说明：  可编程控制器简称PLC是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、计数和算术运算等操作的指令，并能通过数字式或模拟式的输入和输出，控制各种类型的机械或生产过程。
(Programmable logic controller (PLC) is an electronic device designed for digital operation in industrial environment. It uses the memory that can be programmed to store the instructions of the operations such as logic operations, sequential operations, timing, counting and arithmetic operations, and can control various types of mechanical or production processes through digital or analog input and output.)