张君霞 张勇 郑州铁路职业技术学院(450052) 摘要:介绍了可编程控制器PLC学习及使用过程中的若干难点问题,并通过梯形图程序实例,针对这些难点问题进行分析,给出了相应的解决方法。 关键字:PLC,梯形图,应用 Abstract: The paper discusses some difficulties in the study and application of PLC. Ladder diagram program is took as example, in which some difficulties in PLC application are analyzed, and corresponding solution methods are drew. Keywords:PLC, Ladder diagram, ladder diagram |