Hi  kosmous.

I see in your datasheet that the content you want, start at address 16#1000 (hex). Your first query should therefor query 40001 + 16#1000 = 44097. 

Hello ola84,

that's correct !

So, for that reason i don't need to read the 1st register 40001.

Also too many registers from slave must be avoided ( not to include during reading ) because are not in consecutive adresses as i checked.

Slave reports error when i call to read a register that is not included in the allowable reading list despite the fact that it is a normal MODBUS register adress.

So i have to make the process using some more steps ( 7 i think ) and that's all.

I hope this conversation to help many guys before losing much time during comissioning.

Dear ola84, thank you very much for your very useful suggestions