HEIDENHAIN TNC 410 ISO Programming - Manual (Page 163)

HEIDENHAIN TNC 410, TNC 426, TNC 430 137
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N170 G01 X+5 * Move to last contour point 1
N180 G27 R5 F500 * Depart the contour on a circular arc with tangential connection
N190 G40 X-20 Y-20 F1000 * Retract tool in the working plane, cancel radius compensation
N200 G00 Z+250 M2 * Retract tool in the tool axis, end of program
N999999 %CIRCULAR G71 *