Hi Dave.
I fix the problem with your help and the problem and communication is running.
Thank you very much.
Now I'm trying communicate a PID control for a motor on the simulink and send it by serial for arduino board.
But when I try send the data, happens a error with this message: The serial send block doesn't can use in time continuous.
If I try to corrected it trought the " Simulation --> Simulation Parameters--> Real time --> Interface in Simulink, appear other error saying that I can't work with the function of the PID controler without be on time continuous in Simulink.
What can I do to fix the problem?
Thank for attention.