目录1无极绳绞车运输的特点及其工作原理...........................................31.1无极绳绞车的用途及特点.................................................31.1.1用途..............................................................31.1.2特点..............................................................31.2无极生绞车的工作原理...................................................41.2.2列车编组形式......................................................51.2.3使用环境条件与环境影响............................................51.2.4工作条件..........................................................51.2.5安全..............................................................61.3选题背景...............................................................61.4课题研究的主要内容.....................................................62无极绳绞车及控制系统的组成................................................72.1无极绳绞车的主要设备...................................................72.1.1绞车.............................................................72.1.2张紧装置..........................................................72.1.3梭车.............................................................82.1.4尾轮.............................................................82.1.5轮组.............................................................82.2无极生绞车的运行方式...................................................92.2.1使用前的准备和检查................................................92.2.2使用时的安全注意事项.............................................102.2.3启动及运行过程中的操作程序及注意事项.............................112.2.4运行中的监测和记录...............................................112.2.5停车的操作程序、方法及注意事项...................................112.3无极生绞车控制的关键技术及难点........................................113无级绳绞车控制系统的硬件设计..............................................123.1现场总线技术..........................................................123.1.1现场总线的特点...................................................133.1.2现场总线技术发展趋势.............................................143.2PROFIBUS（过程现场总线）.............................................153.2.1PROFIBUS的组成..................................................1513.2.2PROFIBUS的传输技术..............................................163.2.3PROFIBUS总线存取方式............................................163.2.4PROFIBUS-DP设备的分类...........................................163.2.5PROFIBUS-DP网络配置方案.........................................163.3PLC系统................................................................173.3.1PLC系统.........................................................173.4无极绳绞车控制系统设计与选型............................................183.5S7-300系列PLC简介.....................................................183.5.1S7-300的概况....................................................183.5.2S7-300的组成部件................................................183.6无级绳绞车控制系统的通信网络配置........................................193.7修磨机PLC控制系统的硬件配置............................................203.8无极生绞车的变频传动系统................................................223.8.1变频器的工作原理.................................................223.8.2变频器电路的基本功能.........