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From the output above, we can tell that Modbus connected device replied with a value "100" or data "01030164" (01→ address; 03→ function code; 01→ number of bytes; 64 (hex to dec=100)→ the reply).

Sending function code "3" command via Modbus TCP

Specifically for function code 3 (this will not work for any other function codes), you can use an additional option, like shown below: