R911285555 REXROTH

DS200IMCPG1C GE PC
DS200IOEAG1A GE
DS200IOMAF1ACF GE
DS200IOMAF1ACH GE PLC
DS200IOMAF1BDA GE PLC
DS200IOMAF1BDD GE
DS200IOMAF1BDE GE PLC
DS200IOMAF1BDF GE NET

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描述

PLC还要完成内部处理、通信处理等工作,一次循环可分为5个阶段(见图1-5)。PLC的这种周而复始的循环工作方式称为扫描工作方式。由于计算机执行指令的速度极高,从外部输入-输出关系来看,处理过程似乎是同时完成的。

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