论文编号:JX434 论文书字数:22348.页数:35 摘要 本次毕业设计为PLC的原理与应用。设计中,首先对PLC的定义做了阐述,然后回顾了它的历史,讲解了它的市场状况,并对其发展趋势做了展望,接着对PLC的工作原理和分类做了详细的描述。后面讲解了PLC的编程,并列举了一些常用的电路,举例说明了它在数控系统中的应用,{zh1}对其故障诊断做了简述。 关键词:PLC、编程、梯形图、数控系统、维护 Abstract The graduation of the PLC design principles and applications. Design, the first definition of the PLC done so, then recalled its history, on its market situation, and its development trend of prospects, and then the PLC principle and gave a detailed classification of the description. On the back of the PLC program, and cited a number of commonly used circuit, examples of engineering practice in the application of its fault diagnosis was made briefly. Keywords:PLC 、Programming 、Ladder、NCS 、Maintenance