Just help to first use about modbus HOT 4 CLOSED

I attach the screenshot of "modpoll" a simple client the read the same registry.
Bye

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Capture the requests from each software using Wireshark and see what’s different.

from modbus.

Thanks for the answer, I will do. Can I ask if I'm using in the right way request object?

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Yes, but you're reading 3 registers instead of 1 like you are with modpoll. You also need to read a short from the buffer (2 bytes), not an int (4 bytes), because each register is only 2 bytes.

I'm not sure if modpoll uses 1-based or 0-based addressing, either, so the Wireshark capture may help determine the difference.

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