filtering of the data sent to write to the file of measure

Similar Questions

• Control of data rows Excel (write on a file of measure)

  Hi all

  Objective:

  Get a bit of a live waveform of two pressure sensors, as well as calculate the differential pressure. The LabVIEW VI is intended for students for an exercise in module, in which data are exported to an excel file for the students to perform other calculations. Excel file must contain data from the beginning to the end of a race.

  Problem:

  Pressure sensors work well, waveform table works well, but when you stop the collection of data, the amount of lines in the file Excel output will reflect the number of samples per channel of the DAQmx Read Block (10 = 10 rows of data, 100 = 100 lines, etc.).

  I would appreciate some advice on how to conduct the data collection in the part worksheet from start to finish, without this affecting the aesthetic experience of the student (by that I mean the number of channels of the > 10 sample will cause some lag in the waveform, jerky). I tried to resolve this issue with something in the sense of Tank1Solution.png without success. I've included a photo of the original block (Tank2Block.png) and so I worked the file VI.  Once more, any help would be much appreciated, I'm not well versed in LabVIEW and I do not know how to address this problem effectively.

  Some guys are always doing things the hard way

  

  Of course, you need a son to ai0 - ai2 and ai1 - ai9.  This linear scale DAQmx is of course very convenient! and hey, the TDMS files import beautifully into Excel! the addon is there then why not just open a session data?  TDMS is much more portable than xlsx.

  A few additional remarks. (a) you can't stop this vi before you press Go-who needs a fix. (b) Create scale is likely to return an error as it is the name being illegal. I named it that to show the source of the scale and offset values.

• Write to the file of measurement with a loop For using the value of the dynamic data attributes

  I looked and looked, but couldn't find a solution for this.

  I currently have 15 points of different data that I try to write in an Excel file.  I have all combined in a table and lie with the function "write into a file position.  However, the column names are always "Untitled", "Untitled 1" etc.  I then used the function 'Set the Dynamic Data attributes'; but for this I have to do 15 different functions "set data dynamic attributes.  It was suggested to use a loop with the function 'Set the Dynamic Data attributes' inside of her, but I can't find how do.

  I have several arrays consisting of 15 different values for 'Signal Index' 'Name of Signal' and 'Unit', but also a unique 'get Date/Time In Seconds' related to 'Timestamp '.  The problem is that the error I get when I try to connect the output with Scripture at the entrance to measure file:

  The source type is dynamic data table 1 d.  The type of sink is Dynamic Data.

  How can I fix it?  I have attached a picture of my installation; Sorry if this is gross (I'm new on this!).  Thank you!

  It will get rid of the error, but it is not quite correct. What you need to do after that is to click on the output or the tunnel entry and select 'replace with the shift register. In addition, the array of values that you have wired to the Signal Index is wrong. Arrays are 0 based. Just wire the iteration Terminal here. And, finally, take the size of the table and this connection to the N terminal are stupid. Don't wire nothing to this.

• Cannot write to the file of measure

  Hi all

  I'm acquires data from the analog input using the DAQ with Embedded controller PXI8186 Wizard of PXI6259
  I'm writing a file format xlxs using writing to express vi measure, every time I have applied no file has not been created
  I tried several files such as C:\test.xlxs and C:\Users\name\Desktop\data test\test.xlxs directory
  not yet a single file created on my host pc or PXI-8186. After that I implemented the program displays window "are you sure? Your data will not be saved to a file"and have two choices to choose Donot save or try again
  I really want to create the file on the host PC if possible help pls thanks in advance.

  Better subject.
  Wuttikrai

  You try to deploy the express vi into your RT controller? You should try using the low level screw and you can use the shared variable to transfer the data to the host. The method that you try may work only when you have the card in your PC. Also, you will get only the latest data saved to your file as you write the last item coming out of the execution of the loop. Try to restructure your code and check examples of LabVIEW.

• Column filtering for the current year measure

  Hello

  I'm blocked up with the question, we have a report of three tables D1, D2, and F1. Where D1 is of time dimension. We now report D2 and F1 with action, and the report is placed on the dashboard which is having the guest of the year.

  F1 is joined with dimension D2 and D1 time as well, the requirement is in the report we measure column say X should always show the values for the current year, while others displayed according to the prompt values... In short, I want to show the column to measure for the current year, even if the user selects the value of prompt for year earlier and it must not change the values.

  Please let me know, how to get there.

