dec binary function.

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• file read write binary error 116

  Hi all

  I am double, digital table in binary data record and then try to read back but keep on getting error 116 (cannot read binary file).

  I've attached screenshots of the way I write my data in the binary file, then the way I'm reading it. Basically, my data are pieces of 2D double bays, which come at a frequency of 1 Hz and this is why I use the GET and set file size before saving to the file (i.e. so that whenever I add my file with new data).

  I tried all combinations for binary and read Scripture to binary functions, which meant that I tried a few options big endian and native, but I keep getting the same error. Also played the way I add my data, i.e. I used the options of 'end of file' and "offset in bytes" just in case it makes a difference, but again no luck.

  Any help would be much appreciated.

  Kind regards

  Harry

  Try to set the 'pre append array or string of size' true.

  That seems to work here...

• write waveform in binary

  Hello!!

  I'm trying to store a waveform in a binary file.  I use a labview 'write in the binary file' example as a guide.  My waveform is a waveform that simulated the LabVIEW express menu "waveform simulation."  Well, if I put a graphical indicator, I can see the waveform.  But when I draw a binary file, a very bad image in the form of wave.  Please, see the attachment.  I use the theorem of Nyquist, who say that the sampling rate needs to be 4 times the frequency.

  Please, if anyone knows, post it.

  Thank you

  

  

  Your problem is related to different endian format. Who will tell how the order of byte in the number are organized. To do this. In the toolbar, select Help and activate context-sensitive help. Hover your mouse over the "binary" function, and then select help in the Help window. Search for BOM

• LabVIEW 8.2 out of spreadsheet

  Hello

  I have some problems my data outputing to excel.  The project is to design a program that transforms a DC motor and a starter on and off at a specific time and save the RPM, the current and torque of these devices.  I am usind LabView 8.2 with a PCI-6024E and a BNC-2110. My vi seems to work fine when there are additions of worksheet to it.  However, when I try to export the data to excel, it will send only 1 set of data each cycle.  The vi is attached.  Any help would be greatly appreciated.

  Thank you

  First, you open a binary file, not a spreadsheet file.  You open the file outside of your loop, which is OK.  I don't see any write the function in your loop.  you are not writing anything in the file except the header stuff.  Inside the loop, you close the file over and over again.  You must move the close function outside of the loop and add a function to write inside the loop.  If you want to read your file with excel or a text editor, do not use the writing of binary function, use the writing in the spreadsheet file instead.

• Use to write key VI with a table of cluster

  Hello

  I wanted to use an array of clusters to define certain configuration settings for an application. Unfortunately, 'Write key VI' does not support the type of cluster. Has anyone modified this function ('write key VI') in support of cluster and cluster table? Otherwise, no idea to keep it as simple as possible?

  My clusters include boolean, path, U32 and string.

  Thank you

  Olivier

  FYI, I have eventually save the cluster as a binary ("Write to binary function') file and a VI to read/write it. Is the easiest way for me as the other functions seem to have a limit on the complexity of the clusters they can handle.

  Thnaks for your suggestions,

  Olivier

• Problems with queues

  Hello

  I'm still very new with Labview, and I'm doing something that seems quite complicated for me.  I've already implemented a code that collects data from an acquisition of data and plots.  Another thing this does is backup data out of data acquisition.  I am now trying to add features to give the user the possibility to run a saved file or data acquisition, and I'm having a lot of trouble.  My queue still works when I want to execute an acquisition, but it does not work when I try to open the saved file.  I have attached the original code that I'm doing.

  I am not attached to the method that I took to choose between learning and reading of data, so if there's a better way (and I am sure that it is) please let me know.

  Thank you

  Anthony

  Thanks for the explanation of your data types.  I always recommend that you try to be consistent on your data types; If you never use a floating point values, then change your declarations of constants, and to eliminate the son orange.  Also, I still think that your problem is somewhere in the way you read your data.  Correct me if I'm wrong, but it seems that when you read data from the DAQ card it's an I32, but when you read it in your file, it's a U8 (implicitly converted an I32).  Then you divide that value by 256, which works very well for the I32 of data acquisition card, but produced only 0s for the U8 values read from the file (the maximum value of a U8 is 255, so divide produces a value less than 1, which is cut to 0 when you convert U8 before you subtract 32 and send it to the queue).

  EDIT: also, be careful when using the functions of text file for binary data, even if you think it's all ASCII.  You have the opportunity to "Convert EOL" checked, which means that LabVIEW can modify, insert, or remove values that correspond to the ASCII code of a character to end of line.  Consider using binary functions.

• Load several binary files (.r32/.r64) with DataLoadSel or similar functions

  I want to automatically load several R32-records in the database, there is no DAT file that contains the structure, it must be created. Currently my script gets a list of files one then a loop produces a header for each file and the bed. The structures are beeing set correctly, the first file is read correctly, but after the data of channel of each following file are empty/filled with zeros nearby.

  If I read about each file, the data is correct. There is a new DataFileLoadSel function, but it cannot read the binary data files.

  I think indexing is correct. I have no idea why playback does not work, any suggestions?

  Code:

  While (numLoop > 0)

  Call HDDelAll()

  GHDChnNo = DynChannelNo

  GHDChnLength = ChannelLength

  GHDChnType = "EXPLICIT."

  GHDDispFormat = "digital."

  GHDChnFile = chnFile

  GHDSaveType = 'BLOCK '.

  GHDChnIdx = 1

  GHDChnMode = "REAL32".

