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孟祥興
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樓主  發(fā)表于: 2011-04-01 22:58
         今天修了臺設備，用的是歐姆龍CPM1A  PLC,PLC輸出指示運行正常，但是其中一個(gè)點(diǎn)所驅動(dòng)的電磁閥不動(dòng)作，測量發(fā)現其沒(méi)有電壓，知其輸出繼電器有故障，修改了輸出點(diǎn)，故障排除。
   由此得出經(jīng)驗，就是我們在做設備時(shí)，在PLC輸出后加裝中間繼電器是非常有好處的，也證實(shí)了我以前做法的正確性
冰糖
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1樓  發(fā)表于: 2011-04-02 22:34
加中繼是好，但增加了成本，也增加了柜子的體積，根據負載情況看吧
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