HEIDENHAIN TNC 406 - Manual (Page 264)

HEIDENHAIN TNC 406, TNC 416 243
12.8 Code Number
12.8 Code Number
Function
If you want to change the user parameters, you must first enter the
code number 123 (see ”General User Parameters” on page 246).
Enter the code number after selecting the corresponding MOD
function in the dialog field. The TNC displays one asterisk for each digit
you enter.