ABB S900 - Error Codes; CI920 and I;O Module Error Codes

I/O System S900
Communication Interface for PROFIBUS DP, CI920
42 3BDD010422R0101
The error codes of the CI920 have the following meaning:
16: ROM Error
17: RAM Error
18: EEPROM Error
19..21: reserved
22: no CAN communication
23: no redundant CAN communication
24: error of power supply 1
25: error of power supply 2
26: restart upon watchdog reset (message indicated for 10 seconds)
27: redundancy toggle has occurred (message indicated for 10 seconds)
28: redundant CI920 is missing
29: redundant CI920 is not ready
30: redundant CI920 is defective
31: no DP communication with CI920
Error Codes (I/O modules)
The error codes of the I/O modules have the following meaning:
19: unknown module type (set configuration)
20: unknown module type (actual configuration)
21: reserved
22: implausible (inconsistent) parameters
23..29: reserved
30: HART status error
31: HART error