Data Communication System Design And Realization In Distributed Control System

This paper discuss the design and realization of a data communication system in the DCS project of ice manufacture of ChengDu east railway station , which can transmit the date among the wireless network % control network and Internet .It is made up of two parts - wireless control subsystem and long-distance maintenance subsystem, the function of the wireless control subsystem is to transmit data between wireless network and control network, while the long distance maintenance system make the communication possible between control network and Internet.In this paper, the structure of DCS and the theory of data communication are introduced firstly, then the circuit diagram of hardware and software flow chart are given, and the realization technology of data communication system is described in detail, at last ,the performance of system is well discussed .At end of paper, a complex DCS which can connect different structure networks is referred, it can realize the distributed data collection function and long-distance maintenance function in a automation system which has wide area and lot of working- points.