Customizable button. How to update variable value?

[MARIOBASZ]

I want to perform the z probe:
1- go to the probe location in G53
2- Z probe at speed 1200
3- raise 3 mm
4- Z probe at speed 200
Up to here, ok.
The problem is getting to the real value of the Z probe (I can trick the machine by making it go up 0.29 mm):
If I send the command G53 G0 Z [prbz] it goes to the value saved at the beginning, which has not been updated. Is there a way to update this value?

[JipeB]

Sorry for the late response. If I understood the question correctly, it is about updating Z0 taking into account the height of the sensor/touch plate. In this case you must use G10 L20 P1Z[probe]. P1 is for workspace G54; for G55 and following you must use P2..P6.
J.P.