Application of Datalogging

Similar Questions

• How to install the OPC Server with the Application Setup

  Hi all,

  I make the datalogging progam in the PLC via modbus communication using the OPC server.

  1. I got configer the opc via the Project Explorer client some time it works perfectly, but when I run it by the next day, he cannot communicate with an OPC server but the OPC server is to communicate with the PLC. When I right click on the properties of the customer e/s in the exploer project opc and make any change and still run the application it works where is the problem.

  2. the second problem is by building the installer that will be installered to my PC targate OPC server. Bacuse I had installed the application on the computer target just for testing but OPC Server havn't installed even if there is no option for adding the OPC while bulding server.

  Serdar, SALVATION

  Thanks for the reply I saw your example, your idea is ok, but if I have more then 100 and with different types of data tag then where is the problem to manage all these tags.

  Now, what I had done I took the express to create vi or configer server I/O and give the name of the process even as file name as opcdemomo and same server name reference in the Project Explorer and restart and scream in low tow and three times it works I havn't get any problem.but which is not the right method. 

• How can I recover datalog records written beyond the 2 GB limit?

  
  

  I found a solution.

  Here are the steps I took to divide a datalog large (> 2 GB) file into two files more small datalog (each< 2="" gb)="" so="" that="" all="" records="" could="" once="" again="" be="" accessed="" by="" an="" application="" that="" employs="" datalog="" file="">

  1. Open the file datalog as a byte stream file using file open/create/replace.
  
  
  2. Search the file for a sequence of bytes corresponding to the ID of the record to the first record to retrieve using binary file reading. (I knew my type of cluster datalog this ID U32 Record marked the beginning of a record.  For efficiency reasons, I have read 100 000 bytes blocks every time and kept track of the byte offset location in the file.)
  
  
  3. Search the file for a sequence of bytes corresponding to the ID of the next record (or eof if it was the last record) to determine the size of the current record.
  
  
  4. Read the current record in a byte array using read binary file in conjunction with the Position of defined file that works correctly for files up to 4 GB in size.
  
  
  5. Repeated steps 2 through 4 for the other subset of records targeted for one of the new files datalog.
  
  
  6. For each byte array, flattened the array of bytes to a string (precede the size of the array = False) and then not flattened the binary string (data includes the size of the table = False) according to my record datalog type.
  
  
  7. Save each record not flattened (cluster) to the new file datalog.

  Using the above procedure, I was able to bypass the need to create my own datalog file headers so I did not need to understand the specifications of datalog file format.

• Compact Daq or Rio measurement signal and datalog

  Hello

  I'm in a project to create a diagnostic for an offshore wind turbine generator system.

  So I have to choose a material acquisition and make the basic operations with the measured signals.

  The equipment has to work without being connected to a PC, write the data in the internal memory, and then send it via ethernet.

  The CDaq and the controller chassis is cheaper than CRio, but she would work without a PC (with the exception of couse the stand-alone version that is overpriced)? Is it possible to add memory via USB to a CDaq (for datalog)?

  Hello

  If cDAQ standalone chassis is more than your budget, then cRIO is the right/only way to go. The good thing is that they share the modules C-series real connectivity and conditioning of signals is the same. Youneedtohavesomeformoflocalintelligence/processingpowertoevenperform the taskofwritingdatatoaflashdrive "simple."

  This is a technical presentation online that might interest you: measures and monitoring in Offshore Applications

  Let me know if you want me to make a connection with your local technician to NEITHER.

• Adding in a Datalog file

  I'm unable to add data to the datalog file in the attached example.  It saves the data to the first save iteration but won't add data on subsequent iterations save.  In exmple atteched save iteration is 5 seconds.  In the effective application of the iteration save will be hourly because a few days worth data necessary to be connected at a rate of 50 MS.

  Please indicate how I can get it to add data and how the example can be improved.

  I'm using Win - XP and LV 8.6.

  Thank you

  Dave

  Hi dj,

  you are writing in the file of datalog - it grows with time...

  The problem is: you read only the first datablock!

  You write the revenge of 100 lines and if you read the revenge of 100 lines.

  While you always open the file again you always read the first datablock... And the number of reading is unwired, so by default! comes into play!

  I suggest you:

  -Use a queue to move data between the loops.

  -Use a different dataformat such as simple binary files. What happens when you allow 25 rows of data, but want to read 100 lines of data? (Which is what happens when reading and writing data type will be different?)

• Can not read the RTC in an application deployed on cRIO9022

  Hello

  I built a datalogging application that stores data in a file name to the name = current date/time on USB. It works fine when connected over the network to the development computer, however, when it is deployed as a start VI, section date and time to the file name are missing, as if he can't read the RTC. The file creation time setting is correct.

  any suggestions?

