Output broken for writing DAQmx

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• Method to check the VISA resources is ready for writing.

  Dear Forum, I have a piece of equipment that I connect to LabView via serial. The companion of the Instrument is of course completely useless, which fails for inexplicable reasons, but everything works perfectly in hyperterminal.

  When I try to adapt the example "basic series write and Read.vi" at my request, the implementation is very simple. However, it does not work despite working in hyperterminal. After a bit of investigation, I have determined that the problem is that after "VISA set up Serial Port" port is not * actually * available for writing quite yet, most likely because it is a very old computer.

  By inserting a delay between the "VISA set up Serial Port" and the "VISA Write" I am able to get the program works as expected 100% of the time. However, it is a very bad solution, because this long delay can be totally useless and performance on the computer to an end user (which may be much better than this one). Especially because this piece of equipment has 8 analog inputs, 8 analog outputs, 4 relay, 20 outputs 24VDC, 8 DIOs and 3 ports RS232 passthrough so it communicates a lot of data.

  Is there a function I can use to * guarantee * that the COM port is really ready for writing? If I could do this, then it can return almost immediately on a fast computer, while leaving enough time for computers slower finish opening the port. It may well be something that happens on the side of the pilot of the command windows open port.

  It comes to LabView 8.20 running on a Windows XP in VirtualBox on Linux host. Please don't just tell me that I shouldn't use virtualized Windows, I am sure that this problem occurs for the disabled of old material as well as it is the only significant in terms of series API difference. The virtualized instance is only likely to be more slow material dealing with than it would be otherwise.

  You can get information on the creation of an Instrument Driver Networkdriver.

  If your instrument does not return an ID and you can not do a reset, then obviously your initialize function would not code for this. Having the code that defines the instrument on certain default configuration is common.

  I don't know how this driver is intended to be used. Do you want that he NOR certified. The driver needs to be distributed outside of your company? It seems that the problem with your com port is unique to your pc and the installation program. How many times this would appear to other users?

• The GT630 that came with my HP h8 - 1360t output VGA for my HP w2007 monitor?

  I did research on this issue since about an hour and have not found an answer 'solid '.  There is no VGA/DB15 port on my video card and NVIDIA site presents DB15 ports when their 630 s.

  So I ask

  1. Why are there no DB15 port on my card?
  2. The GT630 that came with my HP h8 - 1360t output VGA for my HP w2007 monitor?
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  5. I have the NVIDIA GT 630 or 630 GT OEM?

  Thank you in advance for you help.

  With the help of a PC HP HPE h8 - 1360t, monitor HP w2007, Win 7 and I am very grateful!

  Thank you for the updated information.  Unfortunately, I can't say that the OEM version will allow the adapter VGA to add or not.  I have found no information about this issue and I don't have access to a review and provide a precise answer.  If someone has done this, feel free to chime.

  About the add-in VGA, remember that the back plate will have a slot for him as well. Personally, I do not recommend physically modding any component due to the concern about security.  You might want to consider the limited warranty.

  The big problem, as you will encounter, but most computers use DVI - D.  VGA is purely analog and DVI - D is only digital.  Most PCs now use DVI - D, which will not work with a simple DVI - VGA adapter.  The converters that would a DVI - D to work with VGA are generally expensive (even more than a DVI KVM switch).  There are DVI - D to VGA adapters that work, but they are rare and usually not specified.   It'll be cheaper to start with a DVI - D to VGA (provided that the DVI port is DVI - D).  This claims to be a DVI - D to VGA.  Base don this siteand the image, the adapter doesn't seem to be an adapter DVI - D dual link would work.  However, some reviewed said that he is in reality a DVI - I adapter that would work for this scenario unless the video card's DVI - I instead.

  The following options would be to use a KVM DVI switch or upgrade the monitor.  From my research, it seems that he had options in two similar categories in the price.

• LabVIEW does not support for NI-DAQmx.

  Hello fellow programmers.

  I am an absolute beginner with LabVIEW and I have the problem that even if I installed the latest versions of the NOR-DAQmx (9.7.5) driver and LabVIEW (2013) I get the error message "LabVIEW does not support for NOR-DAQmx. Please reinstall.

  I created a task in the NOT-MAX. According to the tutorial now there should be an element in LabVIEW under "Measure i/o", but it is not. I carried the task via drag & drop in the block diagram, but when I want to turn in code, I get the above message.

  Operating system: Windows XP SP3

  Any suggestions?

  Thanks in advance

  Laura

  crossrulz,

  Thank you for your response. Well, I installed the latest version of NOR-DAQmx (9.8) and this time I also installed packages for the former executives etc and now it works.

