HEIDENHAIN TNC 426B (280 472) ISO programming - Manual (Page 303)

11 Test Run and Program Run 288
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Resuming program run after an interruption
If a program run is interrupted during a fixed cycle, the
program must be resumed from the beginning of the
cycle. This means that some machining operations will
be repeated.
If you interrupted program run during a program section
repeat, you can only use GOTO to select other blocks
within the program section repeat.
If you interrupt a program run during execution of a subprogram or
program section repeat, use the RESTORE POS AT N function to
return to the position at which the program run was interrupted.
When a program run is interrupted, the TNC stores:
■ The data of the last defined tool
■ Active coordinate transformations
■ The coordinates of the circle center that was last defined
The stored data are used for returning the tool to the contour after
manual machine axis positioning during an interruption (RESTORE
POSITION).
Resuming program run with the START button
You can resume program run by pressing the machine START
button if the program was interrupted in one of the following ways:
■ The machine STOP button was pressed
■ A programmed interruption
Resuming program run after an error
■ If the error message is not blinking
ú Remove the cause of the error.
ú To clear the error message from the screen, press the CE key.
ú Restart the program, or resume program run at the place at which
it was interrupted.
■ If the error message is blinking
ú Press and hold the END key for two seconds. This induces a TNC
system restart.
ú Remove the cause of the error.
ú Start again.
If you cannot correct the error, write down the error message and
contact your repair service agency.
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