Description
至于I/O模块呢,PLC与电气回路的接口,是根据输入输出部分(I/O)进行的。I/O模块集成化了PLC的I/O电路,其输入暂存器表明输入信号状态,输出点表明输出锁存器状态。输入模块将电信号变换成数字信号进入PLC系统,输出模块反过来。I/O分为开关量输入(DI),开关量输出(DO),模拟量输入(AI),模拟量输出(AO)等模块。
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