| PLC for its stability, reliability in the industrial application of a wide range of fields, at the same time through the field bus technology workshop will be intelligent plant equipment monitoring network, access to corporate local area network or the network group. Therefore, I feed factory for the production of feed ingredients and accuracy, stability, human interface, as well as production safety requirements of the control system used in the computer industry + PLC distribution bus in a controlled manner designed to achieve a Siemens PLC ( S7-300) of the ingredients in redundant systems,using SQLServer (relational database) as the background database, design a new system of statements.Through the use of on-site test results and analysis of the control system to improve the system of anti-interference ability and accuracy of ingredients. At the same time, human-friendly interface, intuitive, the system can query statements ingredients history, monitoring the course of ingredients, tracking product quality. From the use and maintenance costs, the independent system design, software development costs low, has a good replacement of equipment. |