摘要
介绍以三菱FX3U-32MR PLC为主站,三菱变频器FR-A740-3.7K-CHT为从站的变频调速控制系统。重点介绍基于Modbus RTU协议通信规格编写的PLC主站通信程序,以实现PLC与变频器之间的通信控制。
The variable frequency speed regulating control system is introduced. The Mitsubishi FX3U-32 MRPLC is used as the host station and the FR-A740-3.7K-CHT is used as the slave station. The PLC host communication program based on Modbus RTU protocol is discussed in detail. The communication between PLC and inverter is implemented.
出处
《自动化应用》
2014年第12期37-40,共4页
Automation Application
