1C31227G01 WESTINGHOUSE 输入映象寄存器

WESTINGHOUSE 1C31227G01
WESTINGHOUSE 1C31227G01
WESTINGHOUSE 1C31227G02
WESTINGHOUSE 1C31227G02
WESTINGHOUSE 1C31234G01
WESTINGHOUSE 1C31234G01
WESTINGHOUSE 1C31234G01
WESTINGHOUSE 1C31234G01
WESTINGHOUSE 1C31234G01
WESTINGHOUSE 1C31238H01
WESTINGHOUSE 1C31238H01
WESTINGHOUSE 1C31238H01
WESTINGHOUSE 1C31238H01
WESTINGHOUSE 1C31238H01
WESTINGHOUSE 1C31238H01

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Description

PLC在输入采样阶段,首先扫描所有输入端子,并将各输入存入内存中各对应的输入映象寄存器。此时,输入映象寄存器被刷新。接着进入程序执阶段,在程序执行阶段或输出阶段,输入映象寄存器与外界隔离,无论信号如何变化,其内容保持不变直到下一个扫描周期的输入采样阶段,才重新写入输入端的新内容。

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