Identification of a daq board

Hello all,
in a try to give the user some informations on the board included in a test system I tried using DAQmxGetDeviceAttribute to retrieve product and serial numbers, but got strange results!
On a brand new PCIe-6320, the product number retrieved by CVI is 1948632260 (or 0x7425C4C4), while the serial number is 24245542 (or 0x171F526 as reported by MAX).
How do these values map to respectively 781043-01 and HB5385464 which are listed on shipping documentation?
( I have found that 0x17... number near a barcode on the lable on the packaging, but as you know the box is normally thrown away one second after the equipment is received by the customer )
Proud to use LW/CVI from 3.1 on.
My contributions to the Developer Zone Community
If I have helped you, why not giving me a kudos?

Hello ebalci,
yes, I know product and serial number are different beasts but the problem is that values reported by both MAX and CVI functions are different from product number on catalogs and shipping documents, and retrieved serial number is different from shipping documents. So when I need assistance / repair on a board, which number do I have to report to NI personnel?
ebalci ha scritto:
Since the serial you get matches the one on the box, I would think they shipped it correctly
It' s bit different: the label on the box clearly states "S/N: HB5385464" which is different from the one shwn by MAX and CVI. In a different place there is an independent barcode and the number reported by both MAX and CVI, without any identification label: it could be some internal wharehousing code, as far as I can understand from the label!
Proud to use LW/CVI from 3.1 on.
My contributions to the Developer Zone Community
If I have helped you, why not giving me a kudos?

Similar Messages

How can I acquire data in a PCI DAQ board using a SCXI rack?

Hello.
I have an acquisition system that consists in:
· 3 PCI DAQ boards:
- PCI-MIO-16-E-1
- PCI-6052-E
- PCI-6034-E
· 3 cables to connect PCI boards and SCXI modules
· 1 SCXI chassis:
- SCXI-1001
· SCXI modules + terminal blocks:
- 4x SCXI_1121 + SCXI_1320 (for voltage analog inputs)
- 1x SCXI_1520 + SCXI_1314 (for strain gauges)
- 1x SCXI_1530 (for accelerometers)
I have been trying to acquire different signals (specially voltage signals that are easier to reproduce) but I haven't been able to do it. I can't read anything from MAX or LabView. I have tested the PCI boards with a SCB68 terminal block (without any SCXI component) and they work properly. Problems appear when I use the SCXI chassis and the SCXI modules. I don't know if there is a problem with the hardware or it is a wrong configuration.
I guess channels in the SCXI modules correspond to analog input channels in the PCI board they are connected to, but I don't know if I have to read data from analog input channels of the PCI boards or from SCXI channels that appear in MAX (I have tried both posibilities, but they don't seem to work).
I don't know if I have to use Differential, RSE or NRSE configuration. I have tried all of them. Sometimes I only read noise, sometimes signal is fixed in a limit value (maximum or minimum, it depends), sometimes it's fixed in a value near zero,... I have changed connections and configuration options so many times I can't exactly say when one thing or another happens.
I have tested only one PCI board with only a SCXI module in order to avoid interaction and confusion. Nothing.
I think I have tried changing almost every option in MAX, but it doesn't work.
I'm sure I'm missing something and solution is quite simple, but I can't find it.
Can anybody explain to me how to connect and configure my system to read any signal? I only need a few steps or highlights. Maybe some clues about what the problem can be.
Thanks!

