PLC的變頻器控制電機正反轉接線圖
1．按接線圖將線連好后，啟動電源，準備設置變頻器各參數。
2．按“MODE”鍵進入參數設置模式，將Pr.79設置為“2”：外部操作模式，啟動信號由外部端子（STF、STR）輸入，轉速調節由外部端子（2、5之間、4、5之間、多端速）輸入。
3．連續按“MODE”按鈕，退出參數設置模式。
4．按下正轉按鈕，電動機正轉起動運行。
5．按下停止按鈕，電動機停止。
6．按下反轉按鈕，電動機反轉起動運行。
7．按下停止按鈕，電動機停止。
8.若在電動正轉時按下反轉按鈕，電動機先停止后反轉；反之，若在電動機反轉時按下正轉按鈕，電動機先停止后正轉。
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