  Thanks in advance

  I am able to do this by following steps.

  1. I created a column in the MDB layer with similar to above said Srini case statement.
  2. Then I made the logic level of the time dimension column at ALL. So obiee ignores / filter join with the dimension of time to this measure, and the measure will always displays the data from the current year according to the case statement.
  3. If I did not this measure to all levels at the logical level, it's not working to the dashboard, when we change the year with the previous year it shows null values or zero according to the instruction box.

  Thank you.

• writing data to the file of measure

  Hi all

  I'm trying record rpm with an encoder in quadrature (200 ppm) in a LVM file with a timestamp of each saved value. It seems to work, except that it registers more values in the file LVM I want. I put the DAQ Assistant to save read 1 sample at a frequency of 1 Hz. However, when I open the file LVM generated by writing custom file Express VI, sometimes I get 42 values per second, sometimes I get 13 and so on. If I don't get a constant number of measurements per second. How can I specify just measure of folder 1 per second, or 5 measures and so on?

  I'm using LabVIEW 2011. The encoder values be read as a frequency and then converted in rpm. Thank you! Files and images attached.

  Your Express VI is not configured to play at 1 Hz. The synchronization method is the default value, which is used for the reading of the frequency as you do. This basically means you're sampling on the rising edge of the input signal, then you're really sampling rate at the same rate as your frequency.

  To do what you want, you can change to mode 1 sample (on request) and add a 1000ms waiting your loop.

• Write to the file of measure seconds (10)

  Hello everyone, if you display the VI attached, you can see that I'm running my average in a .tdm file. That's fine, but I want to document the average all ten or so seconds, instead of dry chaque.25 that she is currently recording. Any suggestions? As side note... is possible to stop the .tdm file to have stuff all that extra (Group, channels, description, wf_ *, etc.)?

  
  

• Write to the file of accounts, data from customs (intersection POV) in the rules of HFM

  Hi all
  
  I'm trying to use scripture to deposit into the HFM rules. I am able to get the entity, scenario, year, time, and Timestamp to save to a file (see code below). Is it possible I can get accounts, customs and crossing of data also to write to a file and make the analysis of perfromance? Basically, how can I have the whole POV in a log file and test the rules.
  
  f.WriteLine txtStringToWrite & '-for:-"& HS. Entity.Member & "-" & HS. Scenario.Member & "-" & HS. Year.Member & "-" & HS. Period.Member & "" & Now()
  
  Thanks in advance. Looking forward to hear from you.
  
  Chavigny.

  The account, PKI and custom dimensions are not part of the point of view that the entity, period, year, scenario and value. The only way that you can write these dimensions in a file is to call them in a table, as HS. OpenDataUnit, or list any. It is the only way to get the context for intersections.

  If you try to write data to a file, you'll end up with a file that is at least as large as the database itself and could be a very slow process. If that is your intention, you would be better to simply analyze the database. Write to a file should be used only for debugging.

  -Chris

• Quickie: Write to the file measure VI, how to create the new file?

  I use the writing on measurement file express VI in my code and I plugged into it a control that sets the location where to save the file of measure

  The only problem is that the file of measure must exist first! I cant for example, from the Control Panel, click the directory to browse box, navigate to a folder and type a name for the file. It just says: file not found! It's like the control file directory opens a file to save in, rather than creating a new file to this location

  How can I solve this?

  AlexMason86 wrote:

  Project attached

  If I go into the navigation options, what should I do? Just selected new and existing files?

  Uh, Yes. Also, there is a help button.

• Record to the file of the measurement at will

  Hello.

  I'm new to LabView and so far it has been easy enough to learn this software. I like really I. I use a USB-1208FS MCC to measure signals from the real world and enjoy to LabVIEW.

  The thing is I want to be able to save to a file of measure at will. That said, when I press the Start button, it will start measuring but DO NOT save data to the file measure until I touched another button, a "record" button This is when I want to save the data. Is it possible to implement in LabVIEW? Because as soon as I start sampling that he recorded in the file of measures.

  Should which functions I use? I'd appreciate any help.

  Thank you!

  Pretty simple with a case statement.

  I recommend you:

  3-hour course

  6 hour course

• How many channels can I write to a file with the data Module write (Dasylab 12.00.00)?

