ABB S800 I/O Manual page 90

Load the CI840 Software Upgrade
10. Disconnect power to CI840 and connect the power again, for start up of CI840.
Loading the Firmware on Backup FCI when the Primary FCI is Running
CI840 with firmware 3.0/2 or earlier
11. Follow the instructions as for Single FCI, until Step 5.
12. Disconnect the power supply from the backup FCI by unlocking the screw,
13. Continue the procedure according to Single FCI from Step 7 without any
14. If the downloading does not start, repeat Step 12 and Step 13.
15. When the download is finished, the CI840 starts up automatically.
CI840 with firmware 3.1/0 or later.
16. Follow the instructions according to Single FCI until Step 5.
17. Disconnect the power supply from the backup FCI by unlocking the screw and
18. Click Download.
19. If the downloading does not start, repeat Step 17 and Step 18.
20. When the download is finished, the CI840 starts up automatically.
Loading the firmware in the Primary FCI when the Backup is Running
21. Do a change over, so that the FCI that should be updated is in backup state.
22. Load the firmware as in the topic Backup FCI when the Primary FCI is
90
The red F(ault) LED lights up.
wait for 20 seconds, and lock it again.
waiting.
The red F(ault) LED lights up.
locking it again.
This can be done by the DTM or by disconnecting the PROFIBUS cable on the
primary.
running.
Section 5 Maintenance
3BSE020926-600