Siemens SINAMICS S120 Commissioning Manual page 143

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 seven 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 .. 56: The first 55 alarms are displayed.
Properties of the alarm buffer/alarm history:
● The arrangement in the alarm buffer is made after the time that they occurred from 7 to 0.
● If 8 alarms have been entered into the alarm buffer, and a new alarm is received, then the
● r2121 is incremented each time the alarm buffer changes.
● An alarm value (r2124) can be output for an alarm. The alarm value is used to diagnose
Deleting the alarm buffer, index [0...7]:
● The alarm buffer index [0...7] is reset as follows: p2111 = 0
Commissioning
Commissioning Manual, (IH1), 07/2007 Edition, 6SL3097-2AF00-0BP7
Structure of alarm buffer
In the alarm history, this is from 8 to 56.
alarms that have been resolved are transferred into the alarm history.
the alarm more accurately; please refer to the alarm description for details of the
meaning.
Diagnosis
3.3 Fault and alarm messages
143