161 
8 Modbus-RTU communication 
The company provides users with the general RS485 communication interface in industrial control. 
The communication protocol adopts MODBUS standard communication protocol, and the servo can be 
used as the slave station to communicate with the master device (such as PLC controller and PC) with 
the same communication interface and the same communication protocol, and the HMI can also be 
connected  through  the  communication  interface.  Realize  the  remote  operation  of  the  frequency 
converter by the user. 
This series of  servo Modbus communication protocol supports RTU mode. The  following is a 
detailed description of the communication protocol. 
8.1 Communication wiring 
1. RS-232 communication wiring 
 
2. RS-485 communication wiring 
RS485
PLC, motion 
controller