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  Simple Reentrant-vi question         


Author: Pnt
Date: Jul 22, 2008 22:40

If i press button2 first and then button1, both instances of reentrant vis, open.
If i press button1 first, the reentrant vi must first be terminated, to allow pressing button2 and open the next instance of the reentrant vi !
Why is this happening?
 
Labview 8.5

main_BD.png:
http://forums.ni.com/attachments/ni/170/343172/1/main_BD.png
3 Comments
  synchronization problem between FPGA and host         


Author: Sithu
Date: Jul 22, 2008 22:10

Hi,
I have cRIO 9004 with 9104 FPGA and 9201 IO module with me. A sine wave is acquired from the IO module and sent to FPGA vi. It is displayed in host vi. The interrupt method is used for syncronization. But the sampling rate of IO module 500kS/s is not achieved. Is there any problem with my streaming code?Message Edited by Sithu on 07-22-2008 11:54 PM

Analog Input (FPGA).vi:
http://forums.ni.com/attachments/ni/170/343167/1/Analog Input (FPGA).vi

Analog Input (Host).vi:
http://forums.ni.com/attachments/ni/170/343167/2/Analog Input (Host).vi
1 Comment
  Publishing the instrument configuration?         


Author: RichLamb
Date: Jul 22, 2008 19:40

Firstly, excuse my ignorance - I'm still pretty new...
I have an instrument, which is actually a camera but for the sake of argument could be anything. This camera has an internal configuration, called "attributes" in LV I think.
My first point of confusion came when I tried adjusting the config in the camera using it's native software - the configuration under LV had not changed!
I soon discovered that to adjust the configuration seen by LV, I had to use MAX to set up my camera - so it seems the NI approach is to have some hidden configuration data somewhere for my instrument, that is managed by MAX.
 
This is all fine (now I'm aware of it) while I'm using the instrument under development, but what happens when I want to deploy the LV application as an executable to a machine which does...
Show full article (1.66Kb)
7 Comments
  Writing string to binary file without string Pascal style string length prefix         


Author: massybird
Date: Jul 22, 2008 19:10

I'm working on creating a binary file (little-endian) that will be read by other programs than LabVIEW.  It simply starts off with a four character string 'iiii'.  LabVIEW flattens the string and writes string length as prefix before writing the actual string: 'iiii' binary file: 00 00 00 04 69 69 69 69I'd like to simply write:'iiii' binary file: 69 69 69 69The http://zone.ni.com/reference/en-XX/help/371361B-01/lvhowto/using_the_flatten_to_.../" target="_blank">documentation talks of converting each character to decimal then to hexadecimal, then finally writing each char of hex string.  I have not been successful in doing this.  Please let me know if there's a clean way of writing strings to binary file without the Pascal string length prefix. ...
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4 Comments
  Delete repeated rows from table         


Author: ethan85
Date: Jul 22, 2008 18:40

Hello, im having a trouble...
 
I have a 2D array (Table) as you may see in the image.
 
I want to delete all repeated rows except two, i want to leave one row with 123QSD and all the remaining columns and the 344MX and all the remaing columns.
 
Thanks!!

array example.jpg:
http://forums.ni.com/attachments/ni/170/343138/1/array example.jpg
3 Comments
  Problems (bugs) with Project Explorer LV8.5.1 Windows Vista 64bit         


Author: Beach Comber
Date: Jul 22, 2008 18:40

Helo all,
 
I am using Windows Vista 64bit with all updates and service packs on an ASUS G1 dual core 4gig memory.  After writing code for a while I find that I cannot execute my top level vi from the project explorer.  I can run the vi from outside the project no problem.  If I try to create a new project and load the vi into it the LV hangs and the windows task manager cannot kill either the vi or the new project explorer, I have to reboot the computer to recover.  I have attached the vi.
 
regards,
Karl

FS Test Main V0.9.vi:
http://forums.ni.com/attachments/ni/170/343137/1/FS Test Main V0.9.vi
1 Comment
  Changing web server refresh to less than one second         


Author: tmunsell
Date: Jul 22, 2008 18:10

I just set up another PC on our network to display our engine test VI.  Is there any way to increase the refresh rate to less than one second.  I tried entering .5 sec on the config screen, but it changed back to one second.  I'm using LabVIEW 8.5.1. Thanks,Todd MunsellWood Group Pratt & Whitney Industrial Turbine Services
11 Comments
  C and labview interface         


Author: Miaa
Date: Jul 22, 2008 17:40

Hello folks, I have a hardware interfacing project. I am curious if there is an tutorial on how to combine the interfacing code with Labview front panel GUI. The code is in C and/or C++ ( not a dot net or visual C ). Let me know the minimum requirements from labview version number. If there are any examples , i will like to try those out.PS: The other option was using java and Labview , do you think that is better than using C/C++ ??Many thanks
3 Comments
  when to use local variables vs. cluster constants         


Author: krispiekream
Date: Jul 22, 2008 17:40

i have this diagram. is it right what i am doing?i want to use bundle/unbundle to run my wires. but in order to display the NEW VALUES ..i have to use local variables?i was told never to use local variables so i dont know if what i am doing is right. can someone explain?thanks in advancehttp://forums.ni.com/attachments/ni/170/343132/1/untitled5.PNG"> Message Edited by krispiekream on 07-22-2008 07:18 PM

untitled5.PNG:
http://forums.ni.com/attachments/ni/170/343132/1/untitled5.PNG
10 Comments
  data spikes         


Author: _Bryan
Date: Jul 22, 2008 17:10

Hello,
 
I have attached an image of some current temperature data and the spikes I am getting.  I am logging data at 1 sample a second and there is about 8 hours of data in the image.  The spikes can go to -160,000°C, usually for 1 or 2 samples then return.  Any idea on the best way to get rid of them?

chart noise.png:
http://forums.ni.com/attachments/ni/170/343131/1/chart noise.png
2 Comments
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