DAQ timing
Hello, I am getting data by DAQ Assistant in a While loop. I need the loop working just for 600ms and after that it should stop. I used two Tick Counts inside and outside of the loop (just like...
View ArticleUSB-6251 power(+5V) LED is not solid but blinking when turned on
Hi all I have been using USB-6251 for 3 years without any troubles until last week. From last Thursday, when I turn on the board, power led (which is located on top, also written as POWER(+5V) ) starts...
View Article6250 +accelerometers to TDMS files - timing calculations?
Is there a way to calculate time differences in TDMS files between a set of 5 accelerometers and when they activate? Our set up is:Meggitt accelerometers 5 pieces - 2255B modelNI PCI 6250 data...
View Articlefast AI and DO using usb-6215
Hi everyone!I'm trying to use a usb-6215 to aquire a 50 hz signal, and at a certain point on this signal trigger a digital out to kill the signal. As the accuracy is of importance where just a few...
View ArticleHow can I name all my DAQs the same so they are universal across PCs?
I have two usb daqs from NI, and they are currently labeled Daq1 and daq2, the problem is that each works only with a specific program sicne the daq assitant is only configured to one. I tried to...
View ArticlePXI 6289 Accuracy Calculations
I'm trying to calculate the absolute accuracy of a 6289 reading using the formulas in the spec. In looking at the example on page 5 of the NI 628X specification the number at the bottom that is...
View ArticleHITEC servo control with NI-USB 6351
I have a servo motor from HITEC (model HS-805BB) and the multifunction DAQ card NI-USB 6351. I would like to use the counter/timer terminals of the card in order to send a PWM signal to the servo and...
View Articleusing a cDAQ 9184 in a project
Hello: Currently I am using a cFP-2200 with multiple modules. i had to improve the performace and signal collection for a load cell, analog Input need more speed. I purchase a cDAQ 9184 with a NI 9205...
View ArticleGenerate voltage with a trigger configure
Hi, everyone I want to ask a general question about the data generation process.I used "DAQmx start digital edge" to configure the task to start generate voltage on a falling edge of a digital signal...
View ArticleEND OUTPUT CUTRE
Hello, everyone How does a " End Output Cutre.vi" work when it is right after a " DAQmx clear task.vi"? A part of block digram is shown. Thanks!
View Articleread from measurement file make slow the while loop
Hi there,I'm using Labview to control a lower limb orthosis. What I did is to record in a spreadsheet the values of the two angles in a random walk. The control model is made well because I tested it...
View Articleregarding labview application
hello to everyone. i am facing aa problem in which i have a main vi and sub vi. whenever i try to control the main vi remotly using web server in internet explorer the main vi works very...
View Articleaperiodic acquisition analog signal
dear sirs,excuse my English, it is not my native language but I cannot get help from the forum in my tongue.I have folllowed 2 LABVIEW courses but have not been taught on DAQmx acquisition. I am using...
View Articlebonjour,dans VI logger lorsque je fais un run task,j 'ai ce message qui apparait
task validation ERRORSDatabase does not ecist in the specifield path
View ArticleNI9205 used to measure voltage Kulite sensor
Hi everyone, I'm working on a project for the university. It's an axial compressor and we need to measure high frequency pressure at some places. We are using this sensor: Kulite XT-190-25A (datasheet:...
View Articlehow to output multiple scan in usb6008 with matlab
hi i need your help to use ni usb6008 to output analog signal , the analog signal is the control signal from PID controller i used this code % Initialization global Temperature global Irradiance global...
View ArticlecDAQ 9174 USB Device Not Recognised (NI 9425, NI 9476, NI 9239, NI 9263...
Hi, I have a confusing promlem and I am very close to be crazy because of that. The problem is that my cDAQ 9174 usb device is not detected by computers. (but sometimes do) 1) It had been working for...
View ArticleDebugging of VI to read from Force Sensor and RPM Sensor simultaneously
I have a VI (attached below) which reads the voltage values from an ATI Force/Torque sensor, as well as to count the frequency of an optical RPM LED signal. My objective is to synchronize the logging...
View ArticleProblems with aquiring DC Voltage with PCI6229 on a board with Intel Q87 chipset
Greetings, I have a big problem with the aquisition of a continuous measurement of a voltage using the PCI6229 on a board with an Intel q87 chipset (D3231-S11 Fujitsu Siemens). I developed a program,...
View ArticleUSB 6501 DAQmx Timing and DAQ Trigger
Hi, I am wondering if I can capture a hardware trigger using NI USB 6501. The trigger signal is perodic with following features. The duration of 0 is 200 nano second. The duration of 1 is 100 micro...
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