HEIDENHAIN TNC 407 (243 020) Service Manual - Manual (Page 109)

D-83292 31-c
SERVICE MANUAL TNC
Issue:
01.09.1995
Page 90
Backing up RAM Data
Before the complete logic unit or the processor board is exchanged all files in the RAM must be backed up
on at- external data medium.
The machine parameters and the part programs are always processed from the RAM and must be stored
on an external data medium.
In the machine parameter MP7224 individual file types can be enabled:
e.g. tool tables, datum tables, pallet tables, ASCII files.
If all files or individual files are enabled, they need to be stored on an external data medium.
If the value of the machine parameter MP4010 is 1, the PLC program parts are processed from the RAM
and must be backed up.
If the machine parameter MP730 is not 0, the multipoint axis error compensation is active for one or several
axes. In this case, the compensation value list must be backed up as well.
Note:
For reasons of safety, the machine parameters, the compensation value list (if active) and the PLC program
(if should always be backed up on an external data medium. The procedure for data backup
is described in section 15.3. Data backup is not required, if the data are already stored on an external data
medium.