基于S7-200 SMART PLC实现单按键的启停控制研究

Research on Single Button Start Stop Control Based on S7-200 SMART PLC

单按键启停控制在生产生活中被广泛使用,比如日常的家用电器、工厂设备、农用机械等。本文将介绍S7-200 SMART PLC实现单按键启停的6种经典方法,包括有基本逻辑指令、置位/复位指令、计数器、数学函数指令、交换指令、SR双稳态触发器的使用,对于需控制成本、节约I/O点数时能够给编程人员提供不同的参考方法。同时,也希望能够给初次学习到这门专业技术的学者提供更多的编程思路。

Single button start stop control is widely used in production and daily life,such as daily household appliances,factory equipment,agricultural machinery,etc.This article will introduce six classic methods for S7-200 SMART PLC to achieve single button start stop,including basic logic instructions,set/reset instructions,counters,mathematical function instructions,exchange instructions,and the use of SR bistable triggers.This will provide programmers with different reference methods for controlling costs and saving I/O points.At the same time,we also hope to provide more programming ideas for scholars who are learning this professional technology for the first time.