Siemens SINAMICS S120 Commissioning Manual page 338

Diagnostics
6.3 Fault and alarm messages
Properties of the fault buffer
The fault buffer has the following characteristics:
• 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
To delete the fault buffer, proceed as follows:
• Deleting the fault buffer for all drive objects:
p2147 = 1 → p2147 = 0 is automatically set after execution.
• Deleting the 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).
• Changing the drive object type.
• Upgrade firmware to later version.
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Commissioning with Startdrive
Commissioning Manual, 06/2020, 6SL3097-5AA10-0BP2