Simultaneously view several TDMS files?

Similar Questions

• TDMS files viewer used in a dialog box

  I would use the viewer of TDMS files within a VI dialog box. The problem occurs if I change the properties of the VI - appearance of window - window modal behavior (it should be modal).

  When I click the button and run the viewer of TDMS files become two modal windows (my Viewer file VI and PDM) and 'lock' to the other: I can't control any of them.

  Is it possible to use the viewer of TDMS files as a dialog box?

  Thanks in advance,

  Ljubo.

  We remember, made you changes to a copy of the TDMS files viewer and not on that of VI.lib. With a upgrade/reinstall of LabVIEW, you will forget this small change, and you're back to square one.

  Tone

• How to import a single channel of different TDMS files?

  Hello

  I have several tdms files which have the same structure of channel (ch1 - chx). Each channel by tdms file has a stored value.

  I would like to see the same channel, lets say ch1, of EVERY file of PDM, in order to have a responsible for all the tdms files 2D field

  the data portal.

  If I drag a channel from a PDM file, loaded on the data portal, I see a value of course. I would like to drag lets say five

  channels at once to get a 2D-plot in the display section.

  Is there an easy way to solve the problem?

  Thank you in advcance

  Hi Norick_17,

  I think you could do that with advanced search in the browser of DIAdem.

  Configure advanced as the attached picture. You can configure the search, so that you find ch1 on all files. Also, the select the minimum/maximum/average as additional search criteria.

  In the list of results, you will see a Channel.Maximum column. You can select this column and drag & drop it into your data portal. Each maximum value will be concatenated to a string.

  Best regards, Stephan

• Set the format digital u32 when writing of TDMS files

  We use two meters of a PCI-6251, with two counters in the mode of angular position, to measure the angular positions of the two optical encoders 1000 per second for intervals of 10 to 20 hours.  We are writing to write files using PDM.  The files are very large, about 800 MB, but it is acceptable.  Convert us the TDMS files in .txt files, and then the data from .txt files are analyzed in Mathematica.

  My question is: How does one control the digital format of the data that is written in TDMS write?  At this moment we have two counters of the value of the product N = 10000 numbers U32 samples are then transmitted continuously to a TDMS file every 10 seconds.  The counters are using units of ticks (integers) and we would like to see whole in our data files.  We are convinced that the counters are producing U32 to the format number, since we see the correct U32 integers in the indicators on the front panel and we see labels on the value axis on our waveform graphs are integers, not real numbers.

  But it is also clear that Scripture TDMS puts double-precision (64-bit) numbers floating point in the PDM file, not numbers of U32.  The double-precision floating-point numbers cause our .txt files to be twice as big as they should be - these .txt files are half full with useless zeros and decimal points.  In addition, when you convert the U32 to double-precision real numbers, it seems to be a loss of precision as a result of writing of PDM, which is not acceptable.

  Our experience produces pairs of integers: U32 (or I32) format.  We could even get away with numbers I16.  Is it possible to get our data to stay in U32 (or same I16) format when they are written to the TDMS file?  What controls the digital numbers written to tdms?  Do all the numbers written in a PDM file end up being written as floating-point numbers double-precision?

  We use LabVIEW 8.2 on a PC running windows XP.

  If associate you TDMS write U32 data, data in the file will be U32. Floating-point conversion probably occurs when you read data from the file back. You can change this by plugging in a U32 empty table at the entrance of 'data type' reading PDM.

  You can check the data type in the file by examining the channel properties in the viewer of TDMS files. If NI_DataType is 7, given in the file are U32. If it is 10, data are floating point.

  Hope that helps,

  Herbert

• simultaneous reading and writing files TDMS

  A customer had a program written in 8.6; the programmer is no longer available and I'm looking to debug intermittent problems.

  N - channels of data is acquired and streamed to a PDM file. The operator can select a channel to view data in real time, but the display is one scope table displaying 15 seconds worth of data and when switching of channels the program "returns" display with the last 15 seconds of a data value of the new string (barrier data extracted from the TDMS file).

  What I notice here, aside from using sloppy cluster error, is that both references are open in the file - one for writing data and the other for recovery data. Is this a good practice? is it necessary or one reference supports the reading and writing? Is this a possible source of problems?

  

  thanx

  lmd2

  You can do the same thing with a single file reference.

  The issue of not being able to see the data that was written after the reading of reference has been opened is known for having refnums to open in two different processes, but not in the same executable or VI.

