To communicate with a Mitsubishi FR-E720 series Variable Frequency Drive (VFD) using the Modbus RTU protocol, you'll need to configure both the VFD and your Modbus master device (such as a PLC or HMI) accordingly

Communication Parameters:

1. Determine the communication parameters required by the FR-E720 VFD, such as baud rate, data bits, parity, and stop bits.
2. Ensure that these parameters match the settings configured in your Modbus master device.

Schneider ATV312 Parameters Setting
Setup the communication parameters as follows:
COM Menu >>> Add = 1 (Modbus Address)
tbr = 9.6 (Baud rate)
tF0 = 8E1 (8bit, Even, Stop bit 1)
tt0 = 3.0 (Timer Detect Com. Error)
CtL Menu
LAC = L3
Fr1 = Mbd
Fr2 = Mbd
CHCF = SEP
Cd1 = Mbd
Cd2 = Mbd
Control Word = 8501 (dec) = 2135 (hex)

Set 2135 (hex) = 6 >>> Enable Operation
Set 2135 (hex) = 128 >>> Fault state reset
Set 2135 (hex) = 15 >>> Forward Run
Set 2135 (hex) = 2063 >>> Reverse Run
Set 2135 (hex) = 4111 >>> Stop Run

Frequency Set Address = 8502 (dec) = 2136 (hex)
Output Frequency = 3202 (dec) = C82 (hex)
Output Current = 3204 (dec) = C84 (hex)

PLC/HMI Configuration:

1. Configure your Modbus master device (e.g., PLC, HMI) to communicate with the FR-E720 VFD using the appropriate Modbus RTU communication parameters and function codes.
2. Set up the communication channels and define the addresses of the VFD parameters you want to read or write.