Description
由于出现的是oop报警，自然怀疑是信号线断，对该信号线路进行检查，结果线路完好。先判断是其DCS卡件故障，对报警点的dcs卡件进行更换，但故障仍未得到解决。这时，我们意识到一定是存在干扰，从而对该dcs信号造成影响。为减少干扰，对仪表接地进行改造，但故障仍未解决。经过对该dcs信号点排查，最后只剩下由变频器送至dcs的信号线最值得怀疑。
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