3HAA1001-186 ABB

ABB 3HAC15520-2
ABB 3HAC15887-1
ABB 3HAC15520-1
ABB 6896134-AA
ABB 6896901-282
ABB 6369901-280

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电话: +86 13333414714
邮箱: sales@rsplcdcs.com
联系人:王语嫣
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Description

PLC上电后,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

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