HEIDENHAIN TNC 320 User Manual page 317

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, otherwise the TNC will
output an error message.
When using the path functions RND and CHF, the blocks before
and after RND or CHF must contain only coordinates in the
working plane.
If you want to approach the contour on a tangential path, you
must use the function APPR LCT. The block with APPR LCT
must contain only coordinates of the working plane
If you want to depart the contour on a tangential path, use the
function DEP LCT. The block with DEP LCT must contain only
coordinates of the working plane
Before using the functions listed below, you have to cancel
M120 and the radius compensation:
Cycle 32 Tolerance
Cycle 19 Working plane
PLANE function
M114
M128
TCPM FUNCTION
TNC 320 | User's Manual HEIDENHAIN Conversational Programming | 5/2013
Miscellaneous functions for path behavior
9
9.4
317