Nibe Heatpump integration, Nibe GW, Alpha Innotec Split 12 (Nibe SMO40)

I try to integrate Alpha Innotec Split 12 (SHK200S, which should be actually Nibe SMO40) heatpump through Nibe GW with HA. Modbus is opened in heatpump settings, no errors. HA ip is 192.168.1.28, Nibe GW ip is 192.168.1.25. But HA “Add integration” process throws error: “Error on read request from pump. Verify your Remote read port or Remote address”. What is wrong?