Nature:肠道内微生物合作方式的探究
2020-05-04 08:42
[BR]Labview与PLC通讯[BR]Labview一般可以通过两种方式来控制PLC,或者说与PLC通讯。一种是发指令,比如OMRON的PLC,一般有hotlink跟FINS的指令格式,要查看PLC的编程手册知道他的指令格式才行,挺繁琐的。另一种就是上边有兄弟提的OPC server。要建立OPC server,需要安装PLC编程软件以外其他的软件(也就是说,并不是你把程序down到PLC里以后,labview就可以读到了),比如西门子的PLC,如果用ethernet模块通讯,要装个.NET软件包,AB的PLC则是跟编程软件在一起的,类似与RSlinx 500等之类的名字。一定要用这类软件先建立好你的server,在你的程序里把对应的group加到server里(其实就是内存地址,那些你要让labview访问的地址),之后你的OPC server就算建立好了。至于在labview里如何访问到OPC server,又有很多方法。比较常用的是用datasocket,点多的话就用DSC模块。
2009-06-11 16:07
STD-TIMHSGSPECIAL2P(NATURE)
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Defines that nature of actual radar signals and describes practical ways to measure power in those signals.
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non-operational nature, concerning accessories, specifications, and performance tests.
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Redox reactions are of central importance in sustaining all life and are mediated in nature
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Provides a Spanish translation of the 8712ET and 8714ET Network Analyzers User's Information (Spanish Translation)
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