  Call HDCreate()

  Call GroupNameChk ("EMB-BKV-Data-" & (numFile + 1)) '... GroupCreateName

  Call GroupCreate ("EMB-BKV-Data-" & (numFile + 1), + 1, 0 numFile) '...

  Call GroupDefaultSet (numFile + 1) '... TargetGroupIndex

  Call DataLoadSel(chnFile,"1-",0) '... Data file, ChnNoStr, IncludeHdLoad

  ...

  loop

  ...

  I found the error: ChannelLength is not equal for each file, it must be calculated first.

  ' get the length of the file

  retVal = filesize (chnFile)

  ChannelLength = round (retVal / (sizeOfFloat * DynChannelNo))

  If (ChannelLength * sizeOfFloat * DynChannelNo) <> retVal then ' error handling

• Sleep function and passing binary icon updated

  Hello

  I'm new to LabWindows/CVI and I have a question which might be very simple to answer.

  When a sleep function is used within a binary switch, how can I get the icon on the main table to update as soon as I click on the switch, rather than change the status that the sleep function is complete?

  In other words, if I have a switch to which I have applied a delay of x seconds (via the sleep function), when I run the program and click on the switch, its status changes after x seconds. Instead, I'd like to change it immediately, and then wait x seconds before the action of the switch to take place...

  I appreciate all help. Thank you!

  Just before calling sleep, add: ProcessDrawEvents();

  JR

• text box and convert binary dec.

  I'm trying to convert numbers to text (dec) files in binary

  and use these values to decode.

  can someone help me...

  I am facing some problems because its 2d table?

  can someone help me a that...

  The output of all the lines of reading worksheet is supposed to be a 2D array. You just need to use the Array Index for the column 0.

  Look at the amendment attached.

• Write a bmp to binary questions

  Hello

  I have a string of text BMP I got an oscilloscope of Yokogawa. I can write this file directly to a. BMP, but binary writing adds 4 bytes at the beginning of the BMP string that actually a BMP format invalid. Remove the 4 bytes with a text editor, save, and reopen the case it will be valid which can be opened by any image viewer.

  I also tried the regular script text file function, but it's the jarbled of the image, however, does not add the 4 extra bytes as a binary writing.

  And I tried the recommendation of this post, but the BMP file is also jarbled.

  http://forums.NI.com/T5/LabVIEW/problems-creating-a-BMP-file/m-p/757714/highlight/true#M347071

  Here's my VI:

  

  Writing the file binary write, extra 4 bytes...

  

  I see here the 4 bytes in the data string.

  

  What happens if you wire a FAKE on the array or string of size "prepend" when writing the binary file? (the default is TRUE).

  (If you use 'write in the text file' be sure "convert EOL" is disabled (it is enabled by default).)

• How the names of variables and units used in the binary output file

  My colleague will give me LabView generated from the binary files (*.dat). There are more than 60 variables (columns) in the binary output file. I need to know the names of variables and units, which I think he has already configured in LabView. Is there a way for him to produce a file that contains the name of the variable and unity, so that I'll know what contains the binary file? It can create an equivalent ASCII file with a header indicating the name of the variable, but it does not list the units of each variable.

  As you can tell I'm not a user of LabView, so I apologize if this question makes no sense.

  Hi KE,.

  an ASCII (probably the csv format) file is just text - and contains all data (intentially) written to. There is no special function to include units or whatever!

  Your colleague must save the information it records the names and values in the same way...

  (When writing to text files, it could use WriteTextFile, FormatIntoFile, WriteToSpreadsheetFile, WriteBinaryFile even could serve...)

• Cannot use the Val function in a script use

  I'm trying to convert a text string (binary number) in a number by using the Val function in a script of use but the colors of tiara the term Val in red and the script produces an error indicating "Variable is undefined:"Val"

  Why is that happen? Some functions are not allowed in use scripts?

  In addition, it seems impossible to use debugging in my use - if I try to add a variable to the Watch window, there never have any value even if I put a breakpoint on this line of code. Would it not possible to debug scripts use?

  David,

  regarding your question on "Val" I would like to direct you to the "File.Formatter.ParseString" function which is part of the API available at DataPlugins.

  CDbl and CLng do a good job in general, but they are dependent on the local configuration of the PC. 'ParseString' is so much more reliable.

  Andreas

• Use the indicator binary enum in the public Service but allow several indicators

  Hello

  I have a few clusters that contain enums where the user can select a value among many others. However, sometimes these enumerations are binary indicators and I want the user to be able to select more than one indicator at the same time, which will then be DSB. What I usually do is to have a table with the data type as enum, and I simply OR all the elements in the array.

  I was wondering if anyone has a better suggestion how to do that?

  Thank you

  M

  Use a listbox control, and then leave several items to select.  It returns an array containing the indexes of all selected items.  You can use it to find the values of mean to you every element of another table.  Or if the order of the elements in the array is just right, you can make a 2 ^ math function table and add the resulting table.

  

• The binary file format

  With the help of LV2010.  I have a program that stores data in a binary file.  The file is a set of strings and floating point values.  I need to write another program in VB.NET that can save/read these files, so I need information on the actual file format of the data.  Is there a documentation which describes how the file is saved?  Thank you.

  Interesting. Usually, this question gets asked in the opposite direction with people trying to decode in a cluster.

  If you use the WriteToBinary function, your data are written as native data types in order to cluster in the binary file. Because you use a cluster, each string is being preceded by a length, which I believe is an I32.

  This is described in the help file for writing to a binary file. I think the people of thing travel length of string/array much however.

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  Front panel.  Right-click.   Display format.