I am using Twido 40 DRF to communicate with Magelis XBTN400 HMI to monitor some temperatures which are in % Mw0 % Mw1 ...and so on.

I am using Modbus and the communication setting at Twido is
Baud rate: 9600
Parity: Even
Stop bit: 1

The settings are same at Magelis.

I am geting ???? at the fields where I should see the temperature.

What could be causing this?

Thanks.

 

PARITY MUST BE SET TO NONE.

That simple!

 

I have a same problem with xbt-n200 and the solution was change the pinout. your magelis contain de telemecanique logo in the up-righ? please let me know if yuo still have a problem, and I send you a e-mail with the pinout