Research And Design Of The Ore-terminal Central Control System Based On Industrial Ethernet

With the development of automation science, computer science, communication and network technology, the scope of information interchange has already covered the factory, the enterprise and even the world market, therefore, it is necessary to establish a integrated and automated network foundation including all the layers from the industrial locale equipment layer to the control layer and the management layer, and constitute an enterprise informational system based on industrial control network technology.The Ethernet has all the required character of industrial control network, along with the unceasing development and consummation of Ethernet technology, the COTS technology represented by Ethernet is widely used in industrial domain. During 90 ages of 20 century, many big industrial company inside and outside adopted the Ethernet in their system one after another, produced DCS, PLC, date collection implement based on Ethernet, in addition to some locale meter and display meter also based on Ethernet. For the future, Ethernet must have become the first choice of the industrial control network, and must have displaced the Fieldbus which now has too much standards to enter into the control layer of automation system, so the hope of "one network for system" would come true.This paper is based on ZhanJiang harbor central control system, starting off from the development process of industrial control network, analyzing the history, actuality and trend of the Ethernet. It also gives discussion and research in the key technology of the Ethernet when using in industrial locale, mainly analyzing the unresolved problem such as real time character and uncertain character. In addition, the paper narrate how the Ethernet is used in industrial control and how the Ethernet is integrated with informational network. The author presided over the configuration and communication of the hardware in the project, also programmed at the PLC, so the paper accordingly gives the way and means of the strap control program.