PXI-4351 and DAQmx?

Hello,
We are considering to buy a PXI-Chassis with an PXI-6229 for general measurement and two PXI-4351 for temperatur measurements.
I already wrote a big library of VIs to use PCI and PXI-card undere DAQmx (almost 6 months of development).
But I read in the specification of the PXI-4351 that this card is only supported by the traditional DAQ driver.
Is it true, are may be the DAQmx 8.1 support the PXI-4351. If not, does anybody know if the card will be soon part of the DAQmx?
Thanks,
Risotto

Risotto,
the PXI-4351 works quite differently than a multifunction DAQ device and it comes with it's own instrument driver which is based on traditional NI-DAQ. The instrument driver was just updated to support LV 8. There are currently no plans to support NI-435x devices with NI-DAQmx
Best regards,
Jochen Klier
National Instruments Germany

Similar Messages

URGENT: PXI-1033 and DAQmx problem

I bought new laptop with Express Card slot Dell Inspiron 6400. I have PXI-1033 with integrated MXI bridge, Express Card 8360 and PXI-modules: PXI-6251, 6115, 5114 and 4071. I installed drivers 8.3 and plugged in PXI modules into PXI-1033. I first power up PXI-1033 and than power up laptop (with Express Card in it). Laptop can not start, again can not, blue window, and at last start. In MAX is listed PXI chassis with bridge and all modules, but mx is not listed and I can not use it from LabVIEW. What is the problem?

Hi,
To clarify, do the PXI modules show up under DAQmx devices? What color is the Link LED on the 1033? Do the cards all show up in Windows Device Manager correctly? Also, are you able to power on the laptop successfully now every time, or does is have trouble booting each time you try and start it up?
Have you inspected the MXI cable for bent pins or any visible damage?
Thanks!
Adam W
Applications Engineering
National Instruments

How to control a solenoid via PXI-2520 and DaqMx Switch

I am a LabView novice with Core 1 and Core 2 training so I am familiar with the fundamentals of LV process flow however, this is the first application I am attempting to develop that is not a simulated training VI. That said, I am having trouble ironing out the necessary logic to control a 10 solenoid 2 position valve manifold. I have developed a VI that will contact and disconnect a particular relay in the style of the "Switch Controlling Individual Relay.VI" on my PXI-2520 module but these are single instance events. Ie. i set the device, name the relay, and tell the VI which action (make or break) and run the VI. What I am trying to develop is a continuously running VI where any one or multiple solenoids can be energized/de-energized using simple boolean control whereby each relay is represented by a switch on the front panel.
It is clear that a while loop is necessary and a series of case structures or State Machine architecture is necessary but all my attempts have been fruitless. the common failure mode tends to be when following iterations of the while loop tell a switch that is already open to reopen or vise versa thereby causing an error. My thought here ist that some feedback from a former iteration is necessary so that only "unequal" boolean values for the former iteration calls a case to connect/disconnect. What are your thoughts?
Eventually this VI will also need to control these solenoids automatically (i think DaqMx Create scan list with software triggers will suffice) but each action willl need to be timed. For now though it is most critical that I have the capability of operating the solenoids manually and dynamically.
Thankyou,
DK01

Welcome to the forums!
If you can, please post a snippet of code from what you've attempted so far. We can take a look at it and make some recommendations.
One of the lessons in Core 1 also talked about the use of the event structure. It may be a good use case for an event driven state machine that can modify the states of specific switches.
Nathan M.
Applications Engineer
National Instruments

Temperatures corresponding to voltage ranges with the PXI-4351/TC-2190

Using a PXI-4351 and TC-2190 with a K-type thermocouple, what temperature range do the voltages (+/- 625 mV, 1.25 V, 2.5 V, 3.75 V, 7.5 V, and 15 V) correspond to? How much accuracy does each different range of voltages have? All I could find was that to get improved accuracy, use a range of 2.5 volts or less (document #1X0F7L3E). Also, will using several channels at vasly different temperatures (ie. room temp. and several hundred degrees) affect which range I should select?

The full temperature range of a K type thermocouple from -270C to 1370C represents a voltage range from -6.45mV to 54.8mV. If the only sensors you are using are thermocouples then you should choose the smallest range. The 4351 applies one gain setting to all channels, so the only reason you would want to use anything but the smallest range would be if you have other types of sensors with larger voltage swings. You can find voltages for any thermocouple at any temperature at the link below.
Regards,
Brent R.
Applications Engineer
National Instruments
http://srdata.nist.gov/its90/menu/menu.html

Can I use SH68-68S cable with PXI-4351?

