HEIDENHAIN iTNC 530 User Manual page 336

Restrictions
After an external or internal stop, you can only re-enter
the contour with the function RESTORE POS. AT N.
Before you start the block scan, you must cancel M120
(select program again via PGM MGT, do not use GOTO
0), otherwise the TNC will output an error message
When using the path functions G25 and G24, the blocks
before and after G25 or G24 must contain only
coordinates in the working plane.
If you enter an LA value that is too great, the edited
contour might change, because the TNC might then
output too many NC blocks
Before using the functions listed below, you have to
cancel M120 and the radius compensation:
Cycle G60 Tolerance
Cycle G80 Working plane
PLANE function
M114
M128
M138
M144
TCPM FUNCTION (only conversational)
WRITE TO KINEMATIC (only conversational format)
336 Programming: Miscellaneous Functions