1、 编号 毕业设计(论文) 院 ( 系 ) 名 称 专业名称 学生姓名 学号 指导教师 2012 年 6 月 15 日 I 摘 要 早期运料小车电气控制系统多为继电器接触器组成的复杂系统,这种系统 存在设计周期长、体积大、成本高等缺陷,无数据处理和通信功能,必须有专人 负责操作,将 PLC 应用到运料小车电气控制系统,可实现运料小车的自动化控制, 降低系统的运行费用,PLC 运料小车电气控制系统具有连线简单,控制速度快,可 靠性和可维护性好,易于安装、维修和改造等优点。随着经济的发展,运料小车 不断扩大到各个领域,从手动到自动,逐渐形成了机械化、自动化。 将 PLC 应用到运料小车电气控制系统,
2、可实现运料小车的自动化控制,降低 系统的运行费用。它功能强大,可扩展到多达 128I/O 点,且能增加特殊功能模块 或扩展板。通信和数据连接功能选项使得 FX1N 在体积、通信和特殊功能模块等重 要的应用方面非常完美。本课题主要包括:分析被控对象和明确系统控制要求; PLC 选型;确定系统的 I/O 设备的数量及种类;控制流程设计;控制程序设计。 PLC 在运料小车控制系统中的应用, 已经在国内外工程、 工厂中得到实际应用, 具有巨大的经济和社会价值,其智能化和自动化的思路值得以后继续深入研究和 推广。 关键词:PLC 控制系统;运料车;逻辑控制电路;变频器 II Abstract Early
3、 haul car electrical control system is mostly composed of a complex system of relay - contactor, this system design cycle length, volume, cost and defects, data processing and communications functions, there must be someone responsible for operating the PLC applicationelectrical control system to ha
4、ul the car, the automatic control of material transport trolley, reducing the running costs of the system the PLC haul car electrical control system has a simple connection, control speed, reliability and maintainability, easy to install,maintenance and transformation. With economic development, the
5、 material transport trolley expanding to various fields, from manual to automatic, and gradually formed the mechanization and automation. PLC applications to haul the car electrical control system, can haul car automation and control, reducing the running costs of the system. It is powerful, and can
6、 be expanded to up to 128I / O points, and can increase the special function module or an expansion board. Communications and data connectivity options makes perfect FX1N important applications in the volume, communication, and special function modules. The main topic: the analysis of the controlled object and a clear system control requirements; the PLC selection; determine the systems I / O device number and types; process design; control program design. PLC in the transported materi