Siemens SINAMICS V20 Operating Instructions Manual page 241

Parameter Function
r0947[0...63] CO: Last fault code
Displays fault history.
Index: [0]
...
[7]
[8]
...
[15]
[16]
...
[23]
...
[63]
Notice: It is possible that this parameter is empty but a fault is still indicated by the converter. The reason for this
is most likely due to a SAFE condition still existing in the system. In this situation the fault is cleared from
this parameter and it makes no sense to go back to a READY state. First remove the reason for the SAFE
condition and then the converter will be able to change to a READY state (SAFE condition example is
"safety function is activated").
Note: The function "converter status at fault" (Page 333) serves as a snapshot record in time of the relative
parameters being monitored at the point of a fault occurring. Some recorded parameters are filtered val-
ues. Therefore if a hardware trip occurs, (r0949 = 0), some filtered values may not appear to reflect those
values which caused the trip.
Example: If a hardware overvoltage trip occurs, (r0947 = 2 and r0949 = 0), the value of the filtered DC link voltage in
r0956 may appear to be under the trip limit. In this case, the filtered DC link value had not had enough
time to rise to the trip level; however, the actual limit had been exceeded and hence the hardware had
tripped to protect itself.
SINAMICS V20 Converter
Operating Instructions, 10/2019, A5E34559884-012
Range Factory
default
- -
Recent fault trip --, fault 1
...
Recent fault trip --, fault 8
Recent fault trip -1, fault 1
...
Recent fault trip -1, fault 8
Recent fault trip -2, fault 1
...
Recent fault trip -2, fault 8
...
Recent fault trip -7, fault 8
Can be Scaling Data
changed set
- - -
Parameter list
8.2 Parameter list
Data Acc.
type Level
U16 2
239