7 – 6 HEIDENHAIN Technical Manual TNC 426, TNC 430 
7.1.3 File Management
File management in PLC mode is largely the same as in the Programming and 
Editing mode of operation (see User's Manual for TNC 426/TNC 430). If in PLC 
mode you press the PGM MGT key, the TNC displays the TNC partition as well 
as the PLC partitions at the upper left of the screen.
Differences from 
file management of 
NC part programs 
The following are file types displayed by the TNC when you press the FILE 
TYPE soft key:
With the MORE FUNCTIONS soft key you select the following functions:
Soft key Function
Show all files.
Show only PLC programs (*.PLC).
Show only ASCII files (*.A).
Show only help files (*.HLP).
Show only system files (*.SYS).
Show only compensation value tables (*.COM).
Show only tables with compensation value assignments 
(*.CMA).
Show only tables with PLC error messages (*.PET).
Back to previous menu.
Soft key Function
Generates a list of cross references. You cannot use a file 
name extension already used by the TNC (. PLC, .CMA etc.).
Generates a list of programs, numbered by line.
Generates a program list and cross reference list, numbered 
by line.