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 <description><![CDATA[不一定要读取变频器的实际频率,可以在变频器里设定上限,下限频率,然后输出开关量信号,PLC读开关量信号,
我做恒压供水的,就这么干]]></description>
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 <author><![CDATA[liguian]]></author>
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 <pubdate><![CDATA[Wed, 15 Apr 2009 03:19:48 +0000]]></pubdate>
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