ABB AC 900F Mounting And Installation Instructions Manual page 120

Update/Restore
F2 - Firmware update
The controller searches a valid firmware file on the SD card and loads it into the
flash memory of the CPU module. Upon restoring or updating, the controller is
automatically rebooted. Depending on the file size, this process can take several
seconds (loading..... is displayed). As soon as the ABB logo appears, you can
remove the SD card from the slot.
Make sure that the SD card is not removed and the power supply is not switched
off during firmware updating!
F3 - Enable autorestore
The controller can be configured to automatically restore the configuration data
saved on the SD card (Backup config) when a cold start is initiated.
The Autorestore function can only be properly performed on condition that the SD
card with the configuration remains installed. The controller features a monitoring
function to check whether this is the case. This monitoring function can be activated
using the AC 900F parameter dialog in Freelance Engineering, only:
CPU/Security > SD card > SD card monitoring
If the SD card is removed while the monitoring function is activated, the controller
displays a "SD card removed" message. This message appears in the Freelance
Operations message list.
In the Freelance Engineering Commissioning mode the AC 900F parameter dialog
shows the following:
[...] SD card available: [ ] = no card, [v]= card available
As to the use of the Autorestore function, please observe the following information.
CPU module with battery
In the case of a cold start and an empty memory, the data will be automatically
transferred from the memory card to the controller memory. If the controller already
contains data, the data from the memory card will not be stored.
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Section 8 Service
M&I – AC 900F Controller