摘要
文章介绍了Modbus RTU通信协议在变频驱动液压控制系统中的应用,采用基于RS485接口的Modbus RTU通信协议,实现PLC和各变频器之间的串行通讯,通过变频器改变交流电机的转速从而改变液压定量泵的流量。结果表明,该方法实时性好,现场布线简单,提高了系统的抗干扰能力。
This paper introduces the application of Modbus RTU Protocol in variable frequency hydraulic control system. The serial communication between PLC and frequency-converters is realized based on the Modbus RTU protocol of the RS485 interface and changes the flux of fixed displacement hydraulic pump by changing the AC motor＇ s speed.The experiment results showed that this control mothod greatly reduced the complexity of the circuit conjunction and improved the performance of disturbance rejection of the system.
出处
《组合机床与自动化加工技术》
2008年第5期37-39,44,共4页
Modular Machine Tool & Automatic Manufacturing Technique
基金
粤港关键领域重点突破项目(2004A10403023
2006Z013)
