how to open matlab command window
I have a vi with some matlab script. When I open the vi, a corresponding matlab command window will automaticly open. It has worked well for a long time. Recently, a problem always accours that the...
View ArticleWhile loop doesn't stop when two values are equal using equal-to comparitor
Hi everyone, I have a really, really odd bug. I have a LabVIEW VI which changes the voltage of a channel on a power supply unit. I have a start voltage and a stop voltage and use a while loop to...
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Host to FPGA DMA fifo timing error
Hello I am new to labview .... and wanted your help on an issue I want to tranfer data frm the host to the fpga and then to the Analog output module...I have attached my VI. there has been a timing...
View ArticleSound output on the DAQ
Hi! So I am using the myDAQ and I have an electret mic hooked up to ai0, and a thin speaker with circuitry on the ao0. I want to get a signal in from the mic, then send it out to the speaker, and I am...
View Articlewhat do I've to change if I want to use my .vi with another DAQ?
I've done a labview project (.vi) adquiring data with an internal DAQ but now I need to work in another PC and I´m going to use a DAQ-pendrive. What do I have to modify in my project? Thanks for your...
View ArticleVi file size suddenly increased
I have had a main vi file size of about 160 KB for several days now. All of a sudden today after ( maybe after making very slight changes to my SubVi -not sure about this) , the main vi file size...
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Need access to registers 0x0000 – 0x0FFF of ethercat device.
I'm trying to read a register range from an ethercat device that is not visible to me via the NI tools.See image: =================================== As you can see from the NI Online Slave Device...
View ArticleFFT block inside a nested loop
Hi all, I am using a Desktop Execution Node (DEN) to simulate my FPGA design. What I am trying to do on the FPGA is to read a signal spectrum that is 500 points in size and find its FFT. However, to do...
View Articlecreating commutation signals BEMF
I have a BLDC motor setup where I control the inverter using hall-effect sensors. I now want to control the inverter using BEMF -signals. I can do the zero-crossing detection. In BLDC control the...
View ArticleSquare-wave-signal
Hello,I want to generate a square-wave-signal, which should run between two limits. The upper limit is ok. But the lower limit doesn't work.E.g. the upper limit is 30, the lower 5 and the level "Pegel"...
View ArticleHow to do the derivative of a numeric signal obtained from serial comunication
Hello guys. I'm really new at this and i have problems with data type. So I'm reading a sensor with an arduino and getting the data to labview and i wanna plot the derivative and I have the function...
View ArticleProblem with device
Hi everyone. I m new in Labview.I want to connect my pyrometer to PC.I made COM-USB connector. Made small programm in Labview. Check attachment.First time I had no problem. Then, appeared such...
View Articlelabview and PLC
你好：1.请问labview 通过NI OPC server 2013 连接三菱 QJE71-100（以太网模块）时，opc创建500个标签，那么labview一次性读取PLC 500个地址（D存储区）速度可以达到多少ms？2.labview与plc 通信速度最快采用什么方式？3.目前最新ni opc server是2013版吗？以上目的是想获得最佳通信响应速度，请指点并回复，谢谢。
View Articlewhat does "current setpoint " stands for in PI Flux torque loop inside NI...
I have attached the required palette here in attachment.I need this for achieving torque control of 3 Phase Induction Motor.But looking at palette it is not clear to me that how can i give reference...
View ArticleDoes NI still produce Windows-based cRIOs?
Hello, I have a customer who wants a small embedded PC that does the following: Acquire data through a 3rd-party device over TCP and store on diskShow a live video feed (and capture photos) from a GigE...
View Articlestring on USB port
Hello everyone, I want to send a string data to Raspberry Pi via USB port such as name, time, date of birth, etc. This will be send only when the user updates it in Labview program. Is sending direct...
View ArticleCAN over EtherCAT and NI CRIO
Hi everyone, I am having 2 Panasonic EtherCAT servo drives. Wanted to control them using CAN over ethercat communication protocol. What are the possible NI modules supports my hardware and protocol. I...
View Articlehow to fuzzy logic vi in starter kit 2.0(sbRIO )
when we are working on Fuzzy logic project we have faced a problem,our problem we have writtern the fuzzy logic with help of fuzzy designer toolkit and we have fixed to the starter kit 2.0 using case...
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All functions in DLL gets called
I have written a simple dll with 4 functions: GT_LABVIEW_API void set_reg_event(LVUserEventRef *event_ref);GT_LABVIEW_API void set_integration_time(int32_t *time_in_ms);GT_LABVIEW_API void...
View Article.wav file
i an taking angle value from a sensor and displaying it in a graph on labview. I want to play the sound that would tell me the angle whenever it is changed using .wav file. how to do this??
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