  Herbert

• Viewer files TDMS file not found

  The VI I use currently is a slight modification of the example ContAcq & GraphVolt.  I've recently updated to LabVIEW 2009, and my Viewer TDMS open more TDMS files I record.  The files are there and I can open them using the example of ReadTDMS VI, but the viewer in my block diagram gives me 7 error: file not found.  There is a caveat, however.  If I save on a file that I had previously created, the file is located in the Viewer.  So if I save the file test1.tdms, the first time, it displays an error found the file, but the second time I save the viewer test1.tdms the file is located.  Any ideas as to why this is happening?

  Since my VI is close enough to the ContAcq & GraphVolt example (which does not work at the moment), this VI troubleshooting to solve my problem.

  
  

• change viewing several 2-to-1 page pdf files

  Hi all

  I have several PDF files which are their properties to display 2 pages at a time.  I would change all of them to have an initial view of a page.  Is there a way to change the properties of the initial view of several PDF files in a single operation?

  Thank you

  Starsky

  Acrobat X

  Windows 7

  Yes, in a process (or Action), but you must have Acrobat Pro.

• TDMS file creates several tabs data. You want to create only one.

  Hello NOR community,

  I am currently using the DAQ Assistant with my pots of chain record travel over a long time interval (see annex VI). I then use the vi "Write to a file as" to save the data in a file TDMS (see 'Write the file settings' photo attached for all the parameters chosen for the writing of the file). The file is written, however when I open the PDM file, the document creates a tab in Excel for every second of recorded data (please see attachment ""). It seems that the TDMS file is grouping all data every second, and then by creating a new group of data.

  How can I get the file to write all data on a single tab instead of creating multiple? I don't want to concatenate hundreds of tabs in a single great sheet.

  Thank you

  Chris

  You should not use the comment.  I just removed who and everything worked for me.

• Deleting a group to a TDMS file increases the file size

  Hi all

  I was searching for information on how to delete a group in a TDMS file. Apparently this is not a simple task as I thought because firstly, it is necessary to convert the TDMS file in a TOC file, remove the group from the TOC file and finally convert the TDM in PDM file. There is a sample project really nice here (I have attached it in the post anyway!).

  This project works very well. Indeed, I am able to remove the group from the PDM file. However, I realized that perform the deletion process increases the size of the file (about 4 times). If you are viewing the PDM with the PDM file - file Viewer.vi you realize that several strange properties have been added to each channel of all other groups. I assumed that this is partly the cause of the increase in size.

  Anyone know why this is happening?

  I'm using LabVIEW 2014 and I downloaded the project for 2014 LabVIEW.

  Any help is appreciated to higlhy.

  Best regards

  Diego Ballen

  The old way was to read each group that you want to save and write to a new file. The fundamental problem is that TDMS format has been optimized for speed and no memory efficiency, which can cause a lot of complications when you seemingly simple things - like the deletion of data, or reading the data of the file.

  That is why NEITHER came up with these new features. If you're stuck with an earlier version, you can always write your own function to do the same.

  Mike...

• TDMS file corruption when using FTP

  I use FTP to transfer files a cRIO to computer TDMS.  The transfer looks like it works; However, when I try to open the crowd using TDMS files Viewer, I get an error indicating that the file in not a PDM standards.  That being said, I use Windows to FTP the same file to compare.  I use the PDM viewer to open this file very well... no problems.  Have any ideas?

  Did you find the difference between the size of the TDMS files before and after the transfer? If so, maybe it's quite possible that the "transfer mode" software FTP questions, maybe you can try to use "binary" instead of "text" for fashion?

• Concatenate with DIAdem TDMS files, depending on the time

  This question is in French and English.

  Hello

  I'm trying to find a way to concatenate/merge several files TDMS analog measurements with DIAdem 2012, in order to have more than one file. I be provided with attachment 1.

  I am beginner in DIAdem and don't know not the language of the script code. En 986KO on this forum, I found the script 'Import data from several Files.VBS use', and changed lines 17 and 18 not 'csv' by replacing "tdms" (as it was stated on another topic on the forum). This script also appealed to "concatenate groups."

  The problem is that the TDMS files contain several groups (the slots on frame of measures Canada) each containing several different channels. This script concatenates so each group and the result makes more sense the script to modifier is certainly "CONCATENATE Groups", but in what way?

  Thank you

  Olivier

  ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  I'm trying to find a way to concatenate/merge several files TDMS analog measurements with DIAdem 2012, in order to have at the end only one file. You can find these files with my mail 1.

  I am a beginner in tiara and do not know the language of the script code.

