The 
icon generates an 'Error Logging List' from the station's flash.
The 'Export' button exports all listed entries into a .csv formatted file for further processing.
The severity of the error logging entries is categorized in different classes:
E | Error |
W | Warning |
I | Information |
U | Unconditional |
V | Event |
Click the top left corner of the table (see figure Filter the Error Logging List below) to filter the list (just show all items which are from the error logging station), and click the same place again to re-display all items.
NOTICE
The export feature always exports all visible items.