DCS20-50EM9C

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电话:18150087953 / 18005022138

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Email：sales@cxplcmro.com

描述

DCS20-50EM9C

 数据采集系统只是把现场信号采集到控制计算机中，在计算机中没有回路控制功能块。只是供人机界面显示。应该说是比较简单的。再硬件结构吧上它可以分成***，也可以是两级。分别是I/O板、控制器和人机界面。简单的可以I/O板和人机界面。不过，一些行业有一些特殊要求。如电厂的控制系统往往把锅炉控制和数据采集系统分开。锅炉控制采用DCS，而其他采用数据采集系统（DAS）。国际上也有许多厂家生产数据采集系统。在一般情况下，数据采集系统在技术上是没有问题的，但在电厂就有一些特殊要求。电厂的有一些点需要记录事件顺序。有快速中断功能（通常是2豪秒）。这样的点数量不多，大约100点左右的开关量。输入板的分辨率应该是毫秒级的。它的难点是事件顺序记录（SOE）。在输入板应该有存储历史数据的功能。当人机界面调出查看时，能把事件的时间顺序显示出来。SOE(SEQUENCEOFEVENT)有专门的厂家制造。一些专门用于电厂的DCS系统也有这样的功能。应用比较多的数据采集系统是美国的OPTO22产品，一路一个小模块，分别有开关量（DI、DO）和模拟量（AI、AO）的小模块。共有不同电压等级等42种小模块供用户选择。使用时，把小模块装在一块大板上（即B1板、B2板），模拟量8块/块板，开关量16块/块板，B1、B2板上除这些小模块外，还有串行通讯口。再把这两种板安装在一个架子上，再把架子安装在机柜内。以CRT为基础的人机界面在WINDOWS平台上运行。安装有带Modbus驱动软件的监控软件，以前用PAREGON软件，现在用的人少了，现在多用FIX、INTOUCH，人机界面就可以读取从小模块来的I/O信号，并在CRT上显示出来。在美国有20多家工厂生产这种类似的产品。它与STD总线的产品同一档次。STD总线的产品由于使用时用户的工程量太大，所以逐渐在退出市场。

产品承诺：
保 证 全新原装进口,
保 证 安全准时发货，
保 证售后服务质量，
优势价格，大量现货。

主营DCS系统配件
机器人系统配件
大型伺服系统配件
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PLC模块，可编程控制器，CPU模块，IO模块，AI模块，通讯模块。AB/施耐德/ABB/GE/本特利/西屋/英维斯/霍尼韦尔/黑马/FU克斯波罗

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选择深圳长欣，选择放心，售后无忧大量现货，当天顺丰发货！
主营：本特利，英维思，伍德沃德，福克斯波罗、西屋、瑞恩、施耐德莫迪康、ABB、AB、西门子、摩托罗拉、GE发那科、安川、博世力士乐，ACSO，力士乐等各大品牌的DCS系统配件，机器人系统配件，大型伺服系统备件。

先介绍几点经验。
1、先通读一遍“系统手册”（不管能不能看懂，先了解个大概，以便学习编程时查找）；
2、由位控逻辑入手，逐渐增加定时、计数等条件，把或、与、非关系理顺；
3、进而练习整数运算、实数运算、类型转换；
4、量程转换、PID调节回路的建立及P、I、D参数的理解（最好是有个物理回路验证，比如变频器+电机+测速传感器）；
5、循环、顺序、跳转等程序控制（尽量避免跳转，非跳不可时也是跳的越近越好）；
6、中断、通讯、位置控制....

本人以ABB工业机器人配件DSQC系列和Motorola MVME系列，GE 卡件 模块 驱动器系列为主攻。各位电工朋友可根据自己的条件选择适合自己的PLC品牌，由于PLC的基本框架大同小异，学会一种至于其它的学习起来也就简单了。

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