I'm trying to figure out which cables are actually compatible with PXI-4351 and TC-2190
Will a SH68-68S work?
thanks!

Hey Grocket,
I apologize for the delay in any response.
It appears that the TC 2190 is only compatible with the SH68-68 cable. The product manual only suggests using that cable.
The SH68-68-S is only compatible with TBX-68S, CB-68LP, and NI 2501/NI 2503.
Let us know if there is anything else we can clarify for you!
Happy Holidays!
J Newk
Systems Engineer
National Instruments

I got Internal Software Error -223044 with my PXI-4472, PXI-1033 and NI expresscard-8360 DaqMx 8.8

When i running the self test of the board in MAX i got error -223044, anyone that has some ideas??
STALT

Hey Stalt,
This particular internal error begs me ask a few questions.
1) Has this 4472 ever been used with DAQmx?
2) How old is this 4472? When was it bought from NI? Can you give me the revision letter of the board? That is found by looking for a number printed on the board that usually begins with "ASSY", then there are several other numbers/letters, but the one letter I care about is the letter right before the "-" So it would look like ASSY11111111E-01 so the revision would be "E"
3) Do you have another PXI system (with DAQmx) that you can initialize this 4472 in?
Let me know
-gaving
Software Engineer
National Instruments

Cannot detect channels of PXI 4351

Hi there. I am new with labview and also the NI products. I just got myself a PXI 1042 controller with PXI 4351 card. I got to know that DAQmx can't be used to program the labview. I am using labview 8.2.
I can detect the card under DAQ traditional in MAX. How do I assign the channels in Labview 8.2? I can see the DAQ traditional in the Instrument I/O, but I dont know how to go about assigning the channels. I am only trained in DAQmx and I can't find any samples in the using traditional DAQ in 8.2.
Please help

Duplicate post

Cannot detect PXI 4351 channels

Hi there. I am new with labview and also the NI products. I just got myself a PXI 1042 controller with PXI 4351 card. I got to know that DAQmx can't be used to program the labview. I am using labview 8.2.
I can detect the card under DAQ traditional in MAX. How do I assign the channels in Labview 8.2? I can see the DAQ traditional in the Instrument I/O, but I dont know how to go about assigning the channels. I am only trained in DAQmx and I can't find any samples in the using traditional DAQ in 8.2.
Please help.

Have you installed Traditional (Legacy) NI-DAQ 7.4.2 from the LabVIEW driver CD??
If you have, the Traditional DAQ example VI's will show up in Find Examples>>Hardware input output>>Traditional DAQ>> Analog Input folder
Also, once you have installed the required Traditional DAQ device driver you can refer to this example code
Hope this helps
Regards,
Dev

AI Buffer Read Problem with PXI-4351

I have a PXI-8105 controller in a PXI-1045
chassis with labview 8.2 installed. I would like to use a PXI-4351
board to measure a thermistor. I am using the sample vi on the ni web page http://zone.ni.com/devzone/cda/epd/p/id/838, but I get an error code -10846 "AI buffer read" after a few acquistions. I am new to Lab view --- what does this mean and how do I fix it?

Well, I don't have ready access to a LV PC and for some very odd reason, my attempt to search for "error code" (and even just plain "error") on the ni website returned 0 hits?!? Strange...
Anyhow, I'll take a guess and offer you an idea for a workaround. Could your error mean that your call to AI Buffer Read times out before the requested # samples have been taken? This kind of error wouldn't be surprising as it's difficult to determine a reasonable timeout value. Based on my own past experience with a 4351 board, I'd say that the whole notion of "sample rate" turns into something of an odd duck.
As I recall, all you can specify is a filter frequency which will establish a ceiling for your actual sample rate. However, the board also has some sort of criteria for signal stability. If you have several different channels to measure which use different input ranges, your actual sample rate can be reduced pretty dramatically. So you might get a few samples per second or a few seconds per sample.
The workaround I used was to always request data that had already been collected and was immediately available. One of the inputs to the AI Buffer Read lets you set some parameters where you can specify that you want to read the most recent sample that's already in the buffer. Granted, this may represent a temperature from a second or two ago, but this lag is not necessarily a major issue for temperature measurements.
Note: in my app, I could query for Temperature any time I wanted, as frequently as I wanted. I would always get data back, but there was no guarantee that I'd get *unique* data back. In other words, if I called it 10 times in a tight loop, I might get the exact same sample # back each of those 10 times.
-Kevin P.