I have several comments and suggestions:
A) Have you "added a device" in MAX and actually added the SCXI chassis? This step is necessary to get the chassis to work. Click on "add a device" and choose the 1001 chassis . Do this for one DAQ card and one module only initially. The Set Up wizard should walk you through the configuration. If you are unable to add a chassis within MAX, I suspect the chassis is not working correctly.
B) Once configured, you can examine the SCXI channels in MAX as follows:
1) Open the DAQ card in MAX and Open the Test Panels
2) For the SCXI channel to view, use the following convention OB0!sc(n)!md(m)!ch where the letter (n) corresponds to the chassis number in MAX (usually = 1), the letter (m) corresponds to the module number (slot) where the module is located in the chassis, and (ch) represents the channel(or channels) you wish to view. So presuming chassis ID=1, and a module in slot 1, and you wish to view channel 3, you would type the following in the channel field for the DAQ card channel to view:
OB0!sc1!md1!3 (note OB0!sc1!md1!3:6 will display channels 3 through 6)
All of the SCXI channels for a given DAQ card are multiplexed through channel 0 of the DAQ card, Channels 1 and up are not used, hence the initial three characters in the SCXI call refer to "On-Board Channel 0 (OB0)"
C) For the subsequent set up, it will be necessary to first add the additional modules to the chassis (when powered off). Then open MAX and update the chassis. (If you get an error then simply delete the chassis reference in MAX and add a new chassis). You will then be required to set the interface mode of each module as either parallel or multiplexed. In parallel mode, you associate a distinct module with a distinct DAQ card in the host PC. For those DAQ cards that will address multiple modules, you must first configure the modules to be in adjacent slots in the chassis and then assign the first module to the cabled DAQ card - then all of the modules assigned to that DAQ card should be configured in "multiplexed" mode.
D) Once the chassis has been properly configured, you can click on each module and set the gains, filters, and terminal block types.
I hope that this helps to get you started.

DAQ board no longer showing up in MAX, nor elsewhere.

I can no longer see my DAQ board in MAX, nor LabVIEW 7.1. It's a PCI-6023E, which was working fine last week.
I tried reinstalling MAX through the Control Panel >> Add/Remove
Programs, but it is not there. In "Add/Remove Programs", II click on
"National Instruments Software", but that causes my computer to hang.
I tried downloading the latest NI-DAQ, but it thinks it has nothing to
install. I explicitly use it to remove LabVIEW 7.1 support, then
re-install it, but my DAQ board is still invisible.
How can I communicate with my DAQ board again?

Hello Bmihura,
There is a utility called MSIBlast that can be used to remove software
from your computer when the Add/Remove Programs does not work.
For future reference, it sounds like some portion of your National
Instruments software has become corrupted during an installation.
It is important to strictly follow installation procedures outlined at
http://www.ni.com/support/install/
. Also, if your device does
not show up in MAX, it probably is a result of an incorrect driver
installation, and not a problem with the MAX program.
The first thing you will want to do is remove the hardware from your
computer. Then, to get the MSIBlast utility, copy and paste the
following in an Internet Explorer web browser window:
ftp://ftp.ni.com/outgoing/
Find MSIBlast.exe and drag and drop it onto your desktop. To run
the utility, simply double-click on the executable. In the dialog
box, make sure you have 'Show NI Installers Only', and you should see
a list of National Instruments software installed on your
computer. Go through the list and select the components that you
wish to remove and click the 'Uninstall' button.
Once you have uninstalled all of the software that you could not
uninstall through Add/Remove Programs, restart your computer and verify
that everything was uninstalled through Add/Remove Programs. At
this point, if you chose to uninstall LabVIEW, that should be the first
thing to reinstall. Otherwise, go ahead and reinstall DAQmx
8.0. I would recommend re-downloading it from our website here
just in case the installer became corrupted during the download
process. After the driver is installed, now is the time to power
down your computer and physically install your hardware in a spare PCI
slot. When you restart your computer, Windows should recognize
new hardware and you should allow the wizard to install the driver
software automatically.
I hope this helps, and if you have any further questions you can either
reply to this post or directly contact an Applications Engineer by
calling 1-866-ASK-MYNI.
Regards,
Travis Gorkin
Applicaitons Engineering
National Instruments
www.ni.com/support

Connecting more than one sensor cable to screw terminal to collect more than one signal in single DAQ board channel?

