Siemens SINAMICS S120 Commissioning Manual page 230

Diagnostics
3.5 Fault and alarm messages
● r0944 is incremented each time the fault buffer changes.
● A fault value (r0949) can be output for a fault. The fault value is used to diagnose the fault
Clearing the fault buffer
● The fault buffer is reset as follows: p0952 = 0
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 3-13
Alarms that occur are entered in the alarm buffer as follows:
A maximum of 64 alarms are displayed in the alarm buffer:
● Index 0 .. 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 .. 63: The first 55 alarms are displayed.
228
more accurately; please refer to the fault description for details of the meaning.
Structure of alarm buffer
Commissioning Manual, (IH1), 01/2011, 6SL3097-4AF00-0BP1
Commissioning Manual