基于PLC的四级传送带控制的设计(成品)1(3)

1设计目的及意义 ............................................................................. 1

1.1设计背景 ........................................................................................ 1 1.2可编程逻辑控制器简介 ................................................................ 1

2 四级传送带硬件设计 .................................................................... 2

2.1 控制对象及要求 ........................................................................... 2 2.2 硬件选型 ....................................................................................... 3 2.3 系统I/O分配 ................................................................................ 4

3 四级传送带软件设计 .................................................................... 5

3.1总体梯形图 .................................................................................... 5 3.2程序语句表 .................................................................................. 10 3.3 程序调试及结果分析 ................................................................. 12

4 心得体会 ...................................................................................... 14 参 考 文 献 .................................................................................... 15