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楊欣
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樓主  發(fā)表于: 2011-02-17 11:26
請問(wèn)各位大俠，我在用模擬量來(lái)控制變頻器速度 ，就是在運行過(guò)程中可以更改速度嗎，在程序中改變數字量的值，有什么值得注意的問(wèn)題嗎，謝謝指教
liu19916
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1樓  發(fā)表于: 2011-02-23 19:36
修改輸出模擬量的大小就可以改變變頻器的頻率，
一般設置會(huì )跟頻率的物理量不同，
只要相應在PLC做下對應的比例變換程序就可以了。
如0－10Mmin對應轉換為DC0－10V或0－20mA，
還需知道模擬量輸出模塊的轉換數字量

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