Almost… :-)
You parameterized the modbus block as a client (active partner), so you should make screenshots from “iMOD_CLI…”, not “iMOD_SERV”. It is sure, that the communciation partner is parameterized as a server?
And please a screenshot from online parameter db from adress 130.0 (ID1_send_buffer - 1 page) and from ID_recv_buffer. Then it is possible to see, if any byte is sent and received.

Check if TSEND is a part of your project and has the correct FB number. I don't see any action of TSEND. In properties of the modbus block you see, which FB numbers are called. These FB numbers must be used for TSEND, TRCV and so on. If you use another FB with the number of the TSEND block, which the modbus block calls, then it doesn't work.

FB numbers and symbols must be the same like in the modbus block property. When you change the names or the FB numbers, that you have to rewire the FBs in the modbus block. Have a look at the manual, there is a chapter for rewiring of the internal called blocks.

yes, both has to fit. In chapter in manual it is described too

The best way is, to copy all modbus blocks and T blocks from the example project into another temporary project, rewire as described in manual and than copy all of these new blocks into your project. So it is sure that you don't change the existing blocks, which you are using in other OBs or FBs.