M2AA112M-4 ABB

ABB M2AA 112 M-4
ABB PH/ORB SENSOR TB556J1E15T17 3KTC
abb SER1AL. NO:3K220000100601 TYPE:7651/0320/STD
ABB 1SCA022465R8210 Typ OETL 2500 K2
ABB PFRA 101 3BSE003911R230

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Description

自动重复执行程序扫描和I/O扫描,即输入采样、用户程序执行和输出刷新三个阶段。完成上述三个阶段称作一个扫描周期。在输入采样阶段,PLC以扫描方式依次地读入所有输入状态和数据,并将它们存入I/O映象区中相应的单元内,输入采样结束后

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