描述
软PLC分为编译和解释两种实现方式,其中解释型有点像早期的大型机一样,是基于一个虚拟机的,程序由一些伪代码组成,工程师在上位机编好程后通过编译器转换为这种专用的伪代码下载到PLC内。运行时虚拟机扫描并解释这些指令运行,这样的实现方式使工程人员编的T型图之类的与底下PLC的软件平台无关,保证了PLC核心的独立性,同时它能很好的扩展软件和功能块而不受硬件环境的影响,但这种方式是最慢的一种方式。
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750 AMP HIGH VACUUM DEPOSITION CRUCIBLE DC POWER SUPPLY
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