I have to drive a Danfoss FC51 Frequency Inverter, with an HMI of the HNC brand, model TP2507. The protocol available on the HMI is MODBUS RTU, and MODBUS RTU EXTENDED.
I have no experience in handling the FC51 via MODBUS RTU. For example, I do not know the RS485 communication parameters of the FC51. I do not know how to set the FC51 LCP to work with MODBUS RTU, etc.
Please, I ask you to help me, thank you very much.
See my post, the last one in this thread, here:
Ignore the first sentence and start at "Modbus is a project. Congratulations, you're the project engineer!"
Your HNC TP2507, the HMI, will be the Modbus RTU master. Wherever the post refers to DCS, substitute "Modbus RTU master".
Your Danfoss FC51 is a 'drive', which will always a Modbus RTU slave.
The warning about different vendor slave devices on the same network does not apply because you have a point-to-point network.
The task is basically some research and experimentation to get your Modbus RTU network up and running.