基于plc的液位控制毕业论文

Computer technology has and will continue to change the world, to computer technology-based programmable logic controller (PLC) is also changing the face of factory automation. With development of the times, in the 21st century a new field of industrial control, PLC automation technology has become the core application technology related industries, for a variety of automated equipment provides a very reliable control applications, in various fields to adapt to different customer requirements . This paper is designed based on S7-300 and configuration software WINCC dual tank water level cascade control system. Use WINCC good user interface, data acquisition capabilities, combined with the convenience of STEP 7 programming environment and software PID control function blocks to implement control algorithms and programming and hardware configuration, and then using the MPI interface THSA1 reliable experimental device establish WINCC and S7-300, two-capacity data communication between the tank and ultimately achieve precise control of water level. The practical result shows that this method is simple and reliable to use, can be widely used in industrial production process level control problem. 用谷歌翻译的。

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