Overwrite Citadel database

I want to overwrite contents of the citadel database.
In my application, the alarms are logged continuosly.
So is there a maximum limit for the database size.
Can i give a option, say after one month period overwrite the previous data.

Sorry for the confusion -- lifespanning applies only to data, not alarms as REM1 explained above.
Here's a VI which implements the SQL query to delete the Alarms from the MSDE database.
The attached .llb is saved in LabVIEW 7.0. Run the top-level VI (DeleteAlarms.vi). Enter the name (not the URL) of the database to be deleted, and the desired time range, and run the VI. NOTE: the time range is UTC time.
The VI makes use of the osql.exe command line tool, which is included with the MSDE installation, so it should not require any special setup. You also accomplish this manually by running:
osql -E -i C:\command.txt
Where command.txt contains the SQL command to delete the alarms.
Also attached is a 'Delete
combined.txt' file which contains an example query for deleting alarms from a database named "C__Documents_and_Settings_Adminstrator_Desktop_Dbs_OPCAlarms_data" in the time range (11/11/2003 11:31:00PM, 11/11/2003 11:46:00PM).
Hope this helps.
Regards,
Khalid
Attachments:
DeleteAlarms.llb ‏91 KB
Delete_combined.txt ‏2 KB

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How to import measurment data from a Excel File to Citadel DataBase?

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I give a example "Importing Spreadsheet Data to the Citadel Database" in the LabVIEW Version 6.1 and LV-DSC 6.1.
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I have an array of data which I want to directly put it in the Citadel Database. Normally the write tag VI writes one value at a time. How can this be done ?

It depends on what you really want. Could you be a little more specific? Does each point have its own separate timestamp? If so, you could simply put the "Write Tag.VI" inside a FOR LOOP and insert values one after another. This would give a separate timestamp to each value. I have attached a simple VI that shows how to do this.
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Attachments:
Write_array_to_citadel.vi ‏17 KB

Write to Citadel database from LabVIEW?

Hi. I'm a newbie when it comes to Lookout and the Citadel database... so here's my question for you all:
We have various labview applications that log data from instruments. We would like to be able to take this data and store it as "tags" in a Citadel database.
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There are ODBC drivers for the Citadel database, but they appear to only allow you to query the database to retrieve values... you can't write data to the database (so its read-only).
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Very nice question John Paul. I take it you already have Lookout and LabVIEW. In this case, with the latest versions of either, simply use the LabVIEW datasocket to publish the items on your front panel. Lookout then can subscribe to these once you register the LabVIEW computer. Once you have subscribed to them in Lookout, you are then able to set up logging. You may need to create an expression object to route the data to citadel.
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Good Luck,
Preston Johnson
Business Development Manager
Industrial Applications
National Instruments
Preston Johnson
Principal Sales Engineer
Condition Monitoring Systems
Vibration Analyst III - www.vibinst.org, www.mobiusinstitute.com
National Instruments
[email protected]
www.ni.com/mcm
www.ni.com/soundandvibration
www.ni.com/biganalogdata
512-683-5444

CITADEL DATABASE NOT CONFIGURED AS A RELATIONAL DATABASE

HI:
I have the same problem described by another member before, and I haven't found any resolution of this problem:
The problem was:
>I enabled database logging, and configured the shared variables that I wanted to log. Then I deployed the variables. When I try to read alarms and events (Alarm & Event Query.vi), I get this message:
>Error -1967386611 occurred at HIST_RunAlarmQueryCORE.vi,
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Please help me with this topic
Thanks in advance

