HEIDENHAIN iTNC 530 (340 49x-05) - Manual (Page 654)

654 iTNC 530 with Windows XP (Option)
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Shutting down Windows
If you try to shut down Windows while the iTNC software is still active,
the control displays a warning (see figure).
If you confirm with OK, the iTNC software is exited and Windows is
shut down.
Caution: Danger to the machine and workpiece!
Before you confirm with OK, you absolutely must press
the Emergency Stop button. Otherwise you could lose
data or the machine could become damaged.
Caution: Danger to the machine and workpiece!
After several seconds Windows displays its own warning,
covering the iTNC warning (see figure). Never confirm the
warning with End Now, since you could lose data or the
machine could become damaged.