7、控制梯形图等。本设计介绍应用可编程控制器取代传统的继电器、接触器控制系统,实现自动门控制的过程。关键词:可编程控制器;S7-200;自动门;控制系统1AbstractWiththedevelopmentofscienceandtechnology, greatchangeshavetakenplaceinour life.Anintelligent, automationhasbegantoappearin frontofus, whichprovides greatconvenience forus. A typica
8、lrepresentativeof the automaticdooris intheprocessofautomation, this designistheuseofknowledge, combinedwiththeactual needs of the.Inordertoenhance thereliabil