  Thank you.

  Think I found it. When deployed, the front panel indicator ceases to exist.

  http://digital.NI.com/public.nsf/allkb/FC5024A5DD6344C886256C8C0054689B

• convert datalog reference to "generate report object Referecnce.ctl".

  I inherited a LV6.1 code with a lot of reports. The former reference number of datalog used to refer to the reports has been updated report object Reference.ctl.

  In the original code, the first step is to check if the number of datalog was not "a path/number/RefNumber '. But this function no longer works with the new "report to" the object. Is there something else I can use to reproduce this function?

  Thank you.

  Hi efarr,

  I'll do what I can to help you with your problem.  First of all, I need to know what version of LabVIEW, you try to run the LV6.1 code that you have inherited.  You can try your report at the node of wiring to another function of reporting (such as programming > report generation > progress reports > get a report Type) and the error on the node of wire to the terminal case selector on the structure of your business.  If the report is Type VI Gets a bad report of signal, it should output an error which will then control the structure of the case.  Instead of 'True' and 'False' cases, we had you previously, your case will read "Error No." and "error".  Without understanding your entire application I can't be sure this work around will make your program works in the same way.

  I would like to know if it works.  I hope that you will soon be operational.

• Memory is full (~ 10 GB datalog file)

  Hello

  I developed an application that generates a temporary file (*.csv) record datalog with @10ms. after a trial of ~ 3 days, I need to merge all the temporary files into a single file.

  implementation: to merge into a single file, I calculate the total line is every temp. File and reading k 25 ranks by iteration, and I write in the file main datalog. When the file size reaches ~ 400MB. I have labview: memory is full error. in the loop, I used "deallocation request" palette ", but did not work."

  I enclose the screenshot of the code. Please suggest me a solution

  
  

• Removing applications on ipone 7

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  Use a lighter touch, or disable Touch 3D via settings > general > accessibility > Touch 32 > Off.

  TT2

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  I just updated to ios 10, before, I've had a few business installed and verified applications.

  update to ios 10 that apps have been seen as not verified.

  I tried to check, but it didn't work.

  I type check it just loads and stops in a dry, without verification.

  What should I do?

  I have the same problem.

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  To upgrade my iMac Yosemite Sierra can I first of all backup and upgrade the iWork etc. applications. ?

  He can't make a backup.  You don't need to do anything else.

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  ALF593 wrote:

  iPhone 6s - IOS 10.0.2

  change - something I can hold is no longer an icon of the application to move around on the screen?

  No, it's always in the same way, may need to adjust how you hold on this application, so it wiggles, instead of the 3d button.

• New on Mac w/purchase of Pro. You want to run Windows applications. 8 vs 10?

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  The two big names of virtualization are Parallels and VMware. They have a sort of leap-frogging each other in terms of features. Parallels has a fairly seamless integration between Mac and Windows.

  Your Mac is also already comes with Boot Camp, which lets you install Windows on a separate partition.

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• "Your system is running out of Application memory"

  Hello

  Since last week I have been having a problem where my computer screen appears with a reading of the question 'your system has sold out of the memory of the application.' This happens around every 20-30 minutes to use my computer, where the issue is resolved by restarting my computer. However, this message appears when I have 1 or 2 applications open (including the permanent Finder application). At my computer without a doubt a lot of memory left and I installed only 5 additional applications: League of Legends, Microsoft Excel, Powerpoint, Word and Outlook. I used OS X El Capitan for the first half of the week and macOS Sierra for the second half, but the upgrade did not solve my problem.

  I run:

  MacBook Air (13 inch, mid 2013)

  1.3 GHz Intel Core i5 processor

  DDR3 4 GB 1600 MHz memory

  Start drive Macintosh HD

  Graphics Intel HD Graphics 5000 1536 MB

  Your system is running out of RAM, not disk space. 4 GB is the absolute minimum of RAM. Try to remove all unnecessary startup items (Preferences > users and groups > you > login items) with the key less (not simply uncheck the boxes - which hide just the app but it still works).

  You can also run activity monitor (Applications > utilities) to see what is using the memory.

• "Read" notice on the application of instant messaging, a question?

  IM Apple allows you to send a notice as a snapshot message was 'delivered '. I understand what it means. Recently, the opinion has changed to 'read '. I do not understand how the IM application knows whether or not the message has been read. I usually leave my IM window open when I use this app. It is therefore impossible to know whether or not I've read a message. I guess that more than others to do this. So that the 'read' notice means?

  Messages has an option in the preferences/Messages/accounts, which allows the recipient to send read receipts.