Power-Up; Sram Handling - Siemens SINUMERIK 840Di sl Commissioning Manual

5.3

Power-up

5.3.1

SRAM handling

The user data of the NC (machine data, setting data, user variables, part programs, cycles,
etc.), as well as the retentive data of the PLC are battery-backed in the static memory area
(SRAM) of the MCI board.
With each "NCK power ON RESET" (warm restart) or shutting down Windows XP correctly,
the contents of the SRAM is saved to the hard disk of the PCU as an SRAM image. In this
case, the SRAM image valid until then is also saved to the hard disk of the PCU as an
SRAM backup.
In certain error or servicing instances, the SRAM image or backup can be accessed so that
work can be continued immediately without recommissioning the SINUMERIK 840Di sl.
Table 5-1
HW
serial
number
MCI board
Known
Known
Known
Known
Unknown
Unknown
(SW
update)
Unknown
Unknown
Manual
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
SRAM handling
SRAM SRAM image
MCI (hard disk)
board
"OK"
"OK"
yes Not
applicable
No yes
No No
No No
yes yes
yes Not
applicable
yes No
yes No
SRAM backup Used user data/
(hard disk)
"OK"
Normal power-up
Not applicable MCI/
no message box or alarms;
Not applicable IMAGE/
See Section "Power-up after changing the
MCI boards"; case 1
yes BACKUP/
See Section "Power-up after changing the
MCI boards"; case 2
No Commissioning/
Not applicable MCI or IMAGE/
See section "Startup after replacement of
the PCU or the MCI board"
MessageBox;
Not applicable MCI/
See section "Power up after
reinstallation/update of the 840Di sl
software"
yes MCI or BACKUP/
BACKUP is selected, message box and
alarm will occur;
See Section "Power-up after changing the
MCI boards"; case 2
MessageBox;
No MCI/
See section "Power up after
reinstallation/update of the 840Di sl
software"
Power-On and Power-Up
5.3 Power-up
remark
message box and alarm;
recommissioning required
Request carried out;
Request carried out; if
127