Hi Gadelhas,
I've explained the purpose and use of both of those variables in the original thread but I'll try again.

pid_I_Clamp limits the amount of "power" that the integral term of the PID-filter is allowed to contribute with to the total output. When doing your "PID homework" you'll come across the term windup, the pid_I_Clamp provides a way to prevent that.

pid_Out_Clamp can be used to limit the total output of the filter. For example, if you your PWM generator has a resolution of 8 bits there's no need (and can possibly even be bad) for the output value to go above 255. The pid_Out_Clamp allows you to specify the maximum "output swing" of the regulator. Note that if you set it to 255 it can swing +/-255, if your system doesn't accept negative drive you need to take care of that "outside" of the filter.

I hope that answers your question.

/Henrik.