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supermax
級別: 工控俠客
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樓主  發(fā)表于: 2014-01-05 09:52
有6路開(kāi)關(guān)量信號輸入,當全部沒(méi)信號時(shí)變頻器停止,當有任意1一2路輸入有信號時(shí)低速運行,當任意3一4路輸入有信號時(shí)中速運行,當任意5一6路輸入有信號時(shí)高速運行,變頻器保持跟隨狀態(tài)。pLc用歐母龍CPM1
chenpingyg
機械是柱石,電氣是靈魂.
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1樓  發(fā)表于: 2014-02-11 01:00
用三菱PLC講解一下思路吧,X0-X5作為6路輸入點(diǎn),D0-D5分別對應X0-X5,初始化脈沖將D0-D5置零。然后用D0-D5相加的結果來(lái)判斷有幾路輸入,結果小于3就輸出Y0做低速運行,結果大于2并且小于5就輸出Y1做中速運行,結果大于4就輸出Y2做高速運行。Y0、Y1、Y2做OR運算,驅動(dòng)Y3將變頻器使能。
變頻器多段速參數設置三個(gè)速度的不同頻率。
自己的事情自己做.

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