Hello,
For this issue of yours, it's best to check the Modbus Master config if it is able to get values from the configured register. If the Modbus Master is able to do so meaning it's working fine. Now check the Data to Server functionality and check the settings if you didn't misconfigure things. Honestly, the shared images for the configuration are blurred so I cannot further check I will need a copy of the troubleshoot file in this case for me to check more further.
Thanks
Regards,
Mellow