摘要目录前言参考文献【范例】.doc

摘 要 根据工业现场的需要和可编程控制器(PLC)自身通信的特点，本设计为基于1:N 网络的PLC 控制系统。在这个设计中，主要对上位 PC 机通过 RS485 总线与 N 台 PLC 控制系统之间构成的 1:N 数据通信网络构架设计，及其下位机 PLC 控制系统的设计,以实现上位机和各 PLC 控制系统之间的通信，进而对 PLC 下位机系统进行监测和控制。 在该设计中，PC机作为网络中的主机，N台日本三菱的FX2N PLC作为从机，构成基于RS485的1:N网络控制系统，完成对变频器调速等系统的控制；采用MCGS工业自动化控制组态软件，建立了上位监控系统，可动态地反映调速系统的工作状况。 【关键词】可编程控制器；1:N网络；PLC通信；MCGS Abstract According to the need of the industrial scene and the characteristics of ones own communication of the programmable controller (PLC), originally design just for because of 1:N PLC control system of the network. In this design, to going to the location PC through 1 that is formed between RS485 bus and N PLC control system especially 1: N data communication network framework is designed, and go to the design of PLC control system of the location machine，by realizing the location paying machine and communication between all PLC control system , then carry on the monitoring and control to PLC the next machine system. In this design, the PC as the host computer in the network, FX2N PLC of N suit of Japanese Mitsubishi is regarded as from the machine, form 1: N network control system of because of RS485, finishes adjusting and waiting for systematic control to the frequency converter rapidly; Adopt MCGS industrial automation to control the configuration software, has set up the monitoring system in the location of going to, but the attitude reflects that adjusts the working state systematic in speed. 【Key words】 Programmable controller；1:N network；PLC communication；MCGS 目 录 前 言 ………………………………………………………………………………… 1 一、项目介绍………………………………………………………………………… 2 1.1项目设计内容………………………………………………………………… 2 1.2项目设计具体要求…………………………………………………………… 4 二、总体方案设计………………………………………………………………… 8 2.1方案的提出与比较………………………………………………………… 8 2.2方案的选择与论证………………………………………………………… 9 2.3 系统总体设计………………………………………………………………10 三、控制系统的总体设计………………………………………………………12 3.1系统工作流程分析…………………………………………………………12 3.2 I/O信号分析………………………………………………………………12 3.3 PLC选型……………………………………………………………………15 3.4 PLC输入输出线路设计…………………