描述
运算速度高速化也是日本PLC系统追求的一个重要目标。由于目前PLC的CPU模块竞相采用32位RISC芯片，运算速度大为提高。一般基本指令的执行速度均达到数十个纳秒（ns），如三菱电机的Q02HCPU其输入指令的执行时间为34ns，富士电机MICREX-SX系列SPH300达20ns，横河电机的FA-M3系列的F3SP59-7S其输入指令的执行时间为17.5ns。
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