PLC实验梯形图和试验报告，学习PLC同学可作参考-PLC ladder diagram and the experimental test report, students can study for reference PLC

这个程序是基于PLC，实现滑块定位的一个程序，在step7下可以运行。-This program is based on the PLC to achieve the the slider positioning of a program, in the the step7 can run.