| Nowadays, with the rapid development of advanced science and technology, such as computer, communication and micro-electronics, the world has been in the era of information. Because of these high technologies, a great change in control domain has been taken place. This is the development of fieldbus technology. Because of its characteristics of flexibility, high performance and tough credibility, the fieldbus, which brought the fundamental transformation to the structure of industrial automation, is the trend of control system.As there are numerous standards of fieldbus technology in the world, a toughtask run into us Chinese-how to form our own fieldbus standard? So a NationalIPR Fieldbus-SBUS is designed according to advanced fiedlbus technology inthis thesis. SBUS is a redundant, bi-directional, digital data communication protocol used for communications among field instrumentation and control systems which suits the situation of our country.The overview of SBUS is introduced followed by the analysis and design of detail technology in physical layer, data link layer and application layer. The reason and objective of using the technique are presented in chapter 3, chapter 4 and chapter 5. Then, a new control system based on SBUS is proposed, which employs the merits of fieldbus and saves the earlier investment of users by integrating digital and analog signals in the one system. A demo system is configured to validate our design. The advantage of SBUS is concluded. At last, the future of SBUS and the control system based on it is forecasted.
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