Problem Z probe for Ormerod 1 (proxymi

Hi At present I am there [reprappro.com] in 2.4 setting the Z probe.And i have my Z1 probe which always stays between 700 and 900, and of the blow I don't manage to calibrate her somebody could he help me?

I also have another question on the calibration how to know or is situated the beginning of X0 Y0 and Z0 example: X0 is to consider in the point has? Or in the point B.
If the Z probe does not how work to exceed this value to be able to print?


Ps : I try to connect the bleu connector Proximity Sensor in six By leaving of the right the second column (the web interface answer 200) and after that i try to connect the bleu connector Proximity Sensor in nine By leaving of the right the second column.