IS220PDIAH1A GE

GE IS220PDIOH1A
GE IS220PDOAH1A
GE IS220PGENH1A
GE IS220PHRAH1A

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Description

采用PLC程序控制的过程和结果与继电器逻辑回路是有区别的,特别是涉及到梯级的次序、脉冲信号的捕捉等,与PLC的扫描原理是密切相关的。实践中,大量的程序问题均源于此,常常会出现不可思议的结果。因此,设计PLC程序,必须精通PLC的基本原理。

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