Heidenhain 407 - what do I need to backup ?

[Maws]

If the battery backup for some reason should fail on the 407 and I loose the settings for the machine, that files do I need to backup to be able to recover the machine ?.


I'v backed up 2 files (not thinking about the drawings etc) - actually 3 files, but I think 2 of them is the same.

Namely:

9000.PLC
02001.PLC

and
02900.MP

Is there any other "system" files needed to get the machine running again ?.