I don't know if this topic is being posted in the correct location. I am new to LabVIEW and the hardware associated with it. I am using an NI 9237 DAQ board for a senior design project in engineering and I was informed that I can make multiple connections to a single screw terminal which in turn will connect to one channel of the DAQ board. To give the specifics, I have two pressure transducers and would like to connect them to the same screw terminal and channel on the DAQ board yet separate them when acquiring data in the VI. Does anyone know how to do this? I know is is essentially knowing what pins do what on the screw terminal but I can't find this anywhere. I am currently doing the job with two screw terminals and two of everything else (RJ50 adapters, etc.). I would appreciate any input. Also, please let me know if I am posting in the wrong board and if possible, which board I should be posting to.
Thank You,
bsteinma

bsteinma,
What you may have heard is that you can measure multiple signals on the same task, not on the same channel. By tying both of these signals to the same channel, both signals will compete to drive the line. The channel on the card will only interpret this garbled signal and you will get no useful data. If you are new to wiring up hardware, I recommend configuring a task within Measurement and Automation Explorer and then clicking on the tab along the bottom of the page titled, Connection Diagram. This will show you what electrical connections to make. Then, in LabVIEW you can read multiple signals (channels) and manipulate each signal how you would like.
As far as boards go, you will generally find an answer where ever you post, but the Multifunction DAQ board is a great place to post when you have questions regarding hardware (like your 9237).
Cole R
Applications Engineer
ColeR
Field Engineer

How do i read out the actual voltage range of the daq board as calculated by labview based on my input voltage range

I am somewhat new to DAQ so I hope I describe this well enough, but I have encountered a requirement for my VI that I am not sure how to obtain from LabVIEW. It is my understanding that when using a DAQ board (I'm using a PCI-6034 E) you can specify the voltage range you expect from your measurements, and then the software calculates the actual voltage range it will be measuring to ensure that you get the best resolution in your range that you can given the voltage step size, etc. of the equipment. I know how to extract the voltage input that I enter into the virtual channel, but I was wondering how I can extract the actual voltage range that the hardwar
e/software is using based on its own calculations from my input. Can anyone help me with this?

If I understand correctly, you want to retrieve the actual gain value (and, therefore, usable input range) used by your DAQ card for a particular measurement.
I think there's a good KnowledgeBase entry with your solution entitled "Programmatically Determining the Gain Used by a DAQ Device". Here's the URL:
http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/c93d3954ec02393c86256afe00057bb0?OpenDocument
Regards,
John Lum
National Instruments

I want to run my program with continuous aquisition and write data to file when a button is pressed and get the most recent samples from the DAQ board.

This is an update to a question I asked earlier. I am still trying to solve the problem. I have included a zip file with a library file. The file to open in pj_pushbutton.vi. I have placed comments explaining the issues and problems in this vi and the subvi's.
When I push my button to write the data to file I think it is writing the data that has already been stored in the buffer and writing to file all at once. I want the data that is taken from the DAQ board from the time that I press the Write File button. How do I do this?
Attachments:
pj_pushbutton.zip ‏692 KB

Hi,
1. In AI read, you need to set the Read/Search option to "Relative to End of Data".
2. Next you should not start AI Read VI until you press the Write to File. I am attaching an example VI below. Please see if it helps.
Regards,
Sastry V
applications Engineer
National Instruments
Attachments:
MostRecentAcquiredData.vi ‏97 KB

How to generate a pulse of 5 V -ve polarity in synchronisation with a 10 v input using PCI 6251 DAQ board

HI
I want to generate a 5V -ve polarity pulse to trigger my IEEE 1394 camera using an PCI 6251 (scb68 pin E) device, furthermore I am reading a standard Vsync signal from a SVGA port which is 10 v.
Now I want to synchronise the image capture of an IEEE 1394 camera with the Vsync signal so that camera is triggered to capture at every 4th Vsync signal (which is 50HZ.). Presently I am able to read the Vsync signal and also generate the -5 v signal But the Daq board generates a continues -5v signal while I want a 1 ms pulse (for every 4th Vsync).
Also this 5 v signal is generated even if the vi is stopped running.
Can anybody guide me so this problem can be solved.
Thanks a lot in advance
Shri

