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 <title><![CDATA[闹钟]]></title>
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 <description><![CDATA[Latest 50 replies of 闹钟]]></description>
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 <description><![CDATA[1 .首先在编程环境中，找到 PLC（P）菜单，里面有个实时钟，读取PC,设置PLC
2.执行如下语句
LD&nbsp;&nbsp;&nbsp;&nbsp; SM0.5
EU
TODR&nbsp;&nbsp; VB0

执行这段语句后
VB3=时
VB4=分
VB5=秒

使用比较指令 ,置输出位
输出=1后开启计时器，计时5分钟后，复位输出位]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1411362#1385257.html]]></link>
 <author><![CDATA[醉湮邃虞]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Mon, 03 Dec 2012 13:53:06 +0000]]></pubdate>
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 <description><![CDATA[加我QQ544277166我传你（注明西门子PLC）]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1411362#1385139.html]]></link>
 <author><![CDATA[haolunxiu]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Mon, 03 Dec 2012 08:38:35 +0000]]></pubdate>
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