135613-02 BENTLY
它采用控制分散、操作和管理集中的基本设计思想,采用多层分
级、合作自治的结构形式。其主要特征是它的集中管理和分散控制。
DCS多注重于控制。
DCS结构
(1)现场控制单元
现场控制单元的结构是由许多功能分散的插板(或称卡件)按照
一定的逻辑或物理顺序安装在插板箱中,各现场控制单元及其与控制
管理级之间采用总线连接,以实现信息交互。
现场控制单元的硬件配置需要完成以下内容:
插件的配置根据系统的要求和控制规模配置主机插件(CPU插
件)、电源插件、I/O插件、通信插件等硬件设备;
硬件冗余配置对关键设备进行冗余配置是提高DCS可靠性的一
个重要手段,DCS通常可以对主机插件、电源插件、通信插件和网络、
关键I/O插件都可以实现冗余配置。
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GE公司GE Speedtronic Spares可变调速装置备件:343,365,450,600,610,814,1500,2272,2862,3001,3010,3130,3476,4153,4157,5806
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,82262,98038,109452,114627,136855,148811,174600,200153,281048,282232,312602
,376911,387532,398530,398554,398557,398637,398682,398697,398737,398779,398785
,398803,398875,398879,398887,,98985,399137,399601,408222,408230,469480
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