New build

They do not show on the IO tabs, they show on the first 7i77 page where the axis are set up.
The only latency number that needs entering or changing is the Base_period when using parallel port, Servo_period should not be changed.

So I'm trying to run the test and tune and got this error. I have all the encoders reading. I included a shot of the error and also some io pages , I tried to launch the test panel on these pages and nothing happeneds.

Do not use pncconf for tuning, if i remember correctly it is for open loop testing, but i never used it.
Use this:
forum.linuxcnc.org/10-advanced-configura...ning-detailed-how-to

What does the max output in servo calibration page do?

Max output is exactly that, the maximum the controller will output to the servo drive, it is used in cases where limiting the output to a certain value is needed.
It is also dependent on the output scale and output min and max values.
I would not touch that.
In the how to it is clearly explained what to set and tune and why and how, the rest should not be changed.