Can I log the Alarms & Events in Citadel?

Platform - LabVIEW DSC 6.1
OS - WinNT 4.0 SP 6.0
Hardware - NONE
By using "HIST Alarm & Event Query.vi" I can view the Alarms and events occured over a span of time. The data can be retrived even when the DSC Engine is shutdown but if I re-start my PC the Alarm & Event data is lost though the file "Ale00000.ale" which logs the Alarms & Events is there. Can you tell me what the problem is ? Is there a method of logging the Alarm & Event data automatically in the Citadel like the logging of the tag values ?

Somehow nobody replied to you. Maybe this is because we do not exactly understand what you describe.
Just in general : LabVIEW DSC 6.1/7 logs all the values/data and all the alarms and events through the Tag Engine (DSCEngine). Therefore, you need to do everything through tags. I can imagine that you configure a discrete tag with a certain alarm configuration. Once you set this tag to high it will generate an alarm. The unfortunate thing is that you can not specify a unique customized HIHI/HI/LO/LOLO message.
The behavior you descirbe with the "life-time" of alarms is wired. Either you ran an older version of Logos which might had - a long time ago - an issue with some 'zero-files' or you mix up the historical alarms with the current, live alarms. The LabVIEW
DSC Engine could keep some alarms and shows them up in the alarm summery as long a the engine is running (live-alarms) once you shut down the engine the alarm summery will not show those alarms anymore. However, when you query the historical alarms you should get those alarms back from the database (regardless if the engine is running or not)
In LabVIEW DSC 7.0 National Instruments distinguishs between historical alarms and life alarms much better by having a "DSC Engine-internal" alarm server implemented. The Citadel Service is monitoring this alarm server and once it gets a new alarm it will put it to a relational database (MS SQL Server/MSDE).
This new change sounds quite promising for the new feature set of LabVIEW DSC 7.
Hope this helps
Roland
PS: ftp://ftp.ni.com/support/lookout/logos - Where you can get the latest logos 4.4 version for LV DSC 6.1.

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