摘  要：介绍了一种基于PLC和WinCC的空气自动控制系统方案，通过介绍系统软硬件的组成和特点，论述了PLC和WinCC实现空气监测和控制的具体方法。系统以S7-300PLC为控制器，用WinCC输入各种参数以及显示系统状态,具有抗干扰能力强和人机交互性好等特点。关键词：PLC  S7-300  WinCC  变频器 Abstract: This paper introduces an automatic air control system based on PLC and WinCC. Through presenting the composition and characteristics of the system hardware and software, this paper discusses the speci[登陆后可查看全文]