Alarms, faults and system messages
8.4 Alarms, alarm buffer, and alarm history
Converter with the control units CU240D-2
Operating Instructions, 04/2018, FW V4.9 SP10, A5E34262100B AF
269
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Alarms do not have to be acknowledged.
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Alarms are displayed as follows:
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Display via bit 7 in status word 1 (r0052)
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Display on the operator panel with Axxxxx
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Display in Startdrive or STARTER
Alarm code or alarm value describe the cause of the alarm.
Alarm buffer
Figure 8-2
Alarm buffer
The inverter saves incoming alarms in the alarm buffer. An alarm includes an alarm code, an
alarm value, and two alarm times:
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Alarm code: r2122
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Alarm value: r2124 in fixed-point format "I32", r2134 in floating-point format "Float"
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Alarm time received = r2145 + r2123
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Alarm time removed = r2146 + r2125
The inverter takes its internal time calculation to save the alarm times.
System runtime (Page 267)
Up to 8 alarms can be saved in the alarm buffer.
In the alarm buffer, the warnings are sorted according to "Warning time received". If the
alarm buffer is completely filled and an additional alarm occurs, then the inverter overwrites
the values with Index [7].