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ljliuwei
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樓主  發(fā)表于: 2010-07-26 21:41
我用S7-200  CPU224的來(lái)編程,對于模擬量的輸入用Scaling.mwl指令庫來(lái)轉換是可以的,但是要把模擬量的輸出(如AQW0)的值要在組態(tài)中讀出來(lái),又該怎么進(jìn)行轉換。還有就是
模擬量的輸入(如AIW0)值大于某個(gè)值時(shí)(如80.0),要讓它的輸出為4---20MA成線(xiàn)性增加該怎么編程(也就是說(shuō)當輸入的值一直大于80時(shí),則它輸出的4---20MA要一直變大,直到輸入的值小于80時(shí),輸出就停留在一個(gè)定值上。)謝謝。。。!

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