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本文从微机系统中行列式键盘的工作原理出发,以基于PLC的3行3列键盘的设计过程为例,提出了一种在PLC系统中设计行列式键盘的一般方法。
This paper starts with the working principle of determinant keyboard in microcomputer system. Taking the design process of 3 rows and 3 columns keyboard based on PLC as an example, this paper presents a general method of designing determinant keyboard in PLC system.