HEIDENHAIN SW 54843x-02 DIN Programming - Manual (Page 328)

328 DIN programming
4.23 C-axis commands
Standardize C axis G153
G153 resets a traverse angle >360° or <0° to the corresponding angle
modulo 360°—without moving the C axis.
G153 is only used for lateral-surface machining. An
automatic modulo 360° function is carried out on the face.