Diagnostics - Notifications

Available from firmware 2020.3 


This WBM page is accessible with user role:

  • Admin
  • SecurityAdmin (from firmware 2022.0 LTS)
  • SecurityAuditor (from firmware 2022.0 LTS)
  • CertificateManager
  • UserManager
  • Engineer
  • Commissioner
  • Service
  • DataViewer
  • DataChanger
  • Viewer

How to get into the WBMHow to get into the WBM

Establishing a connection to the Web-based Management (WBM):

  • Open a web browser on your computer.
  • In the address field, enter the URL https://<IP-address-of-the-controller>/wbm,
    for example:

For further information, see WBM.

Notifications page

On the Notifications page, you can read and download notification logs. Any user with access rights to the WBM can view and download the information on the page.  

For more information, see Notification Logger

Notifications page

The page consists of notification filter options, buttons for applying filters and exporting notifications in CSV format as well as an overview table of all notifications and a full text display for selected notifications. 

Note: From firmware release 2021.6, the time format is changed to HH:mm:ss, meaning the 24 hrs format.

Notifications filter

You can filter notifications according to the following criteria. 

To activate the filter settings, click on the Apply Filter button. The notifications table is then updated accordingly.

Archive name

You can filter notifications by their archive name. You have the following setting options:

  • All: To receive notifications from every archive
  • Archive name: To receive notifications of a specific archive (The archives default and security are available by default)

From firmware version 2023.6 alarm notifications (Arp.Services.Alarms.Log.*) are logged into a separate archive alarms  (file: /opt/plcnext/projects/Default/Services/NotificationLogger/alarms.config).


You can filter notifications by their severity level. Higher levels are included when filtered by a lower level, meaning:

  • Filtering on Default (or Internal) displays all notifications because all other security levels are higher.
  • Filtering on Information displays notifications from severity levels  
    • Information 
    • Warning 
    • Error
    • Critical
    • Fatal
  • Filtering on Warning displays notifications from severity levels 
    • Warning 
    • Error
    • Critical
    • Fatal
  • Filtering on Error displays notifications from severity levels
    • Error
    • Critical
    • Fatal
  • Filtering on Critical displays notifications from severity levels
    • Critical
    • Fatal
  • Filtering on Fatal displays notifications only from severity level Fatal because all other security levels are lower.


You can filter notifications by their sender name.
Note: The notifications selected by the filter form the basis for the Sender drop down menu. At least the filter Maximum number of notifications is always activated. Only the sender names of the notifications listed in the table are displayed in the Sender drop down menu.
You have the following options:

  • Select a sender name from the drop down menu. The listed sender names correspond to the names in the notifications table. 
  • Enter a sender name or part of a sender name in the input field. Use this option if the sender name has not yet been listed in the notifications table.
    Filtering displays notifications from senders that match or partially match the search term you entered.

Maximum number of notifications

Enter the maximum number of notifications to be displayed.

The maximum number must not exceed 4000 (Default setting = 1024).

Time from and Time to

You can limit the time period for which notifications are displayed by filling in the input fields Time from and Time to:

  • Time from: Notifications that are not older than the specified time or date are displayed.
  • Time to: Notifications that are not more recent than the specified time or date are displayed.

The entry of the date is mandatory and may be supplemented by a time. 


Notifications table

Severity levels

The severity of each notification is displayed by icons, meaning:

  • Internal (or Default)
  • Information
  • Warning
  • Error
  • Critical
  • Fatal

Sort criteria for notifications table

By default, the notifications in the notifications table are sorted in descending order based on the time stamp. You have the option of using the individual columns of the notifications table as sort criteria.

To sort the notifications, click on the header of the corresponding table column:

  • Severity or Time (timestamps) are sorted in ascending/descending order.
  • Sender (sender names) or Name (notification names) are alphabetically sorted in ascending/descending order.

The arrows at the column headers have the following meaning:

  • Double arrow: The table is not sorted by this column.
  • One arrow pointing up: The table is sorted by this column in ascending order.
  • One arrow down: The table is sorted by this column in descending order.

CSV file download

The listed notifications can be exported in CSV format.

  • Click on the Export CSV button. and select a location for the CSV file.

Payload display

The text field displays the full text/payload of a selected notification from the notification table. The text field is empty if no notification is selected.

notification full text

Update of the notifications table

The notification table is updated every second when a connection is established. 



• Published/reviewed: 2024-05-06   ★  Revision 068 •