Siemens SINAMICS G120D Operating Instructions Manual page 288

Alarms, faults and system messages
9.1 Alarms
If an additional alarm is received, then this is also saved. The first alarm is still saved. The
alarms that have occurred are counted in p2111.
Image 9-2
The alarm buffer can contain up to eight alarms. If an additional alarm is received after the
eighth alarm - and none of the last eight alarms have been removed - then the next to last
alarm is overwritten.
Image 9-3
Emptying the alarm buffer: Alarm history
The alarm history traces up to 56 alarms.
The alarm history only takes alarms that have been removed from the alarm buffer. If the
alarm buffer is completely filled - and an additional alarm occurs - then the inverter shifts all
alarms that have been removed from the alarm buffer into the alarm history. In the alarm
history, alarms are also sorted according to the "alarm time received", however, when
compared to the alarm buffer, in the inverse sequence:
● The youngest alarm is in index 8
● The second youngest alarm is in index 9
● etc.
288
Saving the second alarm in the alarm buffer
Complete alarm buffer
Operating Instructions, 07/2016, FW V4.7 SP6, A5E34262100B AD
Converter with control units CU240D-2