tdm time slice

[cova]

I have several tdm files (around 4GB) and I want to be able to view (using DIAdem or LabVIEW) only certain parts of the data, basicaly time slice certain parts. I would like to be able to say for example, I want to see the data from 10/06/2006 10:25:10.0000 to 10/06/2006 10:35:10:1100. However, I can't find a way to do that, the diadem search doesn't find the values. Could somebody help?

[K_Bull]

Hi,
How big is your single .tdm file? What version of DIAdem are you using? How many channels are there and do you need all these channels to be viewed in the time space that you are after or is it only some of the channels?
One of the ways of doing that would be to make another .tdm file with the time period you are interested in. But obviously, it can be very tideous to do this and you will be handling more files than you perhaps would like to.
Regards,

Message Edited by Kabul on 01-10-2008 05:02 PM

[K_Bull]

Take a look at this tutorial Introduction to LabVIEW Data Storage VIs.
Hope this helps.

[cova]

The file is 40G. I have 32 channels + time, the length of each channel is 60009462 points. I am using Diadem 10.2

Because the file is so long I can't load it, so I would like to divide the file into smaller files based on the timestamp, for example from 10:30 to 10:40, from 10:40 to 10:60,...

[K_Bull]

Hi,
So the individual file size at the moment is 40Gb not 4Gb?
Cheers,

[cova]

Sorry typing mistake no the individual files are 4GB.

[Brad_Turpin]

Hi cova,

Loading the full set of values for 1 or a subset of the file's channels is something you can do interactively with built-in dialogs in DIAdem.  Loading a particular index window of values for 1 or a subset of the file's channels requires you to run a VBScript in DIAdem.  Here's is an example of what that looks like-- you will need to calculate the desired index window from your known time windows, but if you have a constant sample period that will be simple enough.

Hope this helps,
Brad Turpin
DIAdem Product Support Engineer
National Instruments

[K_Bull]

Hi,
The link here talks about Time Slice loading, which looks like what you want to do. In the discussion forum link here, Brad talks about this a little more, and also provides information on what you need to do to use the Time Slice application. I hope this helps, and please let me know if you have any more questions.
Regards,