11、干扰造成的故障

干扰造成的故障的实例也不少。系统的干扰信号可能来自于系统本身，也可能来自于外部环境。由于不同的系统对接地都有严格要求的规定，一旦接地电阻或接地方式达不到要求，就会使网路通信的效率降低或增加误码的可能，轻则造成部分功能不正常，重则导致网络瘫痪。 电源质量同样影响系统的稳定运行。用于系统的电源既要保证电压的稳定，也要保证在一路电源故障时，无扰切换至另一路电源，否则会对系统工作产生干扰。过程控制处理机主/备处理机之间的切换有时也会导致干扰。另外，大功率的无线电通信设备如手机、对讲机等在工作时，极易造成干扰，危及系统运行。

根据以往的DCS使用检修维护管理经验，总结了DCS常见故障，希望可以帮助更多在DCS维护方面欠缺的仪表人。

 
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