I'm configuring the variables to be logged in the same way that appears on the file you send, but it doesn't work... I don't know what else to do.
I'm sending you the configuration image file, the error message image and a simple vi that creates the database; after, values are logged; I generate several values for the variable, values that are above the HI limit of the acceptance value (previously configured) so alarms are generated. When I push the button STOP, the system stops logging values to the database and performs a query to the alarms database, and the corresponding error is generated... (file attached)
The result: With the aid of MAXThe data is logged correctly on the DATA database (I can view the trace), but the alarm generated is not logged on the alarms database created programatically...
The same vi is used but creating another database manually with the aid of MAX and configuring the library to log the alarms to that database.... same result
I try this sabe conditions on three different PCs with the same result, and I try to reinstall LabVIEW (development and DSC) completelly (uff!) and still doesn't work... ¿what else can I do?
I'd appreciate very much your help.
Ignacio
Attachments:
error.jpg ‏56 KB
test_db.vi ‏38 KB
config.jpg ‏150 KB

Latency in accessing Citadel Database over the LAN

Hi!
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Attachments:
LAN Architecture.png ‏23 KB
Accessing database.png ‏14 KB

To enable external access without VPN, you must assign an external IP address and also map that external IP to the server. Additionally, you must open the associated ports (http) on the firewall (doesnt matter what firewall you use). You will have to map the extranal ip to the internal IP that you have set on the EBS server configuration. In some cases, you have to enable the proxy as well.

Archive citadel database in MAX hangs

I am trying to Archive a 4.13 GB uncompressed DSC database on LabVIEW 2013 SP1 (although the database was started with LabVIEW 2013). I have tried twice and it gets stuck (new location folder size is at 151 MB both times). The progress bar says "Archiving database=20.5%" and "Copying Data=83.0%". I have chosen the option "Destroy source data after it has been archived (local computer only)". The status says "copying data" and I no timestamps of files in the new folder have changed after about 9 hours of waiting. If I cancel, MAX cannot display any Citadel databases. This is fixed if i reboot.
Any ideas?

Hello barkeram,
Where are you storing the archive (locally or remote)?
Are you following the steps in one of the following documents?
http://digital.ni.com/public.nsf/allkb/E076A0661E03F1EB862571A800079E7B
http://digital.ni.com/public.nsf/allkb/2B0C74744BB37391862571F500067C64
Can you try to navigate to the file path of the database and duplicate the file? Afterward, manually add the new database to MAX and try to Archive the new file.
Regards,
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Applications Engineer
National Instruments

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We are running a new installation of Lookout 6.0
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We are running this on XP pro operating system.
Thanks,
Alan

Hi Alan,
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Can you give an example of the "bad" SQL statement and a good one?
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Hello All,
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Recover Citadel Database from Corrupt Hard Drvie

Hey All,
I recently suffered a hard drive failure / corrupted hard drive. However, I was able to recover several Citadel 5 database files from the corrupted drive. For example, I have 16 GB of CDPG files that I was able to recover. I might be able to recover other file types too, if I knew what I needed.
Is there anyway to recover these data and put them back in Citadel? Anway to view the data at all?
Thanks in advance for any advice / help!
Mike

Hi,
The link bellow shows the extension files used by Citadel databases. If you can perform a search by the extension of the file (*.thd) you will be able to recover your files.
http://digital.ni.com/public.nsf/allkb/A9A702342A4E332C86257807006D3D5D
Regards,
MCOTO

How do you change values after logging data to the citadel database (DSC)?

How would one go about changing values that already exist in the citadel database. So say I were logging a numeric value with a timestamp for 1 year and then wanted to change a few values for the month of June because my sensor wasn't working at that time. How could I do this? Is it possible without re-creating the whole database over?
Thanks
Matt

mattyk wrote:
Hey Ben,
Thanks for the quick response. I called NI and asked about this because this would be a big show stopper for me. Their applications engineer said that the best way to change previous data would be to read in the trace that you want to change, modify it and save it as a new trace. I am also looking into SQL querying. I was able to connect to the citadel database by setting up a ODBC data source and using the database connectivity toolkit to query the database. This worked. Now I am trying to come up with a statement in SQL to change previously saved data. I'll Keep you posted.
Thanks
Matt
That reinforces my suspicions.
I have an app running for about 8 years now that keeps a paper trail to enusr ethe cartdiges used in respirators (operated NIOSH National Institute of Occupational Safety and Health par teh CDC) that use DSC to enusre nobody can ever falsify those records. If they can be hacked I my customer and anyone using a respirator with a NIOSH sticker on the side of it, want to know.
Ben
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Citadel database to store constants?

can i use citadel database to store constants?
normally use citadel to store trends of any variable (and work fine), but if i need store a constant value, for example the result of a test (user name, erorr, etc...). i can do it using memory tags, but is a good practice? or maybe the best way to do is with other database and the connectivity toolset?
thanks for any answer!

