The singlehanded close communication protocol was used in DCS, standard communication protocol was used in FCS.

DCS采用独家封闭的通信协议,FCS采用标准的通信协议。

In many cases, the DCS was merely a digital replacement of the same functionality provided by analog controllers and a panelboard display.

很多情况下，字控制仅仅是种字式替，它的功能同多模拟控制器面板显示器所提供的功能样。