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is there a way to verify a database write?
I am writing to a access database but get inconsitent writes. Sometimes it is written, sometime not without any way of me knowing when this will happen. I am able to double check the write afterwards...
View ArticleTimed Servo Movement
Hello, I've been trying to get a single servo to move between four different angles, staying at each angle for a given amount of time. I've had some luck using timed sequences but my servo is acting...
View Articleselection between multi screen
hi dear friendi want creat multi screen and selection(jump) between this screen. what i must to do ?
View Articlehow to use user event with event loop
Hi,I want to communicate between 2 VI, so I have a global variable (boolean) that gives the order to an event tool to run. The problem is the fact that event loop does not accept global variable, I...
View ArticleCan you trigger data acquisition through Modbus TCP/IP PLC communication...
Hello, I am trying to communicate with a facility plc through Modbus TCP/IP communication. I am new to this method but the idea is that the facility will send logical (boolean) 1 bit values over...
View ArticleBest way to record 50 kS/s data to file
I am trying to read data from a DAQ at a sampling rate of 50 kS/s and record it to a file. My application needs to run for at least a few hours. Initially, I tried a producer-consumer loop pattern with...
View Articleanalog period measurement
I'm sort of confused as to how the Analog Period Measurement VI works. I have an input signal controlled by a potentiometer which goes into the analog period measurement. I want to be able to find the...
View ArticleDereferencing a pointer to a pointer
Hey all, While I am finally getting the hang of LabVIEW, I only really know the basics of C, especially when it comes to pointers/dereferencers, and interfacing those things with labview. I have a DLL...
View ArticleQuick Drop Question
I've been using quick drop quite a bit lately. I use the CTRL+space, CTRL+I to insert VIs into existing wires, but there are times were it's faster for me to drag VIs from the palette onto the block...
View ArticleFind the corresponding element in 2D Table
Hello everybody,I have probleme that I can't fix,In my VI I have a table of two column of 5000 element in each column.In the column A, I manage to find the min and the max, What I want to do it to find...
View ArticleDeveloping HALs
In an effort to bring even more flexibility to my code I've started to create HALs (Hardware Abstraction Layers) using NI Shared Network Variables. This has helped me a lot because it enables me to...
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'read from text file' erases the file
I am trying to read text in from a text file. This is the exact code I am using. For some reason the output from 'read from text file' contains all the text that was originally in the file, but after...
View ArticleCan I use shared libraries such as lvanlys.dll for matrix inversion on a...
I tried FTP transfer the dll file to the RIO device. the RT MPU.vi can run without error. But the library does not appear to be called.
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Appended text file in loop adds unwanted delimiter value at end of each...
I am using 'Export To Spreadsheet.vi' in a loop which saves a text file and appends data from a 1D array waveform for each iteration. My problem is that at the end of every iteration an extra delimiter...
View ArticleUnicode display in frnt panel controls
We have a control holding all the language translations of front panel control captions. The vi will deide which language to load based on user prefernence. However when the vi try to assign the...
View ArticleHorizontal scrollbar of waveform chart in tab page resets to end when tab...
I've got a VI in LV 2012 with a chart in one of two pages of a tab control. Whether compiled to an executable or not, when the waveform chart contains data that is no longer being updated and the...
View ArticleWhat is the proper way to run a DMM and Scope back and forth continuously?
I am running a list of tests from an Excel file that could be a DMM or Scope test or neither. I am creating a session of each at the beginning, setting up the device before measurement and disabling...
View Articleincluding openG VIs in project file
Is there a way to place OpenG library VIs in my own file hierarchy so that they can be more-easily distributed in my lab without having to install the OpenG libray on every machine? I'm finding that no...
View Articleproblem in separating data and instrument name in a string
i am working on instrument automation project in which i am passing an array of some instrument list, which contains instrument name and the data to program the instrument, with the help of the match...
View ArticleAccessing FPGA conditional disable symbols from the host machine
Hi, Is there a way to programmatically access FPGA conditional disable symbols from the host machine? I would like to have a host VI that could know whether e.g. the FPGA bitfile was compiled with...
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