140CPU43412U
140CPU43412U
可编程控制器的基本性能可用如下八条予以概括：
5.1工作速度
工作速度是指PLC的CPU执行指令的速度及对急需处理的输入信号的响应速度。工作速度是PLC工作的基础。速度高了，才可能通过运行程序实现控制，才可能不断扩大控制规模，才可能发挥PLC的多种多样的作用。
PLC的指令是很多的。不同的PLC。指令的条数也不同。少的几十条，多的几百条。指令不同，执行的时间也不同。但各种PLC总有一些基本指令，而且各种的PLC都有这些基本指令，故常以执行一条基本指令的时间来衡量这个速度。这个时间当然越短越好，已从微秒级缩短到零点微秒级。并随着微处理器技术的进步，这个时间还在缩短。
现货，现货，降降降，火火火，火火火……
现货，现货，降降降，火火火，火火火……
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