Diagnostics
5.3 Fault and alarm messages
Function Manual
Function Manual, 01/2011, 6SL3097-4AB10-0BP3
109
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.
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Figure 5-13 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 ... 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.
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.
In the alarm history, this is from 8 to 63.
● If 8 alarms have been entered into the alarm buffer, and a new alarm is received, then the
alarms that have been resolved are transferred into the alarm history.
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