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• PXI-6133 Pulse frequency output and input with DAQmx

  I am trying to set a pulse meter output frequency task and read this signal with a frequency counter input task input pulses.  I use a 2 PXI-6133, each connected to a BNC-2090 case has.  I want to output a square of a certain frequency with the task frequency meter pulse output and then read the frequency of this signal using a task of cost input frequency.  I don't know how to property set up these tasks, or how to define which device to use for each heap.  I don't know what terminals on the BNC-2090 is the counter of entry/sortient channels correspond to them because that is not displayed in the documentation of the PXI-6133 or documentation of BNC-2090.

  Please see the attached VI for my attempt to put this in place.  Currently, I get two errors:

  (1) error-200452 took place at the property Node DAQmx channel meter Test - referred to as property is not supported by the device or is not applicable to the task.

  2. the error-89136 at DAQmx Start Task - specified route cannot be met because the hardware does not support.

  If I remove two channels of property DAQmx where I try to put the terminals for the counters, while the program is running, but then I know not what terminals on the BNC-2090 meters are connected to!  This causes the DAQmx read for the cost in the tasks of frequency to timeout because it does not detect a signal.

  I would really appreciate the help to properly configure these tasks and determine what terminals on the BNC-2090 case has the task of counter will work on.

  I see a few problems in the code originally:

  1. For your CI task, you type is defined as a counter entry > frequency.  But on the node property of DAQmx channel for this task, you modify the CI. Property of PulseWidth.Term.  It should be CI. Freq.Term. set the entry regardless of the PFI line you do not want the input signal on.  Tip: you don't have to type the name of the device in at all.  Enter "PFI0", it's the same as "DevN/PFI0" since the unit has already been specified in the DAQmx Virtual Channel Create function.  The name of the device, leaving aside will make your code more flexible where you decide later to change the name of the device.
  
  
  2. Maps of the S series, such as the 6133, do not have the same flexibility to change the output terminals of tasks of meter you might find with M or X series device.  Page 83 of the S series manual watch what signals can be extracted to PFI lines - Ctr0Out is not one of these.  Instead, Ctr0 out is, by default, pin 2.  Cabling to a BNC-2090 6133 is certainly difficult to understand out (probably because the 2090 was designed to work with the materials of the E and M series), but if you compare the pinout of a PXI-6255 0 with the 6133 pinout connector, you will notice that they are essentially a match 1-1.  Pin 2 is PFI12 on the 6255, so I assume the same for the 6133.  All this to say, Ctr0Out always appears on the pin 2/PFI12 for the 6133 and you therefore cannot change the output terminal that your code is trying to do, having for result error-89136.  Remove this node from the property altogether and the error should disappear.

• Back table of outputs digital for all available hardware

  Hi, I use an output digital on the USB-6008 box to toggle a switch to relay.  The problem is that the State is initialized from the all the outputs for this device is high when the unit is first powered.  So, I include in my code to set the digital line (saved in the config file) solenoid low when the program first runs.  The real problem is that the first time that the program works on other computers, depending on the hardware installed, the line can have a different name.

  Is there a way to return an array of all available digital output lines, so that I can put all weak when my program works first?  One of these lines will be the one I really want to put down.

  Thank you

  Greg

  Dig in the DAQmx palletes for nodes and constants to find a node 'system '. Select the "DevNames.

  Wire as arry in a loop with a node For "Device" and you can choose the "product Type" or "product number".

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• Waveform output n-times with DAQmx screws

  Hello

  I want to output to an analog waveform 1 d a specified number of times.

  The problem is that I am converting a Labview 7.1 to 9 Labview program.  To do this, the Legacy DAQ screws must be replaced with modern versions of DAQmx.

  The old 'AO Start' VI allowed the user over the "number of iterations of the buffer" and it would simply exit the waveform given that several times.

  There seems to be no way to do this with the new DAQmx screws?

  Other people have said:

  "To produce an n-time waveform, simply call the VI"DAQmx Start Task"that many times."

  This won't work, as long as the task is stopped before trying again - HOWEVER, this is not the service I need for the following reason:

  -There is a delay between the end of the output waveform and the beginning of the next iteration of this waveform, in the order of 15 ms.  It is unacceptable, there should be no delay.

  "A form of continuous output, just wave wire wish all waveform to the 'DAQmx write" VI".

  It is also unacceptable that I went out on four-lane 1 MHz, with iterations of waveform more than 100.

  Does anyone know how to produce a waveform of 1 d n-times without the problems mentioned above?

  Thanks in advance,

  Chris.

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  The best way to get the functionality that you are looking for must first consider the size of your waveform.  Let's say for example it is 1000 samples.  If you want to generate this amount of waveform a N cycles, should perform a simple calculation to take the size of waveform table times the number of iterations, and set up a finished task of output to the output as many samples.  So let say we want to exit 20 cycles of our sample of 1,000 signals, we would put up a VI of Timing DAQmx for finite samples, and samples per channel at the output of the task must be 20,000 samples.  Thus, you generate continuous 20 cycles of your waveform before going out and turning off the task.

  We will find a good example of base from here, make over, change the waveform to VI to your real table and set the terminal of samples per channel to the amount calculated in the way I did above.

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