ixo65

Are the LOGO! and the Circutor CEM M ETH connected directly?

If not, try that. And no connection at same time between PC and Circutor CEM M ETH.

 OK, thanks, just tried but no voltage data on the LOGO display :(

ixo65

Then is another problem. This is not a LOGO! problem ...

 But... When I use modbus software in my pc the CEM M ETH works perfect, it gives voltage data and others. The problem is when I connect the LOGO to the network.

Do you think it could be related with the type of data (HEX and DEC)?

Update: 

I have asked to Circutor, the say the device is a modbus tcp server, and they will check the problem.