基于PLC的砂石加工控制系统设计.doc

昆 明 理 工 大 学 毕 业 设 计（论文） 题 目 基于PLC的砂石控制系统设计2013年 6 月 3 日 Kunming University of Science and Technology （Thesis） Papers topic：Sand and gravel processing control system design based on PLC ： ： Student name： Hujinquan Guiding teachers name : Cheguolin Day period: 2013-6-3 摘要 随着计算机技术、通信技术、网络技术和自动控制技术的迅速发展，，，，， 本文以水电站砂石加工系统的设计为背景，，Profibus-DP现场总线，S7-300系列带有以太网接口的PLC模块CPU315-2PN/DP，ET200M系统， 本文对砂石加工自动控制系统的需求和控制任务进行说明，介绍砂石加工自动控制系统的总体结构、设计思路、硬件选型、软件设计等详细实现过程。编写了粗碎车间的PLC控制程序，，PLC 关键词:分布式控制；S7-300；PROFIBUS-DP；无线通信；砂石加工；粗碎 Abstract Along with the rapid development in computer technology, communicationtechnology, network technology and automatic control technology, great changes havetaken place in level and control range of the industrial automation. In order to adapt tothese changes, the control system is no longer the traditional centralized manner thatputs all field instruments and apparatuses together, but appears the distributed controlsystem which is consists of process control level and process monitoring level. It withthe network as the core, it will be linked by the sites which distributed in weredifferent locations of industrial field,has formed the control mode withdistributed control, centralized operation, classification management, configureconvenient, flexible configuration. This paper focuses on study the method of construct distributed control system asthe design of sandstones processing system in the hydropower station for thebackground. In this design, Profibus-DP fieldbus is used in device layer, the fieldnode and control node based on connection mode of the wireless Communication.The master controller adopt Siemens S7300 series with Ethernet interface controller.CPU 315-2 PN/DP,salve station use ET200M module, wireless communication module in master station is use Siemens wireless access