3503E TRICONEX

The failure of DCS may involve factors such as controller,network communication,hardware failure,software failure,power supply,human,etc.,which involve a wide range of aspects.Experience has proved that the vast majority of DCS faults occur in field instruments,measurement lines and actuators,and safety barriers and power supplies also occur from time to time.DCS and process are closely linked.When an abnormality occurs,it is necessary to analyze whether the measurement and control parameters are in a normal state based on the actual working conditions,so as to judge whether it is a process problem or a DCS failure.Therefore,when checking the DCS fault,it is necessary to comprehensively consider,think,analyze and judge from the point to the surface.

DCS出现故障可能会涉及控制器、网络通信、硬件故障、软件故障、电源、人为等因素，其涉及面很广。经验证明DCS故障绝大多数发生在现场仪表、测量线路及执行器，而安全栅、电源方面也时有发生。DCS和工艺是紧密相连的，出现异常时要结合实际工况，分析测量控制参数是否处于正常状态，以此来判断是工艺问题还是DCS故障。因此，在检查DCS故障时，要综合考虑、从点到面的进行思考、分析、判断。