RUT951 Modbus TCP Client Thingsboard RPC

Hello,

I’m currently in the process of putting a test setup into operation.
I have a RUT951 that I have configured as a Modbus TCP client. The requests are then transferred to Thingsboard using the Data to Server function. This all works very well.
However, according to the documentation, I don’t see any way to send RPC requests from Thingsboard to the RUT and process them.
Is there any possibility with LUA scripts?

Thanks in advance
Greets
Chris