Arduino UNO & Danfoss FC51 VFD Modbus communication using MAX485 TTL to 485 converter

I am new in Arduino programming & not able to read or write data to VFD from Arduino. can anyone help me for coading

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No wiring diagram, no link to the VFD manual, no description of what exactly should be achieved. Provide the necessary information, otherwise we're unable to help.

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