You can use the Write function, that is you can use the 10 volt signal as a trigger for the task, and when you get this trigger, the task starts and generate (writes) a waveform you defined in an array ("data", in the example).
Something like this..
DAQmxCreateTask("",&taskHandle);
DAQmxCreateAOVoltageChan (taskHandle, clokSource, your_sampling_freq, -10.0, 10.0,
DAQmx_Val_Volts, "");
DAQmxCfgSampClkTiming (taskHandle, clockSource, SAMPLING_RATE,
DAQmx_Val_Rising, DAQmx_Val_FiniteSamps,
samp_to_read);
DAQmxCfgAnlgEdgeStartTrig (taskHandle, input_channel, DAQmx_Val_RisingSlope, 9.0);
DAQmxWriteAnalogF64 (taskHandle, 1000, 0, 10.0,
DAQmx_Val_GroupByChannel, data, //data contain a pulse
&samp_per_channel, 0);
DAQmxStartTask(taskHandle);
// and then you create a loop....
For example you can specify data to be like this:
data[0] = -5;
for(i=1;i<1000; i++){
data[i] = 0;
Tell me if you need more help.....
bye

How to play a wave file through the DAQ board?

Hi there,
we want to play a wave file that is saved on the harddrive via the DAQ board. Means we want to connect a amp to the analog output of the DAQ to amplify the sound and play it through a speaker.
We couldn't find any VI that does that. Can anybody tell us how to play a wave file, or perhaps even send us a VI that can do that?
Thanks a lot for your help
Martin - Physical Optics Corporation

Hi Martin,
The only example that I could find on how to do this was using our
older Traditional DAQ drivers version 6.9.3. If you're using Traditional
DAQ drivers, the vi can be found here.
The example reads a 8-bit mono .wav file (an example .wav file is included in the .zip file) and writes it to the analog out of your DAQ card. I've updated the
example to work with our newer DAQmx drivers and attached it here.
I hope this helps,
Paul C.
Message Edited by Paul C. on 08-14-2007 05:47 PM
Attachments:
daqmx_wav_file_to_ao_output.zip ‏27 KB

DAQ Assistant in subvi not updating output to DAQ board with each call...

Hi All,
I am calling a simple subvi that creates a user-defined number of pulses with "Square Waveform.vi." This square wave (with the given total number of pulses) is then used as an input to a DAQ Assistant controlling an analog output signal on a NI USB-6259 DAQ board. I am using Labview 8.5 right now.
However, each time I call this subvi from my main program, the output I measure from the DAQ board is identical to whatever I set in the first call (i.e., if i created two pulses in the first call, I get two pulses on every call, regardless of the input I feed to the subvi). The multiple calls to this subvi are made in sequential frames in a stacked sequence. I believe stacked sequences are frowned upon by good labview people, right? But putting that aside for the moment...
The "#-of-pulses" input I give to the subvi is updated in a subvi front panel number indicator and a graph of this waveform. Just not in the real output I measure from the board. Why is the hardware output being asserted (with the original input value) before this new number can reach the DAQ Assistant?
The sloppy fix to this is just to put that square wave creation code in my main program each time I need it. This does work and fixes my problem. However, I would like to use subvis to keep things clean.
I am not a good Labview programmer, but have used this software for a number of projects and am stumped by this. Any ideas?
Thanks,
John

Hi John,
I am running your code over here and seeing
the same results. I believe the problem is that the DAQ Assistant is
being called inside a loop (really a sequence structure, but
nonetheless more than once). Sometimes it is difficult to troubleshoot
the DAQ Assistant in cases like this--it is trying to be "smart" and
seems to be avoiding re-configuring its parameters inside the loop.
This is intended to improve loop speed for when customers are
performing continuous operations. In this case, it is performing a
finite generation, and the number of samples generated appears to carry
over from one loop iteration to the other.
It sounds
like you have discovered one workaround for this already: putting a DAQ
Assistant in each frame of the main VI. Two other options that come to mind are:
Use the lower-level DAQmx functions inside
the sub VI. Here you will have explicit control over when the task is
created and cleared, and when parameters are set. You can find
examples of how to use the DAQmx API in the Example Finder at:
Help >> Find Examples... >> Hardware Input and Output >> DAQmx
Write
a consistent amount of samples to the DAQ assistant by "zero-padding"
your signal. For example, instead of writing [10, 1010], try writing
[1000, 1010]. In this case, it wouldn't need to reconfigure the number
of samples to generate.
One lesson to take away here is
that the DAQ Assistant is good for basic functionality, but for more
advanced control over the execution and configuration of your task you
should learn to use the lower-level DAQmx functions. In this case it
sounds like the problem is actually a bug. I'll file a bug report, since the DAQ
Assistant is not checking for waveform timing changes even though your
timing is set to Use
Waveform Timing.
Thank you for pointing out this odd
behavior--out of curiosity which version of DAQmx are you using?
-John
John Passiak

