R151244012

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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!
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描述

R151244012

系统功能要求
    (1)数据采集和存储功能:模拟输入信号的扫描时间,数字信号的扫描时间,历史数据存储(包括调整趋势、历史趋势)的种类、点数和周期,输入信号的处理功能。
    (2)控制功能:具备完整的监测、调节和顺序控制功能及设备运行监视、联锁保护等功能,反馈控制功能的最大能力(输入输出的种类、数量、逻辑运算能力、顺序步骤,执行周期),过程控制语言能力(如ST、FORTRAN,BASIC,C或其他的控制语言),先进控制软件的要求。
    (3)显示功能:CRT尺寸、颜色,画面刷新时间,画面种类与数量。显示画面包括总貌画面、流程图画面、控制分组画面、调整画面、趋势画面、过程报警画面、系统报警画面、系统状态画面、操作日志画面、历史查询画面等,并具有窗口(多个、拉伸、重叠)显示功能,汉字功能以及触屏功能。
    (4)报警功能:模拟输入/输出信号报警(绝对报警、变化率报警),数字输入/输出信号报警,仪表停用(校验、停扫描)报警,系统部件(卡件、网络)故障报警,相邻报警时间分辨率,报警管理功能(如历史查询过滤、报警组设置、报警点组的优先级、报警抑制功能等)。
    (5)报表和屏幕拷贝功能:即时报表功能,定时报表功能(包括时报、班报、日报、月报、年报),报警汇总记录,操作记录报表,操作或参数修改打印,打印机屏幕拷贝功能。
    (6)操作安全:操作权限口令询问功能,工程师、操作员钥匙键功能,MAN/AUT/CAS切换无扰动功能,冗余措施。
    (7)系统的灵活性:系统可靠性指标,冗余冗错,系统扩展方便,新老产品的兼容性,与上位机通信接口及软件的实用性,与其它机种的通信(开放性)。
    系统功能要求是根据系统目标结合具体内容确定的,特别突出具体项目的特点:
    a、快速扫描的速度及顺序控制、联锁的执行周期,必须根据工艺指标提出具体要求。例如:某用户的一个装置引进DCS时因承包商对专利商在顺序控制方面的需要不清楚,到组态设计时,发现这种DCS的速度和容量均不能满足工艺的要求,只好又购买了一套PLC,增加了投资。
    b、目标在开发先进控制软件,则在控制功能上以及软件开发工具方面要侧重说明。

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
品牌:ABB   ,AB  ,GE,FOXBORO,本特利,英维思,伍德沃德,西屋,瑞恩,施耐德,西门子,摩托罗拉,安川。力士乐。ACSO,横河等进口品牌。 专业销售进口DCS  PLC系统备件模块
Triconex Siemens Yaskawa ABB GE Ovation AB Foxboro Motorola Schneider XYCOM KUKA
  专业销售进口DCS  PLC系统备件模块 15天包退换 一年质保 大量现货  国内实力库存商家

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Air Rover Portable Air Conditioner 27,400 BTU XL24

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专业销售进口DCS  PLC系统备件模块

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

15天包退换 一年质保 大量现货  国内实力库存商家


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。