PR6426/010-140 EPRO

DS3800NVCD1D1D
DS3800NVCD1B1B
DS3800NVCD1B1A
DS3800NVCD1D1C
DS3800HMPJ1A1D
DS3800HMPJ
GE-261A1812P002/EG1033AA01 REV E
GE-261A1812P002/EG1033AA01 SERIES 2
GE-261A1812P002/EG1033AA01 REV H
IC3603A177

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描述

PLC梯形图中的某些编程元件沿用了继电器这一名称,如输入继电器、输出继电器、内部辅助继电器等,但是它们不是真实的物理继电器,而是一些存储单元(软继电器),每一软继电器与PLC存储器中映像寄存器的一个存储单元相对应。该存储单元如果为“1”状态,则表示梯形图中对应软继电器的线圈“通电”,其常开触点接通,常闭触点断开,称这种状态是该软继电器的“1”或“ON”状态。如果该存储单元为“0”状态,对应软继电器的线圈和触点的状态与上述的相反,称该软继电器为“0”或“OFF”状态。使用中也常将这些“软继电器”称为编程元件。

 

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