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I am trying to find an average for 18 channels starting from channel 9 up to and including channel 26. I have made the array but it is not working. please see the file attached.
Hi,
I have created a fully functioning V.I and I have used it as a server V.I in a new project.
To create my shared variables I am selecting and adding each of them to the added variable list. I have 21 items in total (they are Boolean and DBL), 19 of the 21 are adding no problem but when I select any of the other 3 the "add" button greys out (see pic) and I cant add them to the list. 2 of the items are Boolean indicators and the other is a numeric indicator.
These items are important to my project, whats causing this problem?.
Thanks.
Hello,
This is probably a silly question. But in the back of my mind, I had always assumed this, but I would like confirmation:
A subVI will always retain output/indicator values in memory after each call, until LabVIEW is closed.
Is this correct?
So if I had called the subVI once inside VI #1, and then I called it again inside VI #2, the output/indicator values from the VI #1 call are still available to be used when called inside VI #2.
There doesn't seem to be any documentation about this, unless it's deeply embedded somewhere and I haven't found it.
Thanks!
One of my two computers have installed so many large NI softwares and ultilities. Now the same files are expected to be installed in the other computer but the speed will be slow if download from Internet. Can I just copy the files downloaded through NI package manager to achieve the installation? If I can, what folders and files should I copy? where are they?
Thanks!
I'm performing the exercises for the LABVIEW CORE 3 chapter 4. It's pretty straight forward, but I started having problems and I can't explain why this is an issue.
Probes show that the queue refnum is valid before the wire enters the event structure, but becomes invalid when it enters the structure. I even made an event case that doesn't do anything other than pass the wires through it unaltered. Any ideas?
Hello guys.
I’m new to Labview.
I've been involved in a project for cavitation in valves. I will use a lot of sensors for cavitation detection. 6 pressure sensor (omega PXM409 Series), 1 dynamic pressure transducer (Kulite-HKS-LP-375), 1 thermocouple (elimko pt100 rt02 1p06), 2 accelerometer (ENDEVCO Model 7250A), 1 flowmeter ( KHRONE OPTIFLUX 2000), 1 hydrophone (RESON Hydrophone TC4034 and Reson EC6081 Voltage Preamplifier + filter (2.4 Vrms)), 1 oxygen (Honeywell DL 5000) sensor. I have PXI-E cards and chassis; pxi-e 8301 , pxi-e 4480/4481, pxi-e 6341 and chassis pxi-e 1071.
My problem is that I would like to run these sensors simultaneously with daqmx at labview. Is that possible ? How will can I design it ?
Thank you for yours help.
Hello,
I would develop a VI for 2D scanning with two axes motor controllers (Thorlabs), in order to realize a numerical matrix. The scanning code is included in an event structure and it is selected by the choice of a string condition (case structure). Two bottons handle the start and stop of the scanning.
Actually, the start and scanning code work correctly, but the stop botton doesn't work: pushing the stop botton the scanning code doesn't stop, but i must wait until completed scanning running.
I'm a basic user of LabVIEW, and I'm sure that I didn't initialize correctly the conditions for the 'stopping'.
Could you help me?
How I can solve this problem?
Thank you
p.s. in attachment the VI.
Hi guys, I'm using LabVIEW 2017 and NI myRIO for my application. while trying to run my program, I got this error. I have read several forum related these error, and I have
1. Disable my firewall
2. Uninstall antivirus, since I don't know how to disable it
3. restart the NI Variable engine
4. Undeploy and deploy again
after doing all these steps, I found that my SVE did not appear at NI distributed system manager even after I deploy the SVE again.
Now, I'm not sure how to fix this
Hi, I wanted to log data more than than1048576 rows(max.numb of rows in excel), how can I do it?
I am using the write to spreadsheet
I tried adding sheet but it did not work out (using report generation toolkit)as it affects my other structures
so I was thinking to add a new log path after the first sheet of excel is full 1048576
Hi,
I am trying to perform simple serial communication between Labview and the spark concepts xpro v4 cnc controller (atMega328p). I have no problems using a standard serial communication terminal in TeraTerm to read and write to the device. However, when I try using the Simple Serial.VI example in LabView I get the following I/O error on the Visa Read function.
