Modbus communication example for Arduino UNO and TOSHIBA's motor inveter VF_nC3 series.
https://www.toshiba.co.jp/sis/en/ind_sys/inverter/vf_nc3.htm
The driver's RS485 protocol have to be set as Modbus (The parameter F829 has to be set as 1).
Build target : Arduino UNO + Ethernet Shield
[Arduino - RS485]
D0 - RXO
D1 - TXI
D3 - TX_ENABLE + RX_DISABLE