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kayling888
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樓主  發(fā)表于: 2009-04-27 10:32
[upload=2]           本人現遇到一新情況，請各位對西門(mén)子變頻器熟的大俠能指點(diǎn)下��！
     情況如下：
    
     MM430一臺，7.5HP
         使用時(shí)間不詳，但不會(huì )過(guò)5年，現使用方式，是端子控制。頻率大小為模擬量0-10V控制。
     現在出現的情況如下，更換到新的電箱，用屏控制制。接線(xiàn)圖如下：

現在已能控制，也能在屏上調速，但是不能持久，過(guò)不了多長(cháng)時(shí)間就自動(dòng)降速，請問(wèn)這是什么原因？

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