本文分析了PLC 控制系统中的主要干扰源,并分析了PLC 控制系统工程应用的抗 干扰设计,最后给出了PLC 控制系统应采取的主要抗干扰措施。 关键词:干扰源 PLC 抗干扰 接地 The Anti-interference Problem Research of PLC Control Systems Abstract: The main interference sources and designs of anti-interference in PLC control systems are introduced in this article, and the adopted anti-interference ways are presented mostly at last. Key words: interference source PLC Anti-interference connecting the ground