Error -1073807298 (Hex 0xBFFF003E) occurred at an unidentified location
Could not perform operation because of I/O error
I have tried the solutions offered online such as updating Visa drivers, changing the Visa buffer, and ensuring that no other processes are interfering with the I/O ports. The device appears on NI Max and I am positive the serial settings are correct. Labview successfully writes to the device but throws an error on Visa read. Strangely enough it will successfully read sometimes if the Visa read is put in a While loop and the input and output values are tunneled through but still has the error and this is not the implementation of the code I want to write. Any help would be greatly appreciated.
My script should control if the wire is connected to particular function. The script works easy but... crazy.
When types of Owners (nodes connected to the wire) are controlled, the most specific obtainable type is "Function". But which Function is it? (I need Close Reference but the same can be questioned about any other function). The only way I found is comparing icons as shown in the snippet. Isn't it little crazy?
There should be a better way but which?
What am I doing differently between these two files? I want to plot two curves on the same plot in the file DecayingGaussian.vi, but when doing the same thing as in 2 curves in single plot-1.vi, I get an error. I'm at a loss.
Hello, I have Vivado 2018 software installed in my computer. Can we do LabVIEW FGPA Programming and compilation with out installing Xilinx FPGA compilation toolkit?
if yes please provide sufficient information regarding this like how to interface Vivado 2018 with LabVIEW for FPGA programming and compilation.
Hi,
I have LV 2018 installed on a Dell 7040 on Win 10. For some unknown reason MAX keeps crashing every 3 - 4 weeks. Message is either a PXI plugin or unable to connect to the database. I followed the solutions found on the forums but always ended up in reinstalling LV2018 completely. Software the was suppose to be in the MAX/Shared locations was not even there. Yesterday one of the solutions was to do an uninstall via the control panel. Well to my surprise NI software did not show up in there. I ended up doing an manual removal but 1 file I can not remove. I changed the ownership from Trusted Installer to my account name, I didn't help. I was able to rename the National instrument folder in the program files so hopefully it will not interfere with the new install. Are there any known problems with MAX on the win 10 platform?
I am now considering going back to XP and 2012.
Any thoughts are appreciated.
P.v.W.
ps , tried to install the LV 2018 from stick just now. It doesn't install.....
used ccleaner to clear registry.
Hello everyone,
i'm relatively new with labview FPGA,i am useing USB 7855r and SCB-68 and im testing some Sensors, i wanted to give some range voltage and with steps and repeating , i mean i want voltage from 0 to 5 with certain steps(like 0,5) - so (0v, 0,5v, 1v, 1,5v ,2v ,2,5v , ...) and i want to repeat every voltage like 5 times or something. i wrote this program but it seems there is problem, can anyone help??
I also wanted to save Datas so i made FIFO but some how i dont get and data in my host VI ?
Thanks
On the one hand, I have built two projects that are almost the same but one is written in Labview 2018 and the other is written in NXG 3.0.2. The performance of program in LV2018 is obviously better than that in NXG 3.0 and in LV2018 I can achieve a higher IQ rate without buffer error.
On the other hand, I used the example project "FM demodulation" which is shipped with Both LV2018 and NXG. With the same parameters and configuration of USRP, the performance of program in LV2018 is still better than the other and it seemed that the same code written in NXG costs more time generally.
I sincerely hope that the performance in NXG will be improved in the near future because I prefer to establish my project with NXG in class. Thanks a lot for all engineers working for NXG here!!
Hi,
I have installed Labview communication Design Suite compatible - LTE Framework on my system.
In it the framework is basically appears to be design for one UE and one ENodeB communication. As per the manual of the LTE framework, the code is configured on the LAbview and then implemneted on the FPGA. The main problem,I am facing is, how to identify and configure the existing LTE framework code for 2 Recievers.
Hi,
On the NI website it says "The data you wire to the terminals of each shift register must be the same type", yet when I wired a DBL control to one of the terminals & an I32 control to the other, no errors or broken wires appeared, so I'm quite confused as to why the NI website said otherwise (please view image attached).
Thank you
