Using stand alone executables to send data to the parallel port

I have a executable that uses the parallel port to activate an alarm. The program works well on the base machine which is running windows XP. However when I try to run the stand alone executable on a windows NT machine there is nothing sent to the parallel port. I have updated the Cvirt file on all machines. I don't get any error messages when running the stand alone executable.

I have the same situation using parallel port to control a hot swap PCI extender card and no error showed. I can turn on/off and read correct voltages from the card in base machine. After creating executables, I can turn on/off the card, but got wrong voltages in target machine.
I've installed AccessHW in both machines and copied AccessHW.dll and cvirte.dll to system32 folder and the folder same with executables. I also tried installer with port support and serial support checked.
Windows XP is in both machines and LV 7 in base machine. I use "Output Byte to Port.vi" and "Input Byte from Port.vi" in AccessHW lib.
One thing I observe is initiation. The card manufacturer provides a program with same functions. After running their program, the voltage readings from the executables become correct. The readings remain good after closing their program. I close the executables and run the executables again and still see good results unless restarting the target machine.
Any solution for the problem? Thanks in advance!

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How to run stand alone executables developed with different versions of LabView on the same system

I am using LabVIEW 8.2 to develop a stand alone executable for a target system. The target system already has a stand alone executable written by another vendor, using LabVIEW 7.1. I installed the LV RunTime Engine for 8.2 which left the 7.1 engine intact (as it should). The problem I am now having is that the drivers installed on the target system are incompatible with the NI-DMM vi's that I am using. My concern is that if I replace the old drivers with the ones I am using on my development platform I may end up breaking the old software. What would be an appropriate work around to ensure that the target system will be able to run both executables? (FWIW the system will NOT be running both executables concurrently.)
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Thanks for sharing your issue with the community. I am struggling to see what you mean by "break the software." If you only have the two executables and LV Run-Time versions 8.2 & 7.1, then you just need to go to http://www.ni.com/support/ » Drivers and Updates » Search within Results: » enter "NI-DMM" » GO to get the DMM driver you need. To see the driver you were using on the development machine, just go to Measurement & Automation Explorer (MAX). The DMM driver should also automatically install DAQmx, NI-VISA, and NI-IVI, fyi.
Best wishes to you, and please let us know if that does not solve your problem.
Regards,
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How can I allow a sub-vi to run independent of the main program once it has been called while still sending data to the sub-vi

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nobuto wrote:
> I want to transfer data through the serial port in the same coding
> that hyperterminal uses. How can i do it?
>
> The serial port seems to be working, and labview seems to be sending
> the data, but the problem is in which format does it send the data,
> because in hyperterminal i just input the string "JDX" and it sends it
> to my device, with labview it sends something but my device does not
> recognize it.
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ate/bits/parity etc in
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Follow or contact me at...
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Why does this loop used to write values to the parallel port keep going forever?

Have a look at this VI guys. I'm trying to send a sequence of bits (used to trigger an IC). I'm interested in the last bit of the data port (D0). so I'm sending either 0 or 1 to that pin to trigger the IC. it works, but the problem is that the loop keeps going forever and i cant control it. if i send 3 to the loop count, I'm expecting to get: 1 0 1 0 1 0, but it doesnt stop and keeps going forever.
It seems that the problem is not with the loop. because i deleted the loop and just left the flat sequence so that it executes only once, but still it keeps repeating. How can i make the flat sequence execute only once?
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If anybody has an alternative or better method to send the bits to the parallel port, I'd be very thankful.Message Edited by krayzie on 05-14-2005 04:33 PM
Attachments:
pport.vi ‏24 KB

It works just fine here. Place an indicator to the iteration terminal [i] to watch how things progress. Do the number ever increase above N-1 to what you wire to N? I don't think so!
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Thanks Brian.
Well here is the next problem. I got a VI (attatched) off ni.com and it works fine on a windows98 platform. But quits working on NT.
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Pari.
Attachments:
parallelPortSwitcher.vi ‏124 KB

How can I use the parallel port as an input channel to communicate with a SPECTROMETER?

Hello,
The sensing system we use is called: FieldSpec Pro from www.asdi.com.
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Dennis,
I appreciate your time.
I have asked the copmany for such infos, but it seems to be confidential.
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Dennis Knutson wrote:
About all that tells me is
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How can i use the parallel port

I was wondering how to adress my PC´s
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[email protected] (Helmut Hullen) wrote:
>Hallo, Holger,>>Du meintest am 29.07.00 zum Thema how can i use the parallel
port>> I was wondering how to adress my PC's>> parallel port. I did'nt
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Windows NT/Windows 2000 you need a special library for direct port >access,
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Using stand alone executables to send data to the parallel port

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