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Modbus是现场总线协议的一种,目前已成为一种应用于工业控制器上的标准通信协议。本文介绍了ModbusRTU通信协议在由PLC和变频器组成的智能通风控制系统中的应用,阐述了ModbusRTU的特点,并详细给出了系统结构及通信软件的设计方法。
Modbus is a type of fieldbus protocol that has become a standard communication protocol for use on industrial controllers. This text has introduced the application of ModbusRTU communication protocol in the intelligent ventilation control system which is made up of PLC and frequency converter, has expounded the characteristic of ModbusRTU, and gave the system structure and the design method of the communication software in detail.