USB 6009 and DAQmx Base Concerns

Hello,
I just received a USB-6009 multifunction DAQ device along with DAQmx Base for use on Windows XP with LabWindows/CVI ver 7.1. Both the 6009 and DAQmxBase are successfully installed however I have several questions, I hope I am missing something obvious:
1. The Task Configuration Utility is not needed for use with LabWindows/CVI? I believe I read this in the Getting Started Guide.
2. There is no function panel for the DAQmxBase functions? I even searched the installation CD and found no .fp files. So the only way to know what functions are available with DAQmxBase is to open the NIDAQmxBase.h file and search through the function prototypes? Then, to know what a function does it is necessary to open the C Function Reference Manual via the Windows Start button and search for the function name of interest?
3. When creating a digital input or output channel with DAQmxBaseCreateDIChan or DOChan is it only possible to setup a "channel" as an entire port? Is it not possible to setup a channel as a single input or output line? Similarly, once the channel is configured is it only possible to read or write an entire port with DAQmxBaseReadDigitalU8 or WriteDigitalU8? I was expecting something similar to the DIG_out_line function used in Traditional NI-DAQ where a board number, port number, line number and state are passed so that a signal output line can be set on or off.
Thanks in advance for the assistance,
- Aaron

Aaron T. wrote:
Hello, I just received a USB-6009 multifunction DAQ device along with DAQmx Base for use on Windows XP with LabWindows/CVI ver 7.1. Both the 6009 and DAQmxBase are successfully installed however I have several questions, I hope I am missing something obvious: 1. The Task Configuration Utility is not needed for use with LabWindows/CVI? I believe I read this in the Getting Started Guide.
**The Task Configuration Utility is not necessary, except that there is significant functionality missing from DAQmx Base but present in the utility. That includes a lot of what DAQmx calls "proerties", and includes things like the convert rate for AI scanning.
2. There is no function panel for the DAQmxBase functions? I even searched the installation CD and found no .fp files. So the only way to know what functions are available with DAQmxBase is to open the NIDAQmxBase.h file and search through the function prototypes? Then, to know what a function does it is necessary to open the C Function Reference Manual via the Windows Start button and search for the function name of interest?
**I don't use CVI so I don't know anything about this. It strikes me that even if you have such a panel reading the documentation is a good idea
3. When creating a digital input or output channel with DAQmxBaseCreateDIChan or DOChan is it only possible to setup a "channel" as an entire port? Is it not possible to setup a channel as a single input or output line? Similarly, once the channel is configured is it only possible to read or write an entire port with DAQmxBaseReadDigitalU8 or WriteDigitalU8? I was expecting something similar to the DIG_out_line function used in Traditional NI-DAQ where a board number, port number, line number and state are passed so that a signal output line can be set on or off.
**Well, the ReadMe file says that USB-6008/9 is supported with both Line I/O and Port I/O. On the other hand, the documentation for DAQmxBaseCreateDOChan and DAQmxBaseCreateDIChan say for the lineGrouping parameter, "Always pass DAQmx_Val_ChanForAllLines." So your question is a good one! Perhaps one of the NI engineers can comment on this.
- Aaron
Thanks in advance for the assistance,
John Weeks
WaveMetrics, Inc.
Phone (503) 620-3001
Fax (503) 620-6754
www.wavemetrics.com

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Attachments:
USB6009_TDMS.vi ‏25 KB

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I have just started monitoring this list and I have a few general questions. I apologize if they are kinda basic!
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WaveMetrics, Inc.
Phone (503) 620-3001
Fax (503) 620-6754
www.wavemetrics.com

Hi,
Welcome! This is definitely the right forum, so please let us know if you have any questions. You can also purchase one-on-one support from engineers at NI.com. Have a great day!
George

Usb 6009....mx base....and other musings

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Hi
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USB 6009 lock-ups?

Hello,
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See the thread
http://forums.ni.com/ni/board/message?board.id=250&message.id=13722
John Weeks
WaveMetrics, Inc.
Phone (503) 620-3001
Fax (503) 620-6754
www.wavemetrics.com

How to install drivers for Ni USb 6009

Hi
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Hi there,
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USB-6009 pulse train generation with digital output....

Hello!
I've bought a new USB NI-Card (USB-6009) and now I'm trying to adopt an old vi that uses traditional DAQ drivers. I wrote that vi for a PCI NI-Card (PCI-6024E), which has two counters to generate two pulse trains simultaneously. Now I've only one counter and that's why I'm searching for a good way to create pulse trains using a digital output! The pulse trains are both ranging between 100 Hz and 100 kHz.
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You can't do it with this low cost board. Both digital and analog outputs are software timed only. The analog out is rated at only 150 samples/sec and the digital is about the same. You can't even use one of the counters because it is not a hardware timed counter output. It is an event counter only as an input.

