电动执行器具有动作快、特别适用于远距离的信号传送、便于和电子计算机配合使用等优点。一般来说，电动执行器不适用于防火防爆的场合。但如果采用防爆结构，也可以达到防火防爆的目的。报警故障：DCS控制系统一些点设有报警信号，处理报警信号时要分清楚报警类别，如：罐里没有液位，造成液位低报，现在要分析低报的原因，进液阀没动作，调节关系值设定不好，液位变送器测量不准，还是液量太小等因素，按检查的结果具体处理。

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