HEIDENHAIN TNC 426 B User Manual page 42

Protecting and erasing programs in $MDI
The $MDI file is generally intended for short programs that are only
needed temporarily. Nevertheless, you can store a program, if
necessary, by proceeding as described below:
Select operating mode: Programming
and Editing
<
To call the file manager, press the PGM MGT
key (program management).
<
Move the highlight to the $MDI file.
<
Select „Copy file": Press the COPY soft key
Target file =
<
BOREHOLE
Enter the name under which you want to save
the current contents of the $MDI file.
<
Copy the file.
<
To close the file manager, press the END soft
key.
Erasing the contents of the $MDI file is done in a similar way:
Instead of copying the contents, however, you erase them with the
DELETE soft key. The next time you select the Positioning with MDI
operating mode, the TNC will display an empty $MDI file.
If you wish to delete $MDI, then
you must not have selected the Positioning with MDI
mode (not even in the background).
you must not have selected the $MDI file in the
Programming and Editing mode.
For further information, refer to section 4.2 "File Management. "
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3 Positioning with Manual Data Input (MDI)