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akang8612
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樓主  發(fā)表于: 2013-04-09 10:16
大家好,最近遇到了一個(gè)問(wèn)題,請大家指點(diǎn)。PLC用西門(mén)子200的

檢測出口溫度來(lái)控制20個(gè)風(fēng)扇, 溫度高于設定值就啟動(dòng)一臺風(fēng)扇,一分鐘后溫度還高于設定值就啟動(dòng)下一臺風(fēng)扇,。。。。一分鐘后溫度降到設定值以下就關(guān)閉一臺風(fēng)扇。
上面的動(dòng)作容易實(shí)現,現在的問(wèn)題是每個(gè)風(fēng)扇都有手動(dòng)和自動(dòng)兩個(gè)狀態(tài)。
假如說(shuō)現在1,6,9,18,20。5臺在自動(dòng),其余手動(dòng)
溫度高于設定值啟動(dòng)1,溫度還高于設定值怎么才能跳過(guò)2,3,4,5    直接啟動(dòng)6呢?

我考慮的是為每臺風(fēng)扇編號,首先檢測哪幾臺在自動(dòng)狀態(tài),然后控制,可是這樣邏輯太復雜了
有沒(méi)有簡(jiǎn)單的辦法????
[ 此帖被akang8612在2013-04-09 15:28重新編輯 ]
zhb88888
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1樓  發(fā)表于: 2013-04-09 10:36
可以將自動(dòng)狀態(tài)輸入到雙字節字中然后用移位一個(gè)整循環(huán)來(lái)控制

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