PLC用于旋转方向的检测

Detection of Rotating Direction Using PLC

介绍用接近开关通过PLC编程,实现对机械的旋转方向进行检测。由于主要用PLC的内部程序实现检测,所以该方法简单可靠。对外检测设备没有过高的要求,可以利用机械自身的齿轮或齿盘即可,通过对三相异步电动机的反接制动控制说明旋转方向检测的应用实例。

The method of adopting the proximity switches to detect rotating direction of machine by PLC program was introduced. Because mainly use the internal program of the PLC to realize detection, so the method is simple and credible. Since there are not the high request to the detecting equipents outward, it can use the gear of the machine or fluted disc. The application of detection of rotating direction is verified by inversed grafting braking control of three phase induction motor.