A02B-0259-C212

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描述

A02B-0259-C212

随着嵌入式技术的不断发展,嵌入式系统的应用越来越广泛,人们对于嵌入式系统功能的要求也越来越高,相应地其大容量数据存储和管理变得越来越重要。相对硬盘而言,FLASH等非易失性存储器具有体积小、功耗低、成本低、抗震强等优点,已在嵌入式系统中被大量作为存储设备使用,而大容量非易失数据存储方案的应用还存在成本和软件支持方面的问题需要克服。大页NANDFLASH具有写入速度快、容量大、成本低等优点,适合于需要进行数据存储的场合。YAFFS2作为专门支持大页NANDFLASH的文件系统在U-Boot和嵌入式Linux上一直没有得到正式支持。本文结合部队应用实际,在嵌入式Linux系统中实现了大页NANDFLASH和YAFFS2文件系统的结合,为装备的数据存储处理搭建起了小型的智能化平台。本文内容安排如下,首先介绍系统存储方案特点和YAFFS2数据在大页NANDFLASH上的储存方式,然后详细叙述系统移植和文件系统制作过程,最后对移植结果进行测试。系统存储方案设计
某国产化设备用于取代随装多台套设备,除完成原设备的数据记录功能外,还需进行数据翻译、判读,数据分析处理,二维显示和三维动态复现等功能;同时,需存储装备长时间工作输出的所有原始数据信息,类似黑匣子功能,以供事后分析使用。具有程序量大,数据需实时存储,且数据存储量大的特点。板上存储设备包括SDRAM和FLASH,SDRAM为易失性存储器,作为程序的运行空间和记录数据的缓存空间;FLASH为非易失性存储器,用于存储系统软件程序和记录数据。

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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HP BL460C G6 BLADE 507864-B21 QC 2.53GHZ 2*300GB 4GB!!!

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DELL POWEREDGE R610 QUAD CORE E5530 2.4GHZ 8GB 146GB!!!

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SIEMENS SIMODRIVE LT INT 611 6SN1123-1AB00-0​CA3 .2X50A

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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。