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zhaotingjie
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樓主  發(fā)表于: 2010-11-04 11:36
本人新手，想把流量計的-5V—+5V的電壓信號傳到PLC，但不知道這個(gè)FC105怎么用，請指教一下吧。
下面這個(gè)是我做的實(shí)驗，但是調試不了，SF亮紅燈。
cpzt
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1樓  發(fā)表于: 2010-11-05 15:03
你的HI和LO 錯了
SCALE功能接受一個(gè)整型值(IN)，并將其轉換為以工程單位表示的介于下限和上限(LO_LIM和HI_LIM)之間的實(shí)型值。將結果寫(xiě)入OUT。SCALE功能使用以下等式：

OUT = [ ((FLOAT (IN) ?K1)/(K2-K1)) * (HI_LIM-LO_LIM)] + LO_LIM

LO是-5，HI是5
http://wyqpyx.com/read-gktid-68669-fpage-3.html

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