Hello,
I wan't to publish web application in internet .
I downloaded the project from here :
http://www.ni.com/white-paper/54116/en/
and i tried to follow the steps in the video:
https://www.youtube.com/watch?v=v81cUhdLeIc&t=6s
It works in my PC but when i try to run the web application from another pc in the same Network it Don't work .
So how to do that in my network , and from another network ? Help me please
Thank you ,
Hi guys,
I made a small program that display numerics in every case structure . I just want the program to display the numerics from the first structure if i clicked stop and they run the program again.
I appreciate all your help.
Thanks
Hello,
I am a student whose project has taken me to the beautiful land of Labview FPGA development. I am very new to this so any advice regarding my design is appreciated. Admittedly, Labview is much nicer than using Vivado, but I am having some trouble with some functions that should really be basic. I am reading two voltage inputs, comparing them, and their difference is compared to a user set value. Below is a picture from part of the front and back panels of this functionality (ignore the fact that I called my voltage readings I2 and I3):
As you can see from the front panel, the difference between the two is calculated correctly (around 1.6 in this picture). However, the LED "Diff Warning" that SHOULD turn on as soon as this difference is above "Differential Setting" is still turned off. As a consequence, "Fault Location" stays at 0 and is never set to 1. I've bashed my head at this for a while and honestly every compilation takes 10 minutes and I can't take it anymore.
Any idea why this might be? I will leave the code file attached as well if anyone is interested.
Thank you for your help everyone!
PS: Here is my system info
-NI cRIO 9024
-FPGA cRIO 9114
-Input module is NI 9223 (seems to work fine)
-Output module is NI 9401 (not as issue at this time)
Hi,
I am trying to automated a Wi-Fi board. Some of its inputs (pull down selections, e.g Params Value) are dependent to other inputs ( Combo iw, e.g iwlist/iwconfig). How to have some inputs values depend on the others before executing the vi interactively. In another words, each iwlist or iwconfig is going to have different pull down menu (case).
Thanks,
Rostam
First, no signal processing toolbox!!
I have an IIR filter to implement in a vi. My only trouble is that the filter has stored data states that must be maintained between calls. This vi will only handle one signal source so it can store the filter state in the vi. It should have one input and one output. So for the data kept between calls to this vi should I use global variable or ?????
Hi all,
I can't seem to find the Application Directory VI in LabVIEW 2017. It's not there under the "File constants" directory. All the other vi's/functions are there. Any explanation or help is greatly appreciated.
Hi!
So, for the first time, i have to work with the ethernet/ip protocol.
I would like to know if there is any examples or tutorials about the protocol and how to program the communication read/write.
I've check on the internet and read the documentation and i know a bit how to do it with the address and everything but nothing more.
One thing i don't know what it is, is the "number of elements" input. Is it only the number of element in my array for example? So, if my array contain 4 values and i put 3 elements in the inputs of the "Tag Read", i will only read the first 3 values?
Another thing is that i dont have access to a PLC for now. Is there a way to simulate one? So i can know my path is good, know if i send/receive the data i want and test more things before having the PLC with me?
Thank you!
- Dave
As the subject says, I am having difficulty with the keyboard shortcuts for LabVIEW 2018 on Win10.
Ctrl-anything is problematic. I have to leave the keyboard untouched for ~1sec. then very deliberately press Ctrl and then e to switch to the block diagram.
This is across several machines, and I have never experienced it before in >15yrs of LV development.
Any idea what could be causing the issue?
Keyboard incl. shortcuts are working fine in all other Windows apps. Drop-down menus are normally responsive. Typing in LabVIEW shows normally responsive keyboard. Only keyboard shortcuts are having the issue.
Hi Guys,
I am working on a labview code to read data from atmega 32 microcontroller through USB. But I am facing a problem. whenever the data crosses form +ve voltage to -ve or vise versa, the data point is lost and instead a positvie or negative spike occurs. I have tested my circuit on the CRO and no such peak exists. Thus I think the problem lies with the way I am reading the data. The (digital) hex data read, is converted to analog as per the "result representation" of atmega manual. Please find my VI, read waveform and the result representation attached. Please let me know if anyone finds my mistake
Thanks a lot!!
Have a great weekend!
I've built a tester for automotive solenoids that used NI DAQs and a computer. We simulate the powertrain signal, apply it to the solenoid, measure the pressure response, then save and analyze the data.
Today, I happened across a few NI articles on Hardware-in-the-Loop system. As I'm trying to understand the HIL concept, I was wondering if our test system qualify as a HIL?
Thank you for your help,
Ron
Hello all,
I'm currently working on a Lab view interface for a Rocket thrust measurement Test stand. We're using an arduino and XBee connection, although for our current tests we've been using a hardwired connection. The problem is, the serial data input from our test weights is currently being written to graphs at an incredibly delayed rate. As in, I'll take the weight off the sensor and the graph/response will show that fact dozens of seconds later.
