DP840 3BSE028926R1

在自动控制系统的设计中我们设计了3级故障显示报警系统，1级设置在控制现场各控制柜面板，用指示灯指示设备正常运行和故障情况，当设备正常运行时对应指示灯亮，当该设备运行有故障时指示灯以1Hz的频率闪烁。为防止指示灯灯泡损坏不能正确反映设备工作情况，专门设置了故障复位/灯测试按钮，系统运行任何时间持续按该按钮3s，所有指示灯应全部点亮，如果这时有指示等不亮说明该指示灯已坏，应立即更换，改按钮复位后指示灯仍按原工作状态显示设备工作状态。2级故障显示设置在中心控制室大屏幕监视器上，当设备出现故障时，有文字显示故障类型，工艺流程图上对应的设备闪烁，历史事件表中将记录该故障。3级故障显示设置在中心控制室信号箱内，当设备出现故障时，信号箱将用声、光报警方式提示工作人员，及时处理故障。在处理故障时，又将故障进行分类，有些故障是要求系统停止运行的，但有些故障对系统工作影响不大，系统可带故障运行，故障可在运行中排除，这样就大大减少整个系统停止运行时间，提高系统可靠性运行水平。

Westinghouse 4256A91G02 SUB N 3GHC13 WDPF Circuit Board

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