AO820 3BSE008546R1 ABB

The interference sources of PLC in the application of water plants mainly include the interference introduced by the power supply system,the interference introduced by the grounding system and the interference introduced by the input and output circuits.If the interference problem of PLC is not solved well,the system will not be able to operate reliably,which will affect the normal water supply.Therefore,it is necessary to discuss the interference problem in PLC application system.This paper discusses three anti-interference technologies of PLC respectively.

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。本文分别讨论PLC的三种抗干扰技术。