We're using VISA in this to receive serial data (the arduino is coded and calibrated to give accurate weight) in the form of pounds vs seconds
How should I counter this? I tried increasing my loop delay, but that didn't seem to be having an effect. Ideally, we want the graph updated in real time.
I attached the file, although it's currently unfinished (formatting in particular, and it also has three version of the graph I'm using). I don't (currently) need help with anything but the graph-writing delay however.
Thank you for your help.
hello friends... I have a binary file with a .MAX extension, created by ECG machine. I can't open in normal mode. I tried with LabView to read that file. results obtained are not satisfactory. it is attached here. please, someone, help me to read that file and extract data from that file.
thank you
Hello.
I'm developing complex program, which works with IQ-data.
I'm really new in demodulation.
So, the app reads iq-file, draws waterfall and next step, a user selects fragment on waterfall an dthe app wust play this signal.
Here the WF. You can see 2 gignals. I need to play the right one (USB)
In my company we have od version of demodulation, and it almost works, but I hear second signal (like peep).
Now I hry use modulation toolkit. And AM-demodulation VI has single-side mode, but I can't tune it correctly.
Here my test vi.
I've also attached LV-15 archive with all subVIs.
Can anybody help my with USB-demodulation?
Central F in file = 10.052400MHz
Hi everyone,
I'm having some troubles to get my PIC (18F248) to communicate with my MyRio 1900 Board through i2c.
In my case, the PIC must be the master and the MyRio the slave.
Does anyone know how to make the MyRio act as a slave on i2c bus ? (with FPGA for example)
Thank you !
Hello,
I am trying to create a DLL library inside the system32 folder from a series of .vi files. The build fails, yielding an Error 8 message. However, it succeeds if I select a different destination folder (e.g. C:\).
Please note that this used to work in Windows XP and Windows 7 but it fails on Windows 8, 8.1, and 10.
I would appreciate any help.
I am quite sure that the administrative privileges are sorted, and I also tried the suggestions on the NI website to no effect.
Hi,
I'm a french electronic teacher and I use Labview and MyDAQ board with my students.
So this is my question :
I know that MyDAQ does not support the Hardware-Timed Single Point Sampling Mode (HWTSP). So, if I have well understood, if I make an acquisition with continious samples, this samples are automatically stored in the buffer before they go to the vi treatment ? And the same for the Write function ?
The treatment sequency should be this one :
1 : reading sample
2 : storing in the reading buffer
3 : vi traitment
4 : storing in the writing buffer
5 : writing sample
If the sample frequency is set to 1kHz (see attached VI) : at t=0ms, the board reads only 1 sample, puts it in the reading buffer, then treats the data (this duration is approximativly few microseconds), then the sample goes to the writing buffer, and after it is written to the board analog output.
At t=1ms, we do the same, etc each ms ...
Conclusion : are we making single point treatment (N=1 in the For Loop) ??? The difference with the HWTSP is that we must pass through the buffer ... ?
Thanks for your help !
Regards,
David
Hi Everyone.
I want to write serial data to "2 Channel PWM Pulse FrequencyWave Signal Generator Module" which has the serial port. I have connected to Arduino Mega2560. I have used Linx but not writing the value attached VI Code not sure what is cause. or am i using the right method. My question is can i write labview program to send data to third party device with serial channels available on mega2560 ? If yes i am using linx will that work.
Please someone suggest me..
Hello RavensFan. I was trying to get a new question started in the forum but I could not figure out how. I decided to reply to our last conversation. You have been so helpful, that i thought to pick your brain on a Linx/Arduino topic.
I had an LIFA code working, but all the sudden labview does not communicate with the Arduino MEGA board (tried different boards...if flashes from arduino fine, but no communication in labview). Following recommendations from the community, i have switched to LINX. I have the program communicating and running, and all my digital pin writing functions work as expected. The issue comes on my digital reading. I used to set digital reading pins to a HIGH state by turning on the pull-up resistor on the board (arduino has a function). To do so in labview, I simply set the a pin to "read mode" and then wrote to the digital pin with "1" (effectively turning on the pull up resistor, see bottom of image attached). Then, i read the digital pin again, and when "0" (ground) would be sent, I could reliably detect the change in state of the pin (as it would come from high).
In LINX, you do not need to set the pin function (read/write) a priory. Simply pick the function and select what channels to read/write. I attempted to set the pins to high as i used to do with LIFA to turn on the pull-up resistor, but no luck.
Do you know how to turn on the pull up resistor in LINX?
I have attached some images... i could put some sample codes if you would like me to. Thank you very much for your time and help.
Hi. I cant open tdms files with excel 365 (2019). I'm using Labview 2018 32 bit with Windows 7 64 bit and converter tdms to excel ver 2018.
The same files can be open on another pc, so they are uncorrupted.
Here the error message I receive from excel:
Any suggestion?
Thank you.
Antonio
