1、 ? PAGE 1 装卸料小车多方式运行的 PLC 控制系统设计 【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，可实现运料小车的自动化控制，降 低系统的运行费用。通
2、信和数据连接功能选项使得 PLC 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 运料小车 控制系统 I/O 点 ? PAGE 2 AbstractAbstract： Early electric car control system of the transporter over
3、 the relay - contactor complex system composed of The system design cycle,there is a long,bulky,high cost,defects,no data processing and communications functions,must be hand operated,will be applied to transport materials car PLC electrical control system and can realize automatic control operation
4、 of the car,reducing the running costs of the system,PLC control system for electric car transporter with a simple connection to control speed,reliability and maintainability is good,easy to install,repair and improvement and so on.With economic development,transport materials to various areas of gr
5、owing car,from manual to automatic,and gradually formed the mechanization and automation. PLC applied to transport materials to car electrical control system and can realize automatic control operation of the car and reduce system operating costs.Communications and data connectivity options make PLC
6、 in volume,communications and special function modules such important applications perfectly. The topics include:analysis of plant and a clear system control requirements;PLC selection;determine the systems I / O device number and type;control process design;control programming. PLC control system in the car transporter in the application,has been in domestic and international projects has been applied in the factory,with huge economic and social value,the intelligence and automation be
