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 specific methods using PLC and WinCC to achieve air monitoring and control. This system