Siemens Sinamics G120P Operating Instructions Manual page 442

Alarms, faults and system messages
9.4 Faults
Emptying the fault buffer: Fault history
The fault history can contain up to 56 faults.
The acknowledgement has no effect as long as none of the causes for the faults in the buffer
have been removed. If at least one of the faults in the fault buffer has been removed (the
cause of the fault has been removed) and you acknowledge the faults, then the following
happens:
1. The inverter accepts all faults from the fault buffer in the first eight memory locations of
the fault history (indexes 8 ... 15).
2. The inverter deletes the faults that have been removed from the fault buffer.
3. The inverter writes the time of acknowledgement of the faults that have been removed
into parameters r2136 and r2109 (fault time removed).
Figure 9-8
After acknowledgement, the faults that have not been removed are located in the fault buffer
as well as in the fault history. For these faults, the "fault time coming" remains unchanged
and the "fault time removed" remains empty.
If less than eight faults were shifted or copied into the fault history, the memory locations with
the higher indexes remain empty.
The inverter shifts the values previously saved in the fault history by eight indexes. Faults,
which were saved in indexes 56 ... 63 before the acknowledgement, are deleted.
Deleting the fault history
If you wish to delete all faults from the fault history, set parameter p0952 to zero.
442
Fault history after acknowledging the faults
Inverter cabinet units
Operating Instructions, 12/2014, A5E32923362A