PLC控制系统一般设计方法:
1、分析控制系统的控制要求
熟悉被控对象的工艺要求,确定必须完成的动作及动作完成的顺序,归纳出顺序功能图。
2、选择适当类型的PLC
根据生产工艺要求,确定I/O点数和I/O点的类型(数字量、模拟量等),并列出I/O点清单。
进行内存容量的估计,适当留有余量。根据经验,对于一般开关量控制系统,用户程序所需
存储器的容量等于I/O总数乘以8;对于只有模拟量输入的控制系统,每路模拟量需要100个存
储器字;对于既有模拟量输入又有模拟量输出的控制系统,每路模拟量需要200个存储器字。
确定机型时,还要结合市场情况,考察PLC生产厂家的产品及其售后服务、技术支持、网络通信
等综合情况,选定性能价格比好一些的PLC机型。
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 福建宇创自动化设备有限公司座落于美丽的海滨城市——厦门。
 是一家多年专业从事大型系统备件(集散式控制系统、可编程控制器、冗余容错控制系统、机器人控制系统、大型伺服控制系统)等进口自动化系统备件、模块销售及系统集成的高新技术企业。
 对各自动化品牌产品有着强大的优势,公司配备专业的技术人员,旨为客户提供更优质的服务。 
 福建宇创自动化设备有限公司本着专业、诚信、合作、共赢、的经营理念,竭诚为客户提供更好的服务,更好的价格;欢迎来电垂询。
 RockwellAllen-BradleyReliance瑞恩:SLC500/1747/1746、MicroLogix/1761/1763/1762/1766/1764、CompactLogix/1769/1768、Logix5000/1756/1789/1794/1760/1788、PLC-5/1771/1785等
 SchneiderModicon(施耐德莫迪康):Quantum140系列处理器、控制卡、电源模块等?
 ABB:工业机器人备件DSQC系列、BaileyINFI90等 
 Siemens(西门子)伺服控制系统:SiemensMOORE,SiemensSimaticC1,6SN1118,6ES7416,6FC5103,6SN1123,6RB2026,6SC6100,6SN1145,6SN6111,6SC6101,6DR2100,SiemensS5系列
 Westinghouse(西屋):OVATION系统、WDPF系统、WEStation系统备件Invensys
 Foxboro(福克斯波罗):I/ASeries系统,FBM(现场输入/输出模块)顺序控制、梯形逻辑控制、事故追忆处理、数模转换、输入/输出信号处理、数据通信及处理等
 GEFANUC(GE发那科):模块、卡件、驱动器等各类备件 
 Yaskawa(安川):伺服控制器、伺服马达、伺服驱动器
 BoschRexroth(博世力士乐)伺服控制系统:IndramatMotorMAC,DCK04.3,BoschVersorgungs.I/O模块,PLC控制器,驱动模块等
 Woodward(伍德沃德):SPC阀位控制器、PEAK150数字控制器
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