PLC的小车定位系统设计_-

基于 PLC 的小车定位系统设计摘要企业现代化生产规模的不断扩大和深化，使得仓库成为生产物流系统中的一个重要且不可缺少的环节。立体仓库正以它最小的占地面积和最佳的空间利用率，逐步替代面积利用率极低且陈旧落后的平面仓库，这种替代促使仓储物流业的水平提高。为满足现代化生产与流通的需要，就必须采用以计算机控制技术为主要手段组成的自动化立体仓库。本设计通过对小车自动控制过程的分析，明确了小车自动控制过程中实现控制过程的工艺要求。设计中以小车为控制对象，采用德国西门子公司的 S7-300 系列可编程序控制器实现了对小车的定位自动控制。本文首先阐述了 PLC 工作原理与 STEP7 编程语言，并对小车在仓库中的工作过程作以介绍，然后详细描述小车定位自动控制系统的设计过程，包括小车工作时的 PLC程序设计，并附有 PLC 程序梯形图。关键词：S7-300 PLC ，小车定位，自动化立体仓库 辽宁科技大学毕业设计（论文） 第 I 页Trolleys Positioning Automatic Control System DesignAbstractModernized production scale enterprises have constantly expanded and deepened, allowing warehouses to become an important production and logistics system indispensable link. It is three-dimensional warehouse to the smallest area and the best utilization of space, space utilization is very low and gradually replace the outdated one-dimensional warehouse, a storage alternative to the logistics industry standards. To meet the needs of modern production and circulation, we must use a computer control technology as a primary means of automated three-dimensional warehouse. This text introduced the small car in brief in the work in the warehouse process, the PLC weaves with STEP7 the distance language, detailed described the PLC procedure design for small car to work, and fish-eye PLC procedure trapezoid diagram.Trolleys automatic control of the design process through the analysis clearly trolleys automate the process of achieving control of processes. Trolleys for the control design to the target, the use of German Siemens company S7-300 series programmable controller to achieve trolleys positioning automatic control.The first expounded on trolleys in the warehouse process and PLC operating principles to do with STEP7 programming language introduced, and then described in detail trolleys positioning automatic control system design process, including the work of trolleys PLC programming, together with PLC procedures Tixingtu.Key words: S7-300 PLC，Trolleys positioning，Automated three-dimensional warehouseII目 录摘要 .............................................................................................................................................IABSTRACT...............................................................................................................................II目 录 .........................................................................................................................................III1 绪论..........................................................................................................................................11.1 选题背景及目的...............................................................................................................11.2 国内外的研究状况...........................................................................................................11.3 课题的研究方法和内容...................................................................................................32 PLC 编程软件 STEP7 ..............................................................................................................42.1 SIEMENS 公司编程软件 STEP7 的简单介绍 ...............................................................42.2 使用 STEP7 软件开发一个 PLC 程序的步骤 ...............................................................42.3 SIEMENS 公司的 S7-300 系列可编程控制器介绍 .......................................................83 控制系统总体方案设计以及系统流程图............................................................................113.1 控制系统总体方案........................................................................................................113.2 小车定位控制工艺流程图.............................................................................................144 小车定位控制 PLC 程序编制 ..............................................................................................154.1 PLC 选型和资源配置 ....................................................................................................154.2 PLC 程序设计 ................................................................................................................18结论...........................................................................................................................................25致谢...........................................................................................................................................26参考文献...................................................................................................................................27附录 A（外文文献) .................................................................................................................28附录 B（中文译文） ...............................................................................................................3501 绪论1.1 选题背景及目的自动化立体仓库的出现是物流技术的一个划时代的革新。它不仅彻底改变了仓储行业劳动密集、效率低下的落后面貌，而且大大拓展了仓库功能，使之从单纯的保管型向综合的流通型方向发展。自动化立体仓库是用高层货架储存货物，以巷道堆垛起重机存取货物，并通过周围的装卸搬运设备，自动进行出入库存取作业的仓库。　　自动化立体仓库具有普通仓库无可比拟的优越性。首先是节约空间、节约劳力。据国际仓库自动化会议资料：以库存 11000 托盘、月吞吐 10000 托盘的冷库为例，自动