描述
一種利用外接電位器進(jìn)行頻率設(shè)置,F(xiàn)R-500系列變頻器的10端子提供標(biāo)準(zhǔn)的10V直流電壓,2端子是頻率設(shè)定輸入端,5端子是模擬量輸入公共端子。通過調(diào)整外接電位器R的2端輸出電壓,改變了變頻器2端的輸入電壓值,也就改變了變頻器的頻率設(shè)定值,達(dá)到了頻率設(shè)置的目的,該方法有以下優(yōu)點(diǎn):
(1) 接線簡單,只需把電位器的三端分接到變頻器的電壓輸入端,電壓輸出端和公共端就可。
(2) 頻率設(shè)置簡單,操作方便,只需輕輕轉(zhuǎn)動外接電位器的旋鈕,就可以進(jìn)行頻率設(shè)置。
(3) 安裝靈活,可以根據(jù)實(shí)際需要,將外接電位器安裝到任何位置,進(jìn)行遠(yuǎn)距離操作法,第一種是利用外接電位器進(jìn)行頻率設(shè)置;第二種是利用變頻器控制端子的特寫功能,用電動電位器進(jìn)行頻率設(shè)置。
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