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9.4
Alarms, alarm buffer, and alarm history
Overview
An alarm generally indicates that the converter may no longer be able to maintain the operation
of the motor in future.
The extended diagnostics have an alarm buffer and an alarm history, in which the converter
stores the most recent alarms.
Function description
Alarms have the following properties:
● Incoming alarms have no direct influence on the converter.
● A warning disappears as soon as its cause is eliminated.
● Alarms do not have to be acknowledged.
● Alarms are displayed as follows:
– Display via the fieldbus
– Display on the operator panel with Axxxxx
– Display via SINAMICS G120 Smart Access
Alarm code or alarm value describe the cause of the alarm.
Alarm buffer
Figure 9-1
The converter 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 converter takes its internal time calculation to save the alarm times.
Up to 8 alarms can be saved in the alarm buffer.
SINAMICS G120XA converter
Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB
Alarm buffer
System runtime (Page 746)
Warnings, faults and system messages
9.4 Alarms, alarm buffer, and alarm history
747
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