Do I need to buy a PGIA to utilize my basic multifunction DAQ board?

I was reading through the manual of the NI PCI6014 basic multifunction DAQ board. In the section connecting analog input, there were multiple references made to a PGIA. However, I could not locate it the connector pin diagram. I was wondering if it was an external device that I would have to purchase to enable me connect my analog input.

Greetings,
No, your NI 6014 contains the PGIA (programmable gain instrumentation amplifier). I think that Figure 3-1 (NI 6013/6014 Block Diagram) in the user manual for the NI 6014 may clear things up for you. It illustrates how all of the analog input channels (ACH0-ACH15) are multiplexed through the board's PGIA.
Good luck with your application.
Spencer S.

Does the academic version of Labview 8.5 allow running AT MIO 16e-1 DAQ board?

I just bought the academic version of Labview 8.5. I have an AT MIO 16E-1 DAQ board. I have installed the Labview software. Then I installed the Legacy NiDAQ 7.4. I put in the board and MAX recognizes it. Windows detects the board twice. The first time is installs automatically. The second time there is an error.
I can't find the instrument driver/VIs in the Labview functions pallette for the AT MIO board.
Thanks.

Hello Test11111,
In order to use Traditional NI-DAQ devices in LabVIEW you need to know the device number as given in the Measurement and Automation Explorer. Unlike the IMAQ or NI-DAQmx devices, Traditional NI-DAQ devices do not auto-populate in the channel controls or constants. The good news is that if the device shows up in MAX and the test panel works there then your device is working properly.
There are some Traditional NI-DAQ example VIs available through the NI Example Finder. To access these examples open LabVIEW and go to Help» Find Examples... Then in the top left select Directory Structure; the "daq" folder contains all of the Traditional NI-DAQ examples organized by device and function (analog, digital or counter I/O).
I hope this helps, and please post back if you're still having trouble.
Cheers,
Brooks

Measure Frequency of Digital Signal from DAQ-Board

I'm using a National Instruments DAQ board and I need to measure the
frequency of a digital signal from my data acquisition board.
I know the measure frequency.vi (In diagram - data acquisition -
counter), but i don´t understand yours implementation mainly in input
"counter". Because i don't understand the relationship of board channel (for
signal acquiring ) and the measure frequency.vi.
Thanks in advance,
[email protected]

Hi,
Attached is a vi which models your signal, and provides a way to measure the average frequency over a window of time. It converts the signal to a sequence of periods. I usually start with this approach because you can save the data in a much more compact form if your sampling rate is high. Obviously over a specified period of time, if there are no zero crossings the frequency is zero, so I was a little incoherent before. The real issue is the latency caused by averaging. Your frequency measurement is most accurate half your window size before the current time, so smaller windows give you more up to date measurements, but also more noisy. If you need the most up to date measurement, then you have to use the time since the last crossing which is the case where the frequency never goes to zero. That's probably not a realistic situation. If you needed less latency, you could use a prediction algorithm.
Also, there are a number of signal measuring and processing vi's that LV gives you, for instance pulse measurements that could be used to partially implement this or other approaches, but I normally steer clear of them unless they fit exactly due to having to convert back and forth to the waveform data type.
Have fun!
Attachments:
DigRandFreq.png ‏62 KB
DigitalRandomFreq.vi ‏34 KB

