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This topic is a Chinese 948 Project \control , sensing and acquisition systems , electrical systems , control and interface systems , software system design and development . This paper first analyzes the tea rolled principle, suitable for automatic control of the rolling process , and to develop the overall design of the automatic control . PLC control , the overall program mainly divided into control speed control , pressure control , and the upper and lower leaf three subsystems . By computational analysis with respect to their hardware selection and connection . Second , the application of the Delphi software on the host computer software development, and the establishment of a database . The lower machine PLC software development the Siemens company specializes SIMTIC S7-200 series PLC design and development STEP7-Micro/WIN32 software . Its application by the main program , the interrupt service routine and function module subroutine . Finally, the entire automatic control system , communications processing , developed the Modbus communication protocol . The subject R \u0026 D and manufacturing equipment , has been delivered by the end of July 2008 . We assist the Tea Research Institute of Chinese Academy of Agricultural Sciences, tea test done twice autumn , six groups of data collected . The analysis results show that the R \u0026 D initially achieve the desired results . This topic is the beginning of a series of tea automatic control , groundbreaking work , has a very important significance .
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