Endress+Hauser Liquiphant FTL31 IO-Link Operating Instructions Manual page 35

Liquiphant FTL31 IO-Link
Diagnostic event and event text
The fault can be identified using the diagnostic event.
Example
If two or more diagnostic events are pending simultaneously, only the diagnostic message
with the highest priority is shown.
The last diagnostic message is displayed: Diagnosis submenu → Last Diagnostic (LST)
parameter.
Endress+Hauser
Diagnostic event
Status signal
↓
A0013959
Diagnostics and troubleshooting
Event number
↓
469
35