Research On The Control System Of Oil Extraction Joint Station Based On PLC

At the beginning of last century's informational construction, various departments and basic levels were the development units of information system for low level of network, while the problem had been taken into no or little consideration that resource sharing and communication consists in other systems, enterprise, departments and the system developed. The result that different information data islands were united by different informational systems not only makes exploiting system repeatedly, but also interferes using data in modern large firms fully and scientifically.The problem above also exists in the process of informational construction of oil business in China. For the sake of solving it, the paper have done a lot of research and found three main reasons. Firstly, there is no united standard of data in'name, type and value'. Secondly, information is not classified suitably. Thirdly, the data model is always designed on the basis of application (outer model), ignoring natural relationship among information. Furthermore, the paper suggest some solutions: first, fabricating comprehensive frame model systems of data elements; second, classifying and defining object of various major business scientifically; third, designing data element registered model and registered process. In the end, the paper completes total registered system and develops'the dictionary registered system of oil data element in China', which bases B/S pattern.