随着科学技术的发展，PLC在工业控制中的应用越来越广泛。PLC控制系统的可靠性直接影响到工业企业的安全生产和经济运行，系统的抗干扰能力是关系到整个系统可靠运行的关键。自动化系统中所使用的各种类型PLC，有的是集中安装在控制室，有的是安装在生产现场和各种电机设备上，它们大多处在强电电路和强电设备所形成的回收PLC恶劣电磁环境中。%With the development of science and technology, PLC is more and more widely used in industrial control. The reliability of PLC control system directly affects the safety production and economic operation of industrial enterprises and its anti-jamming capability is the key of the reliable operation of the system. Various types of PLC are used in automation system, in which some are centrally installed in the control room, some are installed in production site and a variety of electrical equipment, and most of them are located in the recycling PLC harsh electromagnetic environment formed by strong electrical circuits and high voltage equipment.
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