Hi, I am tracked in the communication. I want write a program to read and write the variables in the drive board. And then I can write another program to aotumactically write the variable unit, iterate through all the units and then find the best unit. I have been worked on this program for almost two weeks. I can read the variables in the drive board now. Here is my gui.

And the next step is to set the speed and make the motor run.