Alarms, faults and system messages
8.5 Faults, alarm buffer and alarm history
Converter with the control units CU240D-2
272
Operating Instructions, 04/2018, FW V4.9 SP10, A5E34262100B AF
8.5
Faults, alarm buffer and alarm history
Faults
Faults have the following properties:
●
In general, a fault leads to the motor being switched off.
●
A fault must be acknowledged.
●
Faults are displayed as follows:
–
Display in bit 3 of status word 1 (r0052)
–
Display on the operator panel with Fxxxxx
–
Display on the inverter via the LED RDY
–
Display in Startdrive or STARTER
Fault buffer
Figure 8-4
Fault buffer
The inverter saves incoming faults in the fault buffer. A fault includes a fault code, a fault
value, and two fault times:
●
Fault code: r0945
The fault code and fault value describe the cause of the fault.
●
Fault value: r0949 in fixed-point format "I32", r2133 in floating-point format "Float"
●
Fault time received = r2130 + r0948
●
Fault time removed = r2136 + r2109
The inverter takes its internal time calculation to save the fault times.
System runtime (Page 267)
Up to 8 faults can be saved in the fault buffer.
In the fault buffer, the faults are sorted according to "Fault time received". If the fault buffer is
completely filled and an additional fault occurs, then the inverter overwrites the values with
Index [7].
