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可编程控制器的定义是什么?为什么说可编程控制器是一种数字的电子系统?

问答题
2021-09-02 11:27
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正确答案
国际电工委员会(IEC.于1985年在颁布的可编程控制器标准草案第二稿中,给PLC做了如下定义:“可编程控制器是一种数字运算器,是一种数字运算操作的电子系统,专为工业环境应用而设计。它采用可编程序的存储器,用来在其内部存储执行逻辑运算、顺序控制、定时、计数和算术运算等操作的指令,并通过数字式、模拟式的输入和输出,控制各种机械或生产过程。”因为PLC实际上是一个计算机,内部处理的是数字信号,所以说是一种数字的电子系统。”
因为PLC实际上是一个计算机,内部处理的是数字信号,所以说是一种数字的电子系统

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