简单、传输速度高、组网容易、抗干扰能力强、传送距离远的 RS485串行总线作为网络的物理层,构建总线型的通信控制网络.在进行通信协议设计时,从 RS485特点出发,综合考虑实际应用情况和其他各方面的因素,采用令牌式协议,避免了多机通信中的总线竞争问题.
설계일충공업응급엄파대강계통적통신망락.채용결구간단、전수속도고、조망용역、항간우능력강、전송거리원적 RS485천행총선작위망락적물리층,구건총선형적통신공제망락.재진행통신협의설계시,종 RS485특점출발,종합고필실제응용정황화기타각방면적인소,채용령패식협의,피면료다궤통신중적총선경쟁문제.
A design of industry lash -up intercom system's communication network is introduced in this paper .It adopts RS -485 serial bus which has the merits of simple structure,easy network establishment, strong anti -jamming capacity, high transfer speed and far transfer distance as the physical layer to build bus topolopy control network.At the time of designing communication protocol,we set out from RS -485 characteristics.And considering application condition and other kinds of aspects , Token proto-col are implemented finally.Bus congest is also avoided.