HP Agilent 5517C

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描述

HP Agilent 5517C

经验与教训
    DCS设备的内部安装接线和调试最好由最终用户的仪表自控和工艺人员承担,这对于了解系统情况,掌握系统优缺点,做好今后的维护开发和日常操作工作最为有利。
    在功能调试和系统联调过程中,不能仅仅是DCS厂家的事情,用户工艺操作人员一定要参加,仪表自控人员一定要参加,施工单位有关人员一定要参加和配合。
    通电以前,特别要做好UPS的电压波形、频率和接地的检查,还要检查DCS板卡开关的设置,最好由DCS厂家工程师负责这项工作。曾经发生过因供电电压超高烧坏多块电源卡和设备的情况,也有因板卡插错位置而烧坏的事故。美国、日本、西欧的设备电源一般用110V,中国要求220V,现在的DCS有的加了110V和220V切换开关,有的因供货不注意,又没有仔细检查,把220V加到110V的设备上造成损坏。
    当把现场信号线接到DCS端子以前,一定要测量其绝缘电阻和检查有无异常干扰信号,尤其在新装置施工尚未结束前,曾因为引进了电焊机或电气的强干扰信号而烧坏过安全栅、模块,因为一次表的接地烧保险的事也曾经发生过。
    硬件测试过程中,所有备件都必须经过全面检查,保证其完好的备用状态。
    测试过程中特别要注意修改内容的保存和转贮,一般一天工作结束后,必须拷贝,否则因多人操作,内容容易丢失。
    八、投运与考核
    1、系统的投运工作内容
    系统投运一般指装置开车DCS投入运行。DCS投入实际运行必须具备以下条件:
    (1)系统联调合格。
    (2)系统环境如空调系统、UPS供电系统、接地系统运行正常,符合技术标准,验收合格。
    (3)DCS维护人员经实际调试工作并考试合格,领取上岗证。
    (4)工艺操作人员、车间主任培训合格,领取上岗证。
    (5)系统备件经过调试处于备用状态。
    (6)DCS操作手册、故障处理手册等资料下发到操作和维修人员手中。
    (7)DCS厂商有经验的工程技术人员现场服务。
    2、系统考核
    DCS的考核时间最好选在工艺装置正常运行后开始,一般为72小时,保证值规定如下:计算机模件的开工率为99.95%,DCS的开工率为99.99%,开工率的计算方法:
    开工率=(考核时间-事故时间)/考核时间

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
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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。