Buffer For Faults And Alarms - Siemens SINAMICS S120 Commissioning Manual

Diagnostics
3.5 Fault and alarm messages
3.5.2

Buffer for faults and alarms

Note
A fault and alarm buffer is provided for each drive. The drive and device-specific messages
are entered in these buffers.
The contents of the fault buffer are saved to non-volatile memory when the Control Unit is
powered down, i.e. the fault buffer history is still available when the unit is powered up again.
Note
The entry in the fault/alarm buffer is made after a delay. For this reason, the fault/alarm
buffer should not be read until a change in the buffer is also recognized (r0944, r2121) after
"Fault active"/"Alarm active" is output.
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Commissioning Manual, (IH1), 01/2013, 6SL3097-4AF00-0BP3
Commissioning Manual