PLC 梯形图程序分析方法研究

摘要

This paper elaborated the characteristics of the LAD program from the PLC operating mode and the relationship between LAD and electrical diagram ,expounded the errors in analyzing LAD program ,and summarized the method of analyzing LAD program by painting working waveform .%从PLC的运行方式和梯形图与电气图的关系两方面阐述了梯形图程序的特点，论述了分析梯形图程序时容易出现的误区，总结了通过画工作波形图来分析梯形图程序的方法。