Alarms, faults and system messages
9.4 Faults
Inverter with CU240B-2 and CU240E-2 Control Units
254 Operating Instructions, 07/2010, FW 4.3.2, A5E02299792B AA
Parameters of the fault buffer and the fault history
Table 9- 9 Important parameters for faults
Parameter Description
r0945 Fault code
Displays the numbers of faults that have occurred
r0948 Fault time received in milliseconds
Displays the time in milliseconds when the fault occurred
r0949 Fault value
Displays additional information about the fault
p0952 Fault cases, counter
Number of fault cases that have occurred since the last acknowledgement
The fault buffer is deleted with p0952 = 0.
r2109 Fault time removed in milliseconds
Displays the time in milliseconds when the fault occurred
r2130 Fault time received in days
Displays the time in days when the fault occurred
r2131 Actual fault code
Displays the code of the oldest fault that is still active
r2133 Fault value for float values
Displays additional information about the fault that occurred for float values
r2136 Fault time removed in days
Displays the time in days when the fault was removed
The motor cannot be switched-on
If the motor cannot be switched-on, then check the following:
● Is a fault present?
If yes, then remove the fault cause and acknowledge the fault
● Does p0010 = 0?
If not, the inverter is e.g. still in a commissioning state.
● Is the inverter reporting the "ready to start" status (r0052.0 = 1)?
● Is the inverter missing enabling (r0046)?
● Are the command and setpoint sources for the inverter (p0700 and p1000) correctly
parameterized?
In other words, where is the inverter getting its speed setpoint and commands from
(fieldbus or analog input)?
● Do the motor and inverter match?
Compare the data on the motor's nameplate with the corresponding parameters in the
inverter (P0300 ff).
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