PXI 4070 use DAQmx Drivers

I have replaced a PXI 4060 card with a PXI 4070 card in a PXI 1042 chassis that I use for resistance measurements. I want to use DAQmx drivers instead of the traditional daq drivers. How can I do this?
My controlling software is VB6. I have had issues with traditional daq on Windows XP machines with new NI installations. Errors indicate there is an issue with the traditional daq drivers. The sample applications installed with the niDMM 2.7 installation error with message "Error Loading Driver Module". I have used the palbase utility in the past to work around this issue, however, the palbase utility is not failing to change the base address. There is an error message associated with the failure, but I figure I may save myself the headache by switching to DAQmx drivers.

I would recommend upgrading to the niDMM 3.0.4 drivers found here. This version is still compatible with Visual Basic 6.0 and Windows XP. niDMM 2.7 would have installed NI-DAQ 8.5. The name indicates that it is traditional DAQ, but as far as I can tell, version 8.5 was only DAQmx. 3.0.4 will also install a newer version of DAQmx that is compatible with XP, as well as the examples. It seems that the version you have should have worked, but there may be some corruption, or there may have been a version of traditional DAQ 8.5 at some time (we had some versions of NI-DAQ that included both traditional DAQ and DAQmx). I hope this helps!
Thanks,
Sean
Applications Engineering Specialist - Semiconductor Test
National Instruments

TC measurements with PXI 4351 DAQ Card

(I am using version 6i of LabVIEW). I am trying to create a VI that will use a PXI 4351 Card with a TBX-68T to take 4 thermocouple continuous measurements. I am also acquiring 8 voltages with a 6030E and TBX-68 and writing them to a file. My voltage data acquisition is modeled after "Buffered Continuous Analog Input.vi" I would like to aquire voltages and temperatures in the same vi, but using different devices and accessories. (I need a higher frequency for the voltage acquisition, and more precision with the temperatures). Is there a subvi I can use to collect the temperature data in the same vi as my voltage? I don't want the thermocouple DAQ to interfere with the voltage DAQ, either.
I tried the NI435x thermocouple.vi
but I couldn't get the Built-in Cold Junction Sensor to work or figure out how to combine it with my exisiting voltage acquisition. I also got NaN for my readings, and I checked the wire connections in all the sub vi's as suggested by another solution.
Any comments would be great. Thanks in advance.

Claudia-
Thanks for the response.
Regarding the CJC- When I switch it on, the temperature readings I get are very random, roughly negative 1 degrees. (I am operating right now at room temperature, and will be using J-type TC's to measure ~43 degrees C). Also, when I use the built-in CJC, the aquisition rate seems to slow down considerably. When I use the "user specified" everything seems to be ok, including the aquisition rate.
I measured the resitance of the Thermistor on the TBX-68T and it was about 5000 Ohms, as expected.
Just to make sure: When using the TBX-68T, do I need to hard-wire a thermocouple to Channel 1/auto-zero and another to channel 0/CJC? Because I connected a TC to channel 0 right now, but I wasn't 100%
sure.
I've attached my main vi and two sub vi's that I am using for the voltage aquisition part of my project. (Note:the current measurements are just voltage measurements multiplied by the recipricol of the resistance it was measured across, ie. 10).
I would like to keep this file as is because it writes to a file exactly the way I want it to. I'd like to have the temperature aquisition with the 4351 in the same vi as the 6030E so that they both stop and start at the same time. I am just not sure how and where to log the temperature data since there will be fewer data points than the voltage data. Any suggestions? Should I write two separate files? can I somehow append them?
Thanks again. Hope to here from you soon.
Attachments:
EBlackMainDAQ.vi ‏107 KB
Save_Data8.vi ‏45 KB
Build_String_Array5.vi ‏33 KB

Synchronizing x-series pxie 6358 and 6363

Hi,
I have 2 pieces of PXIe-6358 at the moment and planning to extend the kit by 3 pieces of PXIe-6363 and to perform HW-timed analog readings on all devices synchronously.
Using all AI channels of the PXIe-6363s, the max. sampling freq. is going to be 31.25 kHz I guess. Thus the sampling freq. of the PXIe-6358s have to be set to 31.25 kHz as well. To enforce the synchronisation with low jitter I think all sample clocks should be tied to a reference clock - OnBoardClock for example. The question is: how can I synchronise these X-series cards to a same reference clock and to the same frequency? Can somebody please suggest how it is done efficiently.
Thanks,
Krivan

