PLC在包装计量秤中的应用

The Application of PLC in the Package Weight Scale

本文分析了PLC的结构及组成,工作原理,工作过程,设计选型原则以及编程步骤和思想,以及西门子PLCS7-200的一些常用指令。重点讨论了包装计量秤的工艺流程及控制要求,PLC的输入输出点,以及PLC在包装计量秤中的应用。实践证明,PLC完全可以实现包装计量秤的自动控制。

This article analyses the mechanics and composes, the principle, the working course, the designing and lectotype principle, the procedure and idealogy in programming of PLC, and some instructions in common use in the PLC S7-200 of Siemens. The article debates emphasisly the process flowing of package balance and requires in controling, the inputing points and the outputing points of PLC, and the application of PLC in the package weight scale. Practicing proves that PLC can achieve the automatic controlling of package weight scale absolutely.