Siemens Sinamics S120 Comissioning Manual page 177

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.
Fault buffer
Faults which occur are entered in the fault buffer as follows:
Figure 5-12 Structure of the fault buffer
Commissioning with Startdrive
Commissioning Manual, (IH3), 07/2016, 6SL3097-4AA10-0BP0
Diagnostics
5.4 Fault and alarm messages
177