Siemens CU240B-2 Operating Instructions

8.4 Alarms, alarm buffer, and alarm history
Alarms
Alarms have the following properties:
● Incoming alarms have no direct influence on the inverter.
● Alarms disappear again when the cause is eliminated.
● Alarms do not have to be acknowledged.
● Alarms are displayed as follows:
– Display via bit 7 in status word 1 (r0052)
– Display on the operator panel with Axxxxx
– Display in Startdrive or STARTER
Alarm code or alarm value describe the cause of the alarm.
Alarm buffer
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Figure 8-1 Alarm buffer
The inverter saves incoming alarms in the alarm buffer. An alarm includes an alarm code, an
alarm value, and two alarm times:
● Alarm code: r2122
● Alarm value: r2124 in fixed-point format "I32", r2134 in floating-point format "Float"
● Alarm time received = r2145 + r2123
● Alarm time removed = r2146 + r2125
The inverter takes its internal time calculation to save the alarm times.
Real time clock (RTC) (Page 293)
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].
Alarms, faults and system messages
8.4 Alarms, alarm buffer, and alarm history
Converter with the CU230P-2 Control Units
400 Operating Instructions, 09/2017, FW V4.7 SP9, A5E34257946B AE

Siemens CU240B-2 Specifications

General

Brand	Siemens
Model	CU240B-2
Category	Inverter
Language	English