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Reverse engineering a VI

Hello,    Please check out the attached VI. I've inherited code from a previous engineer and I'm trying to wrap my head around how this particular VI works. I appreciate it!  Jay  

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send signal to Relay

Hello Everyone,  I have been working on a labview program that will essentially control a set of motor in a machine. I currently have a simulation of what the final product will look like(attatched...

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Labview Community Edition Download error

When attempting to download the community edition of Labview I repeatedly get the message the download was not successful I have tried over several days using different ISP's and different computers....

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Open channel voltage jumps from + to - 10 Volts

Setup:cDAQ NI-9189NI AO 9264NI AI 9209NI DI/DO 9375 Project:Design a VI for a Dynomometer that shows raw voltage and calibrated values live for RPM, Torque, Thrust, Cylinder Head Temps, and Fuel...

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Sending commands to RSPD 3303X-E power supply

Hi All,  I have a RSPD 3303X-E power supply that I would like to control through labview. I keep getting an error message as follows: Error-1073807343 occured at VISA Open in file-name.vi Possible...

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What causes this error "The requested action is invalid while onboard memory...

I am in the process of enabling continuous peer-to-peer streaming between the PXIe-5122 Oscilloscope and the PXIe-7846R FPGA module. However, I am receiving an error stating "The requested action is...

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how to make dll

hi all. in my attachment has 2 vis. both 2 i've made dll. why only the numerical vi can be called and succeed.the vi has array can not be called succeed.  Any help would be appreciated. 

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VISA Code to read conductivity with an eDAQ EPU357 Isopod - error -1073807194

I'm trying to develop some Labview 2019 code to read and log conductivity with an eDAQ EPU357 probe and one of their Isopods, which connects to the PC with a USB port.  The code sends a text string as...

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Simple C code scripting environment in LabVIEW

Hello,  I'd like to create a simple C code scripting control in GUI and convert those text to LabVIEW code.I have been thinking how to make a most effective structure for that but is not easy to...

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Loop 2 is not responding using the Events also the Loop 1

I am working on a project to log data on 100 KS speed. I have made here demo code. when I am using the events in Loop 2 this is not executing also stream of Loop 1 not executing which is controlled by...

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ODBC database renewed, Labview doesn't recognize it

Hi. For a long time ODBC access to a MySQL database worked fine with my LabView-VI. Recently I changed the database/catalog. (Not the ODBC-connection name.) The old one named 'mand15', the new one is...

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How to Read Fuel Dispenser data in LabVIEW

Hello to every one..i want to make fuel management system for vehicle. i want to read fuel dispenser data ( amount of fuel filled any vehicle) in LabVIEW.is it possible to connect fuel dispenser with...

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为什么找不到VISA设备?

Moved to Chinese board

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Output chopped signal from thermopile sensor and chopper squarewave.

Hello everone, I am using NI uSB-9162 for data acquistion from my thermopile sensor which is placed next to a optical chopper. I am using two channels in the NI-USB, one is the acquistion of data from...

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Unable to open LabVIEW 7.1 application (.exe) file in LV 2018

Hi,I am given a very old LV application file and am trying to open it in my LV 2018. When I try to open this file, I get an error message saying that I will need a LV run-time 7.1 installed to open...

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Access Scope of Library

Is there a reason why I can't define the access scope of a library until a place it within a virtual folder? All I want to do is make all these libraries private just as they are now, but instead I...

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Strange behavior of Multi column List box Background Color based on User...

I've come across a strange issue which I'm wondering if anyone else has seen before.  I have a built application which reads data from a database, and displays a list of jobs to the shop floor.  The...

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Secondary Project Provider for lvclass to make custom menus

I am trying to make a custom menu item when a user right-clicks on a lvclass in the labview project.  The goal is to make it so that a developer could select a custom member template.  I'm pretty sure...

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TDMS File Error

Hey Guys, I just started with LabVIEW. I need to acquire data from different temp. sensors and write them into a tdms file. I already read that i should not use express VI's to get a better...

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Standard Service Program for CompactDAQ Systems

Hello , I have an end user ask for pricing for Standard Service Program for CompactDAQ Systems--Two additional years of extended warrantySRV-CD5963197

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