隨著工業以太網發展，實時通信逐步從應用TCP協議轉而采用UDP協議。本文介紹一種基于以太網技術的控制系統，系統應用Modbus/UD 主從通信，同時基于μC/OS-Ⅱ實時操作系統應用優先級技術，從保證了系統的確定性和實時性。本文介紹了系統體系結構、節點軟硬件設計，最后給出了Modbus/UD主從通信情況測試和結論。
[關鍵詞] 控制系統；工業以太網；Modbus/UD協議

Development of Control System Based on Modbus/UDP Xu Honghua1 Liu Ke2 (1 College of Electronics and Information Engineering, University of Science and Technology of Suzhou, Suzhou, 215011) （2 Department of Electronic Informational Engineering ,Suzhou Vocational College, Suzhou 215104） Abstract: With the development of Industrial Ethernet，The UDP protocol is more and more applied in real-time communications. A control system based on UDP protocol is presented in this paper. In the solutions, the Modbus/UDP protocol is integrated into the System and priority is applied which makes sure communication is deterministic. The architecture of the system and the design of the node are introduced in this paper. The test for the system is done in the end and? some elementary conclusion is presented.
Key words: Control system; Industrial Ethernet; Modbus/UDP Protocol