公司名称：厦门岳航计算机工程有限公司

模块5X00070G04
ard K121-180 REV.C 718-562
被控制对象确定以后，选用什么样的控制系统就成为重要问题。主要是根据项目规模和投资预算来考虑的，以数字技术为基础的DCS系统和早期的模拟仪表组成的控制系统，从工程项目的实施来看，本质差别不大，主要考虑项目规模和投资预算，但DCS与模拟仪表相比，它更为复杂，技术性要求更高，下面我来谈谈DCS系统选型中的几个问题。从理论上来讲，DCS可以用与不同的工艺过程，它是通用的，但是，DCS的制造厂家专长与某一领域。如：HOMEYWELL主要用于石化部门，BAILEY公司的N90、INFI90主要用于电力系统，ROSEMOUNT的RS3、Δ-V大多用于化工系统。但也不能否认不同工艺过程会有一些特殊要求，如：电厂一定要有电调设备和SOE，石化部门一定要有选择性控制，水泥行业一定要有大纯滞后控制补偿等，选型时也要考虑这些因素。



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