  By searching on this forum, I found the script 'Import data from several Files.VBS use' and changed lines 17 and 18, replacing 'csv' by "tdms" (as demonstrated in another topic on the forum). This script also uses "groups of concatenate.
  The problem is that the TDMS files contain several groups (pointing to the slots on the frame measurements), each containing several different channels. If this script concatenates each group and the result is meaningless. I think the script that needs to be changed is "CONCATENATE Groups", but how?

  Thank you

  Olivier

  Hi Oliver,.

  Try to run the script you downloaded once for each group and encodinng group to load in the assignment of "ChannelSet" in line 10 using the index group, like this:

  ChannelSet = "[1] / *" or ChannelSet = "[2] / *".

  I just found out that this example breaks in 2014 DIAdem because the 'DataFileHeaderAccess' command has been relegated and replaced by a new.  I need update soon.

  Brad Turpin

  Tiara Product Support Engineer

  National Instruments

• Opening of TDMS files larger than 500 MB in LabVIEW

  Hello

  We were faced with a problem when opening files TDMS connected using a LabVIEW, PDM Viewer (the vi in palette Advanced TDMS) application, or by creating a new PDM vi player. The recorder app is built using TDMS functions in palette file.

  When the TDMS files are everywhere higher than 500 MB or the application hangs or crashes. It can sometimes give full error memory.

  I browsed the forum and found the screws to split large TDMS files into smaller files and then open them. The other option is to use NI DIAdem. Currently, we use the option of the tiara. We do not want to modify the application to split the files into smaller sizes.

  I'd like to understand why this is happening for files of these formats. I can easily play TDMS of 100 or 200 MB files.

  The configuration of the system plays a role in the present? How is it that DIAdem can open the file and cannot LabVIEW?

  request explanation

  Thank you

  Freelance_LV wrote:

  [..]

  What I want is to know if upgrade to Win 7 and LV 64-bit will solve this problem, without cut it files each time, or use the TDMS vi Viewer.

  More likely since the channel data is placed in a very wide range and fragmentation of memory makes it very hard on 32 bit with LV 32-bit OS. Another thing that could be a problem on your 32 bit LV: display data as it creates a copy of data. So maybe the original data of the channel can hold in memory, but tries to display it sweeps away memory.

  Another thing for 32-bit applications is to check the largest block of data you always free. Use tools like VMMap for your request of fragmentation of memory snapshot.

  As I wrote already, a generic application 64 bit triggers the limited "insane" values depending on the operating system like Windows 7... still, there are limits.

  Norbert

  EDIT: The link of Windows 7 go to the physical memory table on the whole system. This does not reflect the virtual memory available to a single process. Scroll down to the table "and address space limits of memory" a virtual memory figure that can be assigned to a process 64-bit on Win7 x 64. The value is 8 to...

• Name of the TDMS file for use in Diadem report

  I received a large number of TDMS files collected with Signal Express 2014 and all of these files are called voltage.tdms in several subfolders, when I opened a sample of these files in Diadem I see that they have unique names in the field title properties voltage.tdms and so I would like to use this in a report model that I created. What I failed to find it is an easy way to capture the value of this title and put it in my report model, there is a variable called ChnDataFileName name, but it gives me "voltage.tdms", I don't see any of these variables to extract the field title, anyone know how to access this field?

  Hi ADobson

  The easiest way is to drag & give up the property from the data of the report portal. Then you will get something like

  Title: @Data.Root.Properties ("title"). Value @.

  Hope that helps

  Winfried

• How do you find the name of the Group and channel your TDMS file name?

  How do you find the name of the Group and channel your TDMS file name?

  Nevermind, I've used the file viewer.

• How combine tdms files

  Can someone help please...

  My compact rio records in recent weeks, and to avoid loss of data (power failure etc.), the connected tdms files are divided into segments of 10 MB. The trouble begins when I try to attach the files to back up. The only way that I can find is to drag all the files in the tiara browser window, and then use the copy data view operations data table for each section of the file block - make a note of the new total line as the original file increases in length. It is a very boring and repetitive task.

  Does anyone have a script function to perform this task in batch?

  Concerning

  Karoline

  The most effective way to do this is actually through the shell:

  copy /b "C:\temp\merge tdms\test 0.tdms" + "C:\temp\merge tdms\test 1.tdms" + "C:\temp\merge tdms\test 2.tdms" /b "C:\temp\trash\blah.tdms"
  

  It is safe to concatenate the files TDMS_INDEX, also a long time that you concatenate them in the same order. It is also safe (and more practical) to remove them. Tiara will be re - generate.

  If you plan to use wildcards so for example to merge all files in a folder, you may need to find a way to make sure that they get concatenated in chronological order. Windows do not by default.

  Herbert