| 基于Modbus RTU协议的FX3U PLC与变频器的通信设计 |
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| 引用本文： | 陈荷燕.基于Modbus RTU协议的FX3U PLC与变频器的通信设计[J].变频器世界,2014(11):52-56. |
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| 作者姓名： | 陈荷燕 |
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| 作者单位： | 南京工程学院 |
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| 摘 要： | 本文在阐述Modbus通讯协议的基础上,构建了基于Modbus RTU通讯协议的变频调速控制系统。该系统采用三菱可编程控制器中的小型至尊产品FX3U-32MR作为主站,支持Modbus RTu通讯协议的三菱变频器FR-A740-3.7K-CHT为从站,通过FX3U-485-BD扩展板进行连接,基于Modbus RTU协议通讯规格编写PLC主站通信程序,实现PLC与变频器之间的通信控制。
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| 关 键 词： | Modbus RTU通讯协议 可编程控制器 变频器 |
The analysis of high-speed train monitoring data based on Graphic simulation |
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| Chen Heyan.The analysis of high-speed train monitoring data based on Graphic simulation[J].THE WORLD OF INVERTERS,2014(11):52-56. |
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| Authors: | Chen Heyan |
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| Abstract: | This paper proposes a variable frequency speed regulating control system based on Modbus communication protocol. The control system is composed of a programmable controller （PLC） FX3U-32MR, which is used as a Modbus master station, and Mitsubishi frequency converter FR-A740-3.7K-CHT, which is used as a Modbus slave station. PLC connects with frequency converter by FX3U-485-BD expansion board. The communication program between PLC and frequency converter based on Modbus RTU communication protocol specification is presented, |
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| Keywords: | Modbus RTU communication protocol PLC frequency converter |
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