常见PLC故障诊断与维修实例

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摘要:PLC控制系统的硬件由电源模块、I/O 模块、现场输入输出元件,以及一些导线、接线端子和接线盒组成。长期运行的PLC由于环境恶劣、接地不良或者维护不彻底等原因会造成损坏。文章对常见PLC经常出现的故障做简单分析介绍,希望对出现的故障能够快速处理,在提高维修水平的同时提高生产效率。

关键词:PLC;诊断;实例;维修;程序

doi:10.3969/J.ISSN.1672-7274.2022.01.017

中图分类号:TP 3                      文献标示码:A                    文章编码:1672-7274(2021)01-052-03

Common PLC Fault Diagnosis and Maintenance Examples

LIU Feng, LI Zixi, GAO Haitao, ZHOU Wen, GAO Xianwu

(Shandong Pacific optical fiber and cable Co., Ltd., Liaocheng 252300, China)

Abstract: The hardware of PLC control system consists of power module, I / O module, field input and output components, as well as some wires, terminals and junction boxes. PLC in long-term operation will be damaged due to poor environment, poor grounding, incomplete maintenance and other reasons. The following is a brief analysis and introduction of common PLC faults, hoping to quickly deal with the faults and improve the production efficiency while improving the maintenance level.

Key words: PLC; diagnosis; examples; maintenance; program

1   研究背景

随着PLC普及和推广,其应用领域越来越广泛,与传统的继电器-交流接触器控制系统相比,PLC控制系统具有更好的稳定性,特别是在新建项目和设备改造中,常常采用PLC作为控制装置,实现被控对象的工艺要求,提高生产效率和产品质量。(剩余2473字)

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