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)

Communication Parameters: Determine the communication parameters required by the FR-E720 VFD, such as baud rate, data bits, parity, and stop bits. These parameters need to match the settings configured in your Modbus master device (e.g., PLC, HMI).

Fuji Frenic Inverter Configuration

Enter the following communication parameters (I use 9600/8/1/E)
H30: 3 ( Use RS485 Port)
Y01: 1 (Station No.1)
Y02: 0
Y03: 2
Y04: 2 (9600bps)
Y05: 0 (Use 8bit)
Y06: 1 (Even)
Y07: 1 (Stop bit =1)
Y10: 0 (Modbus-RTU)
Y99: 0

Frequency Set Address (S05) = 07 + 05 = 705 (Hex) = 1797 (Dec)
Address Use = 1797 + 1 = 1798 (Dec)

VFD Control Address (S06) = 07 + 06 = 706 (Hex) = 1798 (Dec)
Address Use = 1798 + 1 = 1799 (Dec)
Set 1799 (Dec) = 1 >>> Motor Run Forward
Set 1799 (Dec) = 2 >>> Motor Run Revese
Set 1799 (Dec) = 0 >>> Motor Stop

Output Frequency Address (M08) = 08 + 09 = 809 (Hex) = 2057 (Dec)
Address Use = 2057 + 1 = 2058 (Dec)

Output Voltage Address (M12) = 08 + 0C = 80C (Hex) = 2060 (Dec)
Address Use = 2060 + 1 = 2061 (Dec)