I've used memory tags for stuff like this and I've also Flatten to String on clusters and saved this string to a file. Then read the file back into labview and use the Unflatten from String with a cluster constant to get the original data.

Logging large .ctl to citadel database is slow

Hi, All
I'm using LV 8.5 with DSC.
I'm logging my own.ctl types shared variables to citadel database. This own.ctl includes 52 piece doubles, strings and boolean datatypes. I have 200 piece this tape of shared variables and I record all that shared variable information to citadel database. All operations as writing, reading, achieving, and deleting database are very slow. They also consume lot CPU time. Is there any capacity limits on citadel database ? Which is best structure to record this kind of data to database? I have tested (see attacment) structure but it seems to be very slow because I have to delete and create database trace references after 1st database is full.
BR,
Attachments:
code_structure.jpg ‏51 KB

When you say "...to Log Data only when necessary... " I assume you are using Set Tag Attribute.vi to establish this behavior.
National Instruments recently added a feature (as a hot-fix) to the DSC Engine to be able to ignore timestamps coming from servers to prevent to log values with "back-in-time" timestamps. Citadel is really critical taking values back in time (logs a ) and therefore retrieval of Citadel data with such back-in-time traces could act wired.
You can find more info from:
Why Do I See a Lot of NaN (Not-a-Number) In My Citadel Database When I Use the Set Tag Attribute.vi?
blic.nsf/websearch/B871D05A1A4742FA86256C70006BBE00?OpenDocument>How Do I Avoid Out-of-Synch (a.k.a....
The Hot-Fix can be found:
LabVIEW Datalogging and Supervisory Control Module Version 6.1 for Windows 2000/95/98/ME/NT/XP -- Fi...
I assume you run into such a use case - maybe. It happen to me, too . And I've created a small VI which would analyze traces on back-in-time (NaN - Not a number) values. I assume the missing Data in DIAdem are those Not-a-Numbers aka Break.
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Hope this helps
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Attachments:
BackInTimeAnalyzer.llb ‏622 KB

Editing tag values logged in tag history / citadel database

Hi,
I having been logging data from input/output tags and memory tags to my citadel database over the past week and due to some errors in my vi (my fault) some values are showing on my trends that are incorrect. These values are affecting my calculations (e.g. zeros, infinite numbers etc) and I would really like to delete them if possible.
Does anyone know a way of going in to the database/tag history and selecting and deleting values whilst still leaving other data in tact?
Many thanks,
Stuart

You can remove the data from a Citadel database using LabVIEW, Lookout or Measurement and Automation Explorer (MAX). This is a two step process:
First you archive the data that you want to delete. When archiving, choose to delete this data from the original database. The archiving operation will move the data from your database to new database.
The second step is to delete the new archived database. This removes the extra database that was created by the archive operation. Once the data has been archived you can remove the archived data by either deleting the database manually or by using file VIs from LabVIEW.
The document elaborates this process for MAX, LabVIEW and Lookout separately
Measurement and Automation Explorer (MAX) You must have Historical Data Viewer installed. It comes with Lookout 5.0 and LabVIEW DSC 6.1.
To remove the historical data in MAX, follow these steps:
Under the Historical Data folder in MAX, select the database that you want to remove data from.
Right-click the database and select New View»Trace. This creates a trace view with the default name of New View under the database folder.
On the Trace Attributes page, click on Add new traces. Select the traces you want to archive.
Select a starting and stopping time.
Right-click New View and select Archive.
Enter a directory path to store the archived data.
Check the Delete data from source database checkbox to delete the data from the source database.
Click Start.
Once it is complete, click Close.

Overwrite Citadel database

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