  I would like to write data from a large number of channels (up to 128) in the same file. Thanks to the write data module, I have up to 16 channels only! The only solution I found is to save data in different files 8... Is there a solution for this problem? I use DASYLAB V.12.00.00. Thank you

  You can use the multiplexer unit, this will allow you to compress the 16 channels in 1 which saves up to 256 channels in a single file.

  In the module of the file to write, you can then select options and, under the "input Type", select the values of mixed singles.  You will then need to define how many channels in each entry will receive.

• Try to write data to the file, but error 200279

  I have problems when writing data to a file. 10 seconds in the recording process, I get the error 200279. I did some research on the subject, but I am unable to corect my code. I think I want to increase the size of the buffer, but he prefers, I suppose, to read the data more frequently. The way that I save my file is, before starting the VI, I attribute a location and name of the file (e.g. data.csv). The date and time is added at the end of the actual when file the I start to record the data (e.g. data_07-26 - 13_122615.csv). If the file does not exist, it creates a new file, and then adds the data of this file after each iteration of the loop. The reason why I did this way was so I don't have to worry about running out of memory, but apparently my code is wrong.

  

  

  I will include a copy of the faulty section of my code. Any help would be greatly appreciated.

  Thank you.

  Your problem is that the writing on the disk is slow.  It is pretty slow so it causes your DAQ buffer overflow and cause error and loss of data.  What you need to do is to implement a producer/consumer.  This will put the data acquisition and recording on the disc in separate loops.  This will allow data acquisition work at speed, that he needs to deal with incoming samples and writing on disk can run at all what pace, he can.  You send data from data acquisition to the loop of logging using a queue.

  You can also think about changing how you write to the file.  VI is constantly open and close the file, which is a very slow process if you do it inside a loop.

• write table 2D data in the file but the file is empty

  Hello

  I tried to write all reading of powermeter data to a file in two ways, I can see the output in the Arrais indicator data but when I write to "File.vi of the worksheet" or write to 'text file', the files are empty.

  Please help me.

  Try to remove the vi "STOP".

  I suspect, it prevents the main vi before the backup occurs.

  As a second point: given that you save data inside a while loop be sure you add the data from the file and not crash each time.

  wire that is a 'real' terminal 'Add file '.

  Kind regards

  Marco

• How can I write snapshot of my data to the file measured every 5 seconds

  Hello

  I try to take a snapshot of my stream once every 5 seconds and write it to a. File LVM. I have problems with the VI "write to a measurement file. The pace at which it writes data to the file seems to be dictated by the 'Samples to Read' parameter in the DAQ assistant. I tried placing the VI 'Write in a file measure' within a business structure and the launch of the structure to deal with a "time up" VI. As a result only in a delay of 5 seconds before the insiders 'Write in a file as' VI. Once the VI 'Write in a file as' is launched, it starts writing at 20 x per second. Is there a way to change it or dictate how fast the exicutes VI 'Write in a file measure'?

  My reason for slowing down the write speed are, 1) reduce space occupied by my data file. (2) reduce the cycles of CPU use and disk access.

  The reason why I can't increase the value of 'Samples to Read' in the DAQ Assistant (to match my requirement to write data), it's that my VI will start to Miss events and triggers.

  I don't know I can't be the only person who needs high-frequency data acquisition and low-frequency writing data on the disk? However, I see a straight road to key in before that.

  The equipment I use is a NI USB DAQ 6008, data acquisition analog voltage to 100 Hz.

  Thanks in advance for your help

  See you soon

  Kim

  Dohhh!

  The re - set feature has not been put in time elapsed VI!

  Thank you very much!

  See you soon

  Kim

• collect the data to write to the file

  Hello everyone!

  I was wrong of wich pretty depressing problem my mind... for a few days. I have a VI with while the witch loop is part of the largest project... my goal is to collect data and save them to file after 1000 while loop activities... be more specific - after all done loop 1000 moves I want to write to the file, the number of strokes (in the 'Number' of an attachment photo) and the result of the value ('table') should be a kind of table (2columns 1000 lines)... I can't do more while ower loop all the VI because it allows the other VI to work... Can you suggest me sommething?

  .. .to while say you the activities of the do loop iterations?...

  Yes, it's wright, I couldn't find the wright expressin at the end of the night.

  OK I will try to write to the table line by line... I'll check up is it posible to add to an existing spradsheet of the file a line of data for 1000 times after each iteration of the loop... it might be more reliable because each iteration of the loop is device once in a 30 min, and if your PC loses power I lose all data.

  Thank you so much for the ideas!