Rs485 modbus fx5u mitsubishi plc and leadshine drive

Good day.

I have an issue connecting mitsubishi plc with a leadshine servo drive via rs 485 modbus serial.
Is there anybody that can assist me with this?
I am using a leadshine Elp servo drive elprs750z with a fx5u mitsubishi plc.
I do not have any experience on modbus serial programming and found a few examples and tutorials on different drives but i am not successful.
Please assist me if possible.