Thank you for your respons!
The paramenter are difficult for me to interpret.
But, hey, it works! :)
Only with:
G28; Home all Axis
G1 X100 Y100 Z30 F2800; near object surface
G30 H0 R0; measure z height
M117 Printing . . .; Nozzle ist perfect over the object.
And Yes, M206 is a good idea.
Example:
M206 T3 P808 X2.900; write Z-probe height [mm] to EEPROM
M501; Load settings from EEPROM (I'm not sure if it needs)