Interfacing LabView compatible DAQ board w/ third party DAQ boards

Dear NI-team and board-members,
In my current project I'm using a third party Direct Digital Controller which supports customizable Programmable Logic Control (PLC) via a graphical programming software. Therefore, I'm acquisitioning temperatures (etc.) from my miniature-HVAC application via physically attached and mounted sensors, connect them to a dedictaed analog input (0-10VDC typically) and in further assign the analog input to some selected PLC modules with the help of the graphical programming software, and finally after doing the computation (calculator block) or control (Proportional-Integral-Derivative block) I assign the resulting control signal to a dedicated analog output (typically 0-10VDC as well).
So far for the previous history, NOW I actually want to be able, to manipulate these analog values in a way, that I'm not interested in the physical acquisitioned value from my real-time operating equipment (e.g. temperature sensors), more than that, I'm interested in assigning a certain level (e.g. +5 VDC) to that dedicated analog input, which in turn would represent a temperature e.g. in this simple case (+5VDC) 50degF.
Now to the questions, can I possibly interface the physical ANALOG INPUT (0-10VDC) of my third party DDC unit, with the ANALOG OUTPUTS (0-10VDC) of a NI DAQ board? In that way, I'd be able and with some additional help of LabView to program time intervals, where I raise the voltage level every 5 minutes by 1VDC, and in turn can proceed with my intended purpose.
To sum that up, are there physical limitations (e.g. ground loops, damage equipment, shorting) connecting an analog output of one board, to the analog input of another board?
Also, which DAQ of NI might be best suited for my intended purpose, using a NI DAQ board for "simulating" temperature values (etc.) onto the analog inputs of another third party board.
Thank you,
Sandro

Hi Sandro,
If both boards are in the same computer I wouldn't be too worried about ground loops or damaging equipment. The ground reference to the AO board will be the same ground reference as the computer and AI board. You would have to check with the specs for your third party AI board to see what overvoltage protection it has and whether or not our AO board could give a voltage high enough to damage it.
I would suggest one of our AO boards to do the job. Depending on what kind of control and precision you want, we have static update boards available in PCI form. The static board will be cheaper but you are limited to software timed voltage updates (instead of clocked buffered waveform output).
http://sine.ni.com/apps/we/nioc.vp?cid=12550〈=US
I would suggest the AO board (PCI-67xx) instead of our M series multifunction boards because the AO boards have 8 or more output channels. The multifunction boards only have two output channels.
-Sal

How do I control DAQ boards under Linux using C (gcc)?

I need to control multifunction DAQ boards using C (gcc) under Linux/x86. What drivers/packages do I need to use?

Hi NEB,
You will need to download DAQmxBase 1.3.1 found here:
http://digital.ni.com/softlib.nsf/websearch/47D4C7DDD7C777C886256F230070A606?opendocument&node=132060_US
The readme file contains information about what kernels it has been tested on.
Thanks,
Sal

DAQ board for acquiring analog pulses

Hi. I'm using the USB-6251 DAQ board, and I'm trying to record analog Gaussian curve-ish pulses into LabVIEW. Except when there is a pulse, the analog input channel is at 0V. Right now, I've got the trigger working to start acquisition at the beginning of the pulse, but I can't figure out how to stop acquisition when the pulse is over. I've been using the DAQ Assistant, with an Analog Window start trigger, set at the range 10m to 10 V. Is that the right way to do it? I can't get any reference trigger to work to stop the acquisition however. It's set to acquire 5k inputs at 1 kHz and always goes for the full 5 seconds instead of stopping.
Thanks in advance for helping!

Not exactly. It's still picking up pulses separately, but it's including the empty space afterwards (as in, if the pulse lasts only 10 ms, it still acquires data for the full 1 second). Preferably, it would stop acquiring data when the voltage is outside the analog window.
I attached the VI as it is right now, with just a start trigger and no reference trigger. I'm unsure how to configure the reference trigger to have it stop the acquision once the voltage is outside the window again.
Thanks for your help!
Jeremy
Attachments:
DAQ integration.vi ‏90 KB

Identification of a daq board

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