Separate sampling rate for two different channels for a USB-6009 daq

Hi,
I am using a USB-6009 and incorporating the 'daq assistant' to change the sample rate. I am trying to find a way to set the sampling rate to two unique values for two separate channels. I've tried setting up two daq assistants and adjusting the sample rate different for each channel, though this does not work. Is there any way to set the sample rate high for all channels then reduce the rate for a different channel - or an alternative? I would appreciate any input on this, thank you!
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Solved!
Go to Solution.

All tasks on a DAQ board that use a sampling clock must use the same clock. Therefore, you cannot have two tasks on the same DAQ board sample at different rates.
Alternatives would be:
1. to combine all of the channels into a single task and just accept the extra data
2. get an extra DAQ board to use in parallel
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines

How to recognize s-series daq card in DAQmx Base 2.0

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Thank you very much for the quick response.
The reason I explored DAQmx: I want to do RLP and DAQmx Base has a simpler interface and more examples for RLP.
The reason I want to go RLP instead of DAQmx is a long story.
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Summary of my configurations:
PIII, 700 MHz CPU, 512 MB RAM
PCI-6133 and PCI 6713, LabVIEW 7.0, and DAQmx 8.0
I also have PCI-6110 and PCI-6024E cards for comparison
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1) The difference between P3/700MHz computer and P4/3GHz computer is very small
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6024E   200/4            15.7 kHz                    17.36 kHz
6040E   250/4                                        18.9 kHz
6251   1000/4                                        23.0 kHz
6133   2500/1            13.8 kHz
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6024E    200/1           54.8 kHz
6110    5000/1           19.4 kHz
6133    2500/1           14.5 kHz
Simulated device          135 kHz
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6024E    10/1             132 kHz
6713   1000/1              38 kHz
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Help setting up USB 6009 for experiment

Hi,
I am a new LabVIEW user. I have purchased a USB 6009 and I need it to acquire data from a pair of electrodes and a differential pressure sensor. Below is a schematic of how I think everything should be hooked up. I just have some questions regarding the setup before I run my experiment.
I will be using the electrodes to measure voltage drop. However, I am wondering whether I need a ground reference connected to the bottom GND pin. This is because I will be operating the electrodes in the +/- 20 V range and according to the user guide, each pin has a maximum voltage of +/- 10 V with respect to GND. I assume this means that if the +ve electrode measures +15 V wrt to GND and the -ve electrode measures -5 V wrt to GND, the DAQ will provide a reading of 15 V instead of 20 V. So if I need a ground reference, what do I connect to the bottom GND pin?
During this experiment, I will also be collecting data from an Omega PX26-030DV differential pressure sensor, which has a maximum voltage output of 100 mV. It will be powered by a Circuit Specialists CSI3005T power supply at 10 VDC. I believe I have made the right connections, but do I also need to connect the terminal 4 GND on the DAQ to the power supply GND?

You definitely need grounds! The internal circuitry of the DAQ device is referenced to the DAQ Ground. Since the device is USB connected, the DAQ ground is also the computer ground. All grounds should be connected together, ideally on only one place to avoid ground loops.
1. On the 10 VDC power supply shown in your diagram what is the relationship of + and - to ground? The ideal situation for a strain gauge pressure transducer is +5 V and - 5 V because that reduces the nominal common mode voltage to zero. Regardless, there needs to be a reference connection between the power supply and AI GND.
2. What is the circuit (or equivalent circuit) to which the electrodes are connected? That also needs a reference connection to AI GND.
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4. The +/-10 V limit with respect to ground is absolute. You cannot have +15 V to ground on one electrode and - 5 V to ground on the other electrode and expect it to work. The only way a 20 V differential rangs is possible is with one signal at +10 V and the other at -10 V. A 15 V signal will not be measured accurately and could result in damage to the DAQ device.
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Lynn

USB-6009 Daqmx Base 3.3 Cannot creat 2 or more channels on Windows mobile 6

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Attachments:
diagramm.jpg ‏113 KB

Vital000,
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USB-6009, mac OS 10.6.8 and python

Hello!
I am using USB-6009 under mac OS 10.6.8 and python.
I am trying to run the following commmand:
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I get the following message
File "/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/nidaqmx/libnidaqmx.py", line 180, in CALL
AttributeError: 'NoneType' object has no attribute 'DAQmxCreateTask'
Any help would be very mch appreciated,
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j.

Hello Jamyamdy,
Honestly, I am not too sure about this, but were you able to acquire data before or is this your first trial?
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For Mac OS X and Linux users, download the NI-DAQmx Base driver software and program the USB-6009 with NI LabVIEW or C.
http://sine.ni.com/nips/cds/view/p/lang/en/nid/201987
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USB 6009 DAQmx Deployment

Hi.
I have created a 4 channel differential data logging scope with a NI USB-6009. I would like to deploy this 'easily' to many of my colegues. I have app builder and the ability to build apps, but I would like to include the correct drivers for the 6009 in with the installer (although I have selected NI_DAQmx Core Runtime and NI_DAQmx MAX config support).
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Hi Alec,
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