Descriptions of functions
10.34 Diagnostics
SINAMICS DCM DC Converter
654 Operating Instructions, 12/2018, A5E34763375A
Properties of the alarm buffer/alarm history:
● The alarms in the alarm buffer are arranged from 7 to 0 according to the time that they
occurred. In the alarm history, this is from 8 to 63.
● If 8 alarms have been entered in the alarm buffer, and a new alarm is received, the
alarms that have been resolved are transferred to the alarm history.
● r2121 is incremented each time the alarm buffer changes.
● An alarm value (r2124) can be output for an alarm. The alarm value is used to diagnose
the alarm more accurately; please refer to the alarm description for details of the
meaning.
Clearing the alarm buffer, index [0...7]:
● The alarm buffer index [0...7] is reset as follows: p2111 = 0
The properties of the faults and alarms in the drive system are permanently defined.
The following configuration settings can be made for some of the messages within a
permanently defined framework for the drive system:
Change message type (example)
Change fault response (example)
Change acknowledgment (example)