1762-L40BWAR

1762-L40BWAR

1762-L40BWAR

1762-L40BWAR

PLC由于具有功能强、程序设计简介，维护方便等优点，特别是高可靠性、较强的适应恶劣工业环境的能力，已被广泛应用于自来水行业。但由于现场环境条件恶劣、湿度高、以及各种工业电磁、辐***扰等，会影响系统的正常工作,因此必须重视工程的抗干扰设计。 
水厂应用中的PLC所受的干扰源主要有电源系统引入的干扰、接地系统引入的干扰和输入输出电路引入的干扰三类。如果PLC的干扰问题解决得不好，系统将无法可靠运行，将会影响到正常供水。因此，有必要对PLC应用系统中的干扰问题进行探讨。主要本文分别讨论PLC的三种抗干扰技术。

2 抗干扰的技术对策分析

为防止干扰，可采用硬件和软件的抗干扰措施，其中，硬件抗干扰是***基本和***重要的抗干扰措施，一般从抗和防两方面入手来***和消除干扰源，切断干扰对系统的耦合通道，降低系统对干扰信号的敏***。

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