Writing to holding registers using Modbus TCP

Hi everybody.

I have a question regarding writing to holding registers using Modbus TCP. I am currently trying to make a VI that can control my SMA Sunny Island Inverter through Modbus TCP.

The reading of values from a holding register works fine with the inverter, but i have met problems when i try to write. Every time I try to write to holding register, Labview returns error 538183. I am kinda new to the program and not sure how to fix it.

Labview version: 17.0.1f1 on Windows 10

Regards

Jonas