HEIDENHAIN NC 124 - Manual (Page 67)

5 Programming
TNC 124 67
Entering program interruptions
You can divide a program into sections with stop marks. The TNC
then only executes the next block when you resume program run.
Operating mode: PROGRAMMING AND EDITING
Press STOP to insert a program interruption.
Go to the second soft-key row.
/
Resuming program run after an interruption
➤ Press the NC- I key.