Synchronizing DSA, S Series, and X Series Devices With a Single NI-DAQmx Task
NI-STC3 Timing and Synchronization Technology
Synchronization Explained
Christian

NI PXI 4351 read temperature

Hi,
I'm trying to read temperature from TBX-68T connected to NI PXI-4351.
I see PXI-4351 in my hardware explorer, it show me right data in test panel.
But, I can't found any tools for reading temperature in LabView!
I installed drivers for NI PXI 4351
http://joule.ni.com/nidu/cds/view/p/id/285/lang/en
but still noresults. Driver didn't contain any examples for reading.
I use LabView 10 and I have NI DAQ Traditional 7.4.4
so, I confused. How read temperature?

JaredRo wrote:
Hi kmcdevitt,
The SC Express product family was specifically designed to take advantage of the PXIe architecture and therefore the timing circuitry on the PXIe-4353 is not designed to be compatible with the PXI platform. There are no plans to design any of the SC Express products in the PXI form factor.
Jared,
Please explain what it is that makes the PXIe-4353 so special that there can not be a PXI-4353.
This 32-Channel, 24-Bit, Thermocouple Input Module does 90 S/s/ch sample rate in high-speed mode or 1 S/s/ch sample rate in high-resolution mode. Surely you are not claming the the PXI platform's architecture and timing circuitry can not hadle the troughput generated by the 32 channels of 24bit data at 90Hz.
Jared, it is not a pleasent fealing to be prommised that the new signal conditioning cards are going to be made for your soon to be purchased PXI-1045 chassises, and later find out from an Applications Engineer Jared that it has been in the plans to never make PXI versions of signal conditioning cards. How would you feel if you purchased about 30 PXI-1045 18 slot chassises with PXI Embedded RT controllers with the promiss that if you bought the controllers and chassises that NI would continue to develope new Signal Conditioning and Other PXI Cards for your chassises. Just buy them, and the new PXI cards will come. How would you feel when you were told to be patient and just wait till next years NI week. How patient would you be after the second year of being told to be patient until the next year's NI week? How patient would you be after the third year of being told to be patient until the next year's NI week? I have been recently asked to be patient again. NI Week 2012, there may be something. And now you tell me that there will never be anything.
I just don't buy it that there is something about the PXIe architecture and therefore the timing circuitry that is required for 90 Hz data.
Kevin.

LLB for LV8.61 to work with sample VI PXI-4351

I use LV8.61 and installed driver for PXI-4351, NI435X v252.
While I try to use sample vi came with v252 (Measure Thermocouple (with Accessory).vi), I get error for
missing LLB, vilib\DAQ\MISC.LLB\Get DAQ Device Information.vi
Indeed I can not see \LabVIEW8.6\vi.lib\DAQ folder. How I get this LLB and needed update?

Sorry for my misunderstanding. Traditional DAQ was not installed.
In my control pannel, installed software list, within NI software, it showed TDAQ744 installed.
However, it was not. I installed TDAQ744 and sample vi worked.
Thanks for help.

PXI-4351 reading rate

Hello,
I'm using a 4351 board for RTD and thermocouple measurements. I've got a strange behaviour when activating "auto-zero at start" : the reading rate is higher than with no auto-zero at all. It looks like it was in "Fast" mode, although i leave the reading rate in "Slow" mode.
I'm using a pxi controler with labview RT 8.2.1 and 435x driver 2.5.2.
Any help would be very appreciated
regards
Ludos

Hello,
Thank for your answer.
In fact, the acquisition in "Slow" mode is not too slow, it just match the spec (p 2-4 of the NI 435x User Manual), witch is given with no auto-zero : 2.8 readings per second, to be divided by the number of channels.
With 5 chanel (+ 1 for CJC), the acquisition take approximately 2.15s in slow mode, no autozero => 2.8 readings/s
Activating Autozero per scan add 1 channel measurement (around 2.5 s => 2.8 readings/s).
Activating Autozero at start should impact only the first scan... but here, it take 0,7 for the whole scan => 8.6 readings/s. That's near from the Fast mode spec : 8.8 readings/s.
My config is a PXI-8106 RT controler with a PXI-4351. I'm Using Labview 8.2.1 with corresponding RT module. And the driver for the 4351 is ni435x 2.5.2 / traditional DAQ 7.4.4
Regards,
Ludos

PXI-4351 and DAQmx?

Similar Messages

Maybe you are looking for