PLC简介 Introduction to PLC
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PLC(即可编程逻辑控制器)是机械控制中为替代必要的继电器时序电路而发明的一种设备。PLC工作时通过查询输入端并根据其状态打开或关闭输出。用户通常用软件或编程器输入程序,从而获得期望的结果。 A PLC (i.e. Programmable Logic Controller) is a device that was invented to replace the necessary sequential relay circuits for machine control The PLC works by looking at its inputs and depending upon their state, turning on/off its outputs. The user enters a program, usually via software or programmer, that gives the desired results. |