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liuheng_929
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樓主  發(fā)表于: 2009-08-24 08:54
      請問(wèn)各位老師我想用S7-200CN與EM231CN加壓力變送器控制一個(gè)儲水罐的液位，如果液位低于設定值則啟動(dòng)水泵，如果液位高于設定值則關(guān)閉水泵。但因本人從未做過(guò)類(lèi)似程序。請問(wèn)該程序將如何編輯，或有更簡(jiǎn)單的控制方法請指教
liuheng_929
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1樓  發(fā)表于: 2009-08-25 14:34
比較指令怎么來(lái)操作，請詳細敘述操作過(guò)程

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