Siemens SIMATIC IPC427C - Replacement of the Compactflash Card for the Embedded PC; Backup Battery

Restoring and maintenance
5.3 Notes
SIMATIC IPC427C Bundles, SIMATIC HMI IPC477C Bundles
44 Manual, 07/2009, A5E02280126-02
5.3.3 Replacement of the CompactFlash card for the Embedded PC
Procedure
If you have configured the WinAC data storage on a SIMATIC Embedded Bundle,
to be NVRAM, and you need to replace the CompactFlash card, follow these steps:
1. Replace the CompactFlash card in the SIMATIC Embedded Bundle.
2. Perform a memory reset (MRES) after you restart WinAC RTX.
3. Reload the STEP 7 user program and configuration.
5.3.4 Backup battery
Backup battery replacement
If you use the NVRAM of a SIMATIC Embedded Bundle for retentive data storage, change
the backup battery at least every five years. If the system clock is slowing down, this
indicates that the backup battery is failing.