描述
控制器是DCS的核心部件,它相当于一台PC机。有的DCS的控制器本身就是PC机。它主要有CPU、RAM、E2PROM和ROM等芯片,还有两个接口,一个向下接收I/O总线来的信号,另一个接口是向上把信号送到网络上与人机界面相连。ROM用来存贮完成各种运算功能的控制算法(有的DCS称为功能块库)
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