一种专门为在工业环境下应用而设计的数字运算操作的电子装置。它采用可以编制程序的存储器,用来在其内部存储执行逻辑运算、顺序运算、计时、(PLC is an electronic device designed for digital computing applications in industrial environments. It uses memory that can be programmed to store, perform logical operations, sequenc