基于PLC和触控屏的远程变频调速监控系统设计

Design of remote frequency control monitoring system based on PLC and touch screen

针对PLC数模混合变频调速控制系统的可靠性受环境影响大、成本高、维护周期长等缺点,设计了一种远程通信变频调速的PLC控制系统。采用Modbus RTU通讯协议、RS485通信方式、PLC及触控屏实现交流电机的精准连续调速,实时获取变频器和电机的工作状态与故障情况。实验结果表明,该设计是一种调速精度高、易于扩展的变频调速控制系统。

To the shortcomings of the digital analog hybrid frequency control system based on PLC such as greatly affected by the environment,high cost,and long maintenance cycle.A remote communication frequency regulation through PLC is designed.The Modbus RTU protocol,RS485,PLC and touch screen are used to realized accurately continuous speed regulation in AC machine,getting the real-time information of its running states and fault conditions.The experimental results show that it can improve precision and expand easily.