HEIDENHAIN TNC 620 (73498x-02) ISO programming - Manual (Page 334)

Programming: Special functions
11.5 Freely definable tables
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TNC 620 | User's Manual for DIN/ISO Programming | 5/2013
D26: TAPOPEN: Open a freely definable table
With the function
D26: TABOPEN you open a freely definable table
to be written to with
D27 or to be read from with D28.
Only one table can be open in an NC program. A new
block with
TABOPEN automatically closes the last
opened table.
The table to be opened must have the file name
extension .TAB.
Example: Open the table TAB1.TAB, which is saved in the
directory TNC:\DIR1.
N56 D26: TABOPEN TNC:\DIR1\TAB1.TAB