HEIDENHAIN TNC 426 PB - 3.1 Programming and Executing Simple Machining Operations

2 – 30 HEIDENHAIN Technical Manual TNC 426, TNC 430
2.5 Software
2.5.1 Designation of the Software
The logic unit features a separate software for the NC and the PLC. The NC
software is identified with an eight-digit number. The ID number is displayed
briefly after the TNC is switched on:
If you press the MOD key in any operating mode, you can display the ID
numbers of the NC software, the DSP software and the setup disks. If the
hardware contains flash EPROMs, the letter “F” is displayed before the NC
software Id. Nr.