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 <title><![CDATA[PLS 和PLF什么意思！]]></title>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1415954.html]]></link>
 <description><![CDATA[Latest 50 replies of PLS 和PLF什么意思！]]></description>
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 <title><![CDATA[工控人家园]]></title>
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 <title><![CDATA[]]></title>
 <description><![CDATA[接能和断开的接通一个周期]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1415954#1388566.html]]></link>
 <author><![CDATA[yamqq]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Wed, 12 Dec 2012 02:40:28 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[ON-OFF通&nbsp;&nbsp;OFF-ON时通]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1415954#1388557.html]]></link>
 <author><![CDATA[wananjushi]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Wed, 12 Dec 2012 02:17:28 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[就是上升沿触发和下降沿触发，只有一个扫描的周期]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1415954#1388459.html]]></link>
 <author><![CDATA[rockyhuo]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 11 Dec 2012 14:43:32 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[谢谢大家]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1415954#1388412.html]]></link>
 <author><![CDATA[lovetown8]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 11 Dec 2012 13:07:58 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[看看三菱手册，很详细的解释]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1415954#1387074.html]]></link>
 <author><![CDATA[wuliang211]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 08 Dec 2012 07:28:20 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[应该讲OFF-ON 和OFF-ON]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1415954#1387061.html]]></link>
 <author><![CDATA[kevinzang]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 08 Dec 2012 07:08:13 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[PLS 上升沿接通指令，PLF下降沿接通指令，在触点接通或断开的瞬间，接通Y、M，时间是一个扫描周期。仅限于Y、M两元件。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1415954#1386994.html]]></link>
 <author><![CDATA[sss6491]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 08 Dec 2012 03:44:37 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[ON-OFF通&nbsp;&nbsp;OFF-ON时通]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1415954#1386955.html]]></link>
 <author><![CDATA[jun888006]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 08 Dec 2012 02:48:59 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[PLS與PLF是相反的功能前者是上緣觸發有效後者為下源處發有效~~~~~~~~]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1415954#1386944.html]]></link>
 <author><![CDATA[user08x]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 08 Dec 2012 02:30:20 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[PLS上升沿触发指令，即触点接通一瞬间吸合；PLF上升沿下降指令，及触点接通一瞬间断开]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1415954#1386894.html]]></link>
 <author><![CDATA[guifeng1987]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 08 Dec 2012 01:04:27 +0000]]></pubdate>
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