Siemens Sinamics s120 Commissioning Manual page 369

Properties of the fault buffer:
● A new fault incident encompasses one or more faults and is entered in "Current fault
incident".
● The entries are arranged in the buffer according to the time at which they occurred.
● If a new fault incident occurs, the fault buffer is reorganized. The history is recorded in
"Acknowledged fault incident" 1 to 7.
● If the cause of at least one fault in "Current fault incident" is remedied and acknowledged,
the fault buffer is reorganized. Faults that have not been remedied remain in "Current
fault incident".
● If "Current fault incident" contains eight faults and a new fault occurs, the fault in the
parameters in index 7 is overwritten by the new fault.
● 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
more accurately; please refer to the fault description for details of the meaning.
Clear fault buffer
● Delete fault buffer for all drive objects:
p2147 = 1 --> p2147 = 0 is automatically set after execution.
● Delete fault buffer for a specific drive object:
p0952 = 0 --> The parameter belongs to the specified drive object.
The fault buffer contents are automatically deleted for the following events:
● Restore factory setting (p0009 = 30 and p0976 = 1).
● Change drive object type
● Upgrade firmware to later version.
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Commissioning Manual, (IH1), 07/2016, 6SL3097-4AF00-0BP5
Diagnostics
4.5 Fault and alarm messages
369