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LabView inline temperature integration

April 9, 2019, 4:26 pm
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Hello, 

I would like to know if it is possible to have in-line temperature integration while measuring data. Right now we are using LabView to measure the horse power, RPM, integrated power, and temperature on a lab scale Banbury rubber mixer. The application file is called bodytemp. The power is integrated in-line in units of kilowatt hours so I was hoping integrating temperature the same way wouldn't be too difficult or strange. For certain products that we use it is preferable to use temperature integration rather than power integration. If this topic is discussed already, let me know where since it is difficult to locate this topic when there are a couple meanings for the word integration and the meaning I am using is mathematical (area under curve), not programming related.

 

Thanks.

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Pressure Transducer Reading requirements

April 9, 2019, 7:05 pm
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Hello, totally new to using Labview and just starting to learn some of the ins and outs.  I currently have a lot of pressure transducers that have a 28v exitation voltage that are full bridged units which output 0-10v.  They are from Lord stellar tech.  I have a variety of NI modules for the cDAQ 9178 chassis and the ability to get whatever is best for this situation.  I am just wondering what would be the best way to acquire the data that I need.  I have an adjustable voltage supply but not sure what is the best module for this type of data. Thanks for the help

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Need help with logaritmic scale

April 9, 2019, 10:40 pm
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Hello,

 

I`m trying to plot a distrubition on a logaritmic scale(see image). How can I hide the first value(0.01) of X-Axis?

 

thanks Smiley Happy

 

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Label of FrontPanel controls have wrong size when added

April 10, 2019, 12:09 am
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Hey guys,

 

I remember that I had this issue quite a while ago, but I could not find any suitable solution again. My problem is, that somehow the default label font size and style has changed, and anytime I add a new control, I have to format the label font to its normal size.

I cannot find a solution how to reset this to normal styles. Do you have any ideas (see picture below)?

 

Button with large label 01.png

 

Thanks a lot in advance!

 

Best Regards

Jenso

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Hello I'm looking for the subroutine in labview with the same function of SendByte () in CVI

April 10, 2019, 12:55 am
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Hello,

For my experiment I use serial port Rs232 to communicate with the device.

I've the program to do that in CVI, in the CVI I use the command SendByte () but I can not find the same subroutine in Labview 2015, Do you have any suggestion?

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DACmx Channel: Signal Type Property Node

April 10, 2019, 1:51 am
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Hi,

 

I have created an array cluster, the cluster consisting of a string, DACmx channel selection menu and a boolean button.

 

The idea is that when user loads a plot, each plotname is populated into the array cluster.

The user then gets choose to which channel to output the waveforms

 

Generating the array cluster, I could do (block diagram below)

cluster.png

It is with the next step that I am struggling with.

As I could not find a way to list BOTH AO and DO is the dropdown menu, I thought of using the Channel: Signal Type Property Node to switch between the AO and DO list when the button is pressed.

 

So for example if the button in row 1 of the array is pressed, the channel selection in row 1 only changes from AO to DO.

 

Also as the last step how to then extract the channels selected by user from the array for to output the waveforms?

 

Kindly advise

Sherzaad

 

PS: I do realise that this method I'm proposing may be convoluted; so if there are simple more direct solutions they are of course welcomed! Smiley Happy 

 

 

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http://thefitnessvibes.com/

April 10, 2019, 2:59 am
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So this is purely from my experience. I have done a lot. I've counted macros for two years now and honestly I recommend everyone counting macros for at least six months of their life because then you're going to really be able to grasp a concept. Of. What what calories are in what and what you have been. You want me to believe how much overconsumption of carbs and fat that an underarm protein that everybody is. The Fitness Vibes You really don't realize how much you have been overeating your whole life until you start counting macros and then it all kind of makes sense as too high.

No wonder why I couldn't lose weight because I was eating two days worth of carbs in one meal. You know what I mean. So you're really you really it's really good to have a concept of what's in food. And because it's like how macros you have no idea.

 

http://thefitnessvibes.com/

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Can multiple versions of the Labview RT Engine co-exist transparently ?

April 10, 2019, 3:04 am
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Hi,

 

I have a PC which runs Teststand which only calls Labwindows\CVI functions, but no Labview calls.

The PC has various versions of the Labview RT Engine loaded. I intend to load another, more recent version of the RT Engine so that I can run a Labview .exe .

 

My questions are, is the process of finding the correct version of Labview RT Engine when the .exe is run transparent to the end user ?

 

Having run and closed one version of the Labview RT Engine could this then affect the version of Labview adapter used by Teststand later ? 

 

Also can a Labview .exe be run from a USB memory stick as a command line parameter to the Labview RT Engine also loaded on the stick ?

 

Regards,

 

Gary. 

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LabVIEW Multisim Co-Simulation

April 10, 2019, 3:06 am
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HI,

I'm attempting to design a ECG signal acquisition and processing vi. My thinking goes like this: the signal picked up by DAQmx should be fed through a Multisim circuit, then its output comes back to labview to be further processed. Can that be done using a Multisim circuit running in a vi? If it's possible, what would you suggest?

