In LabVIEW DSC, there is the Alarm Summary Display Listbox, which will allow you to view information about historical alarms. This listbox will show you the Date, Time and Tag name for each alarm that is generated. I would recommended that you take a look at a shipping example called "Alarms and Events Viewing Options" which shows an example of using this Listbox. This should work in your occasion.
Hope this helps.
Patrick R.