Siemens SINAMICS DCM Manual page 617

Descriptions of functions
10.33 Diagnostics
Alarm buffer, alarm history
The alarm buffer comprises the alarm code, the alarm value, and the alarm time (received,
resolved). The alarm history occupies the last indices ([8...63]) of the parameter.
Figure 10-103 Structure of alarm buffer
Alarms that occur are entered in the alarm buffer as follows:
A maximum of 64 alarms are displayed in the alarm buffer:
● Index 0 to 6: The first 7 alarms are displayed.
● Index 7: The most recent alarm is displayed.
A maximum of 56 alarms are displayed in the alarm history:
● Index 8: The most recent alarm is displayed.
● Index 9 to 63: The first 55 alarms are displayed.
Properties of the alarm buffer/alarm history:
● The alarms in the alarm buffer are arranged from 7 to 0 according to the time that they
occurred. In the alarm history, this is from 8 to 63.
● If 8 alarms have been entered in the alarm buffer, and a new alarm is received, the
alarms that have been resolved are transferred to the alarm history.
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Operating Instructions, 02.2015, A5E34763375/RS-AA/001
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