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Labview FPGA Compilation error

April 10, 2019, 3:06 am
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Hello to all members... I am using NI USRP-2940R and labview 2015 with windows 7 on desktop PC. I have installed labview compilation tools of Vivado 2014.4, Vivado 2013.4 and Xilinx ISE 14.7 as well. While compiling Labview FPGA VI, I am getting an error: (LabView FPGA: The compilation failed due to Xilinx error. Details: ERROR [Common 17-345] A valid license was not found for feature 'Synthesis' and/or device 'xc7k410t'. Please run the Vivado license Manager for assistance in determining which features and devices are licensed for your system............ while executing ''synth_design-top"ReallyLongUniqueName_ReallyLongUniqueName'' -part''xc7k410tffg900-2'' -mode out_of_context''.............) I have tried many solutions like re-installing compilation tools and repairing as well, but still error exists. I am badly stuck now and beginner in NI USRP. Your help will be appreciated. Thanks in advance
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Default SubVI created in DAQMx for digital output

April 10, 2019, 4:03 am
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I have a doubt regarding the SubVI generated while creating digital output lines from DAQ Asst (Image of the block diagram is attached). The subVI I am refering to is a data generating VI  which generated 0 and 1 state. Here I want DAQ to generate N sample at a given rate.

I did  understand the inner most "For loop" that generates a 2D array of 0 and 1.

What confuses me the most is the use of channels and digital lines separately. What I know is each digital line corresponds to one physical cahnnel. If I have N number of digital lines per channel, how to interpret.

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Labview issue.

April 10, 2019, 4:18 am
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Hi! Im begginer with labview and arduino. I am trying to make a project for my University with arduino uno. So, as you can see in the screenshot below, program doesnt run normally. Current goin only until there and cant get through to the loop. I also tried to make the circuit simple so I remove the loop but problem still there. Anyone any help? 

Thanks in advance.

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Re: Two Showstopper Bugs, and on minor one, in Windows 10

April 10, 2019, 2:00 am
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Hi

I have a simple FPGA program that compiles in cRIO without any problems, but I want to use the FPGA program on the NI 9144 EtherCAT Expansion Chassis in FPGA mode to NI PXIe 8135 (Code file attached). As you know there are some differences between programming the local FPGA and the FPGA for EtherCAT RIO, that must be used user-defined I/O variables (this paper).

For Compiling I did step by step as this paper said, we get successful processes, but after file generation complete we have an error (that attached). It shows that the file can not run in chassis. 

Please help me.

error.PNG

Regards. 

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convert from LV2017 to LV2016

April 10, 2019, 6:09 am
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Moved to Version Conversion board
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DAQmax read slow response

April 10, 2019, 6:20 am
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Hello all, I'm using cDAQ-9178, NI 9401,NI 9202 to control multiplexer and read analog signals. At the bottom while loop, when I select multiple channels multiple samples and 1D waveform, the plot waveform is responses very quickly to the sensor. However, if I choose multiple channels single sample and 1D DBL, and send to a for loop for calibration, the data responses very slowly to the sensor, a few seconds delays. Can anyone tell me what's the problem here? any solutions? Thank you very much. Attached is the VI.

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LabVIEW Error loading "nilvaiu.dll" . Invalid access to memory location.

April 10, 2019, 6:25 am
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I get the following message when I try to run a project that is accessing NI-DAQmx from LabVIEW.

Error loading "nilvaiu.dll" . Invalid access to memory location.

I also get an error in NI MAX when i try to load it.

There wasa problem updating the settings for this device. The operation timed out.

 

I am running:

LabVIEW 2018

NI-DAQmx 18.5.0

 

I have reinstalled all my NI products.

Thanks,

 

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How to separate a variant?

April 10, 2019, 7:02 am
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Using the DAQmx Counter - Read Pulse Duty Cycle and Frequency example, the data is stored in a variant with both duty cycle and frequency. If you want to separate the two values so they are each an independent array, how do you accomplish that? I've tried indexing the array, which only removes a single pair of values, and not one of the sets. Then, I though to use get variant attribute, but that didn't work either.

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required installers to build an Installer from a VI

April 10, 2019, 7:19 am
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Hello,

I have a problem when I try to build an Installer of my VI. LabView is requiring some installers, but I supposed they have to be in the computer after the installation of LabView. What shall I do?

 

I send you the screenshot.

 

Thanks in advance

 

 

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For loop execution timing

April 10, 2019, 7:20 am
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Hi,

 

I have a For loop for which N=30. I have a piece of code inside the for loop which takes 1 sec to execute. So total execution time is 30 sec.

I want the same program to be executed in 10 sec. How to achieve this?

 

Regards,

Sneha

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Integrating subvis together with queue operations

April 10, 2019, 7:27 am
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Hi,

I am a basic labview programmer here. I would like to ask how do I integrate queue operations together with the calling of sub-vis for a school project. I am tasked to use queue state machine (queue operations) instead for a project displaying on a LCD display. (Ie. When a feeder switch is pressed, LCD display changes from press button to dispense food >> Food dispensing) How do I approach this problem of integrating sub vis together with the queue operations? Do give me some advice... Attached here is the image of my block diagram.....

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