I目录一、绪论..........................................................................................................................................11.1.选题意义...........................................................................................................................11.2.运料小车发展历史及现状...............................................................................................11.3.课题的意义及应用...........................................................................................................2二、PLC应用....................................................................................................................................42.1PLC的定义、硬件结构、工作原理以及系统设计........................................................42.1.1PLC的定义............................................................................................................42.1.2PLC的硬件结构....................................................................................................42.1.3PLC的工作原理....................................................................................................52.1.4PLC的系统设计......................................................................................................62.2系统的资源分配................................................................................................................82.2.1系统的I/O资源分配............................................................................................82.3系统PLC的具体设计........................................................................................................92.3.1系统顺序流程图..................................................................................................102.3.2系统梯形图..........................................................................................................102.3.3系统的语句表（STL）........................................................................................12三、运料小车的硬件设计.............................................................................................................163.1小车运行示意图..............................................................................................................163.2系统工作原理分析及要求..............................................................................................163.3小车运行分析..................................................................................................................163.4运料小车硬件介绍..........................................................................................................18四、工作总结................................................................................................................................204.1设计总结..........................................................................................................................204.1．1小车的优缺点分析............................................................................................204.1.2设计的改进及推广..............................................................................................20参考文献........................................................................................................................................231基于PLC的自动运料小车设计摘要PLC（Program...
