Allow "Unflatten from XML" to work without internet access?
Edit: This message was supposed to be posted in the LabVIEW Software board... Sorry about that. Hi all, In my program i'm using the Unflatten from XML and the Flatten to XML vis. On my development...
View ArticleHelp with photon counting vi using LabView 2014 by USB 6251
Hi, I am a chemistry graduate student who is brand new to LabView. I am looking for some help with using the APD photodiode to count the number of photon. I want to gate the APD by applying on the APD...
View ArticlecDAQ 9178 & NI 9401 - ASM Incremental Rotary Encoder not working beyond a...
I am using a cDAQ 9178 chassis with an NI 9401 DIO module. I am trying to convert the output from an ASM incremental rotary encoder (in radians) to rpm. Sensor head...
View ArticleSynchronizing encoder data with voltage readings
I'm trying to measure a voltage signal and in some way synchronize those readings with angular position from a stepper motor. I'm controlling the stepper motors with a PCI-7354 and collecting voltage...
View ArticlePCI 6601 counter - resource reserved while debugging in Visual Studio
Hi, I'm trying to debug an application which uses counter1 on the PCI 6601 bord to create a continous pulse train. The application is in VB and with Visual Studio 2012 I always get the Error: -50103...
View ArticleSquare wave generation phase offset problems using PXI6602
Hi, I am generating 2 signals to use for simunlating an Incremental AB encoder using a PXI6602.The signals need to be square wave, 34.133Khz, offset by 90degrees which I am setting by dividing...
View Articlethread
Hi All, I would like to know how will i be able to tackle a seemingly simple issue.I would want a timer to start immediately, when i type something from my keyboard(or a scanner). All the characters...
View ArticleCounting the number of samples when all counters are being used
Hi All, I'm using PXI-6284 which has 2 counters on it, and I'm outputting 2 pulse trains using these 2 counters. Using an "elapsed time" function to control the number of pulses is not very accurate...
View ArticleDAQmx Quadrature Encoder Initial Position
Hello, I am building an application that requires trackig the raw counts from a quadrature encoder connected to a NI USB-6212. In order to count each rising and falling edge of both channel A and...
View ArticleCount number of triggers from paused counter source
I have a very large, very complicated VI that I am using to control an experiment. This experiment requires certain environmental conditions to be true in order to acquire data. Once these conditions...
View Articlehow to stop a period counter in a while loop without using abort execution?
I am using a NI x series 6343 andcounting pulses, but when i try to stop the counter with a boolean operator nothing happens, ihave to go and use abort execution, Help
View ArticleDigital counter speeds
Hi everyone, I am currently using a NI 9401 with a NI cDAQ 9172. I am using the onboard counter to do the following (pseudo-code): - on every digital edge on counter-input pin 1 : p=p+1- if (p = 100) {...
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Counter Output Pause Trigger
Hi! I am having difficulty at pausing an acquisition signal.Attached are the vi I use: the "INIT_SCAN" is the first one, then come "GET_SCAN" and "CLOSE_SCAN". I believe the modifications I need to do...
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Using one counter (Dev1/ctr0), how to prevent activation (High state output...
Hi, i'm using the PCI-6255 and PCI-6251, both have 2 counters. I have the problem that when i use just one counter, the other generate a high output in the PFI line during the time when the first...
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555 Timer
HelloIve some problems with the 555 Timer. I'm trying to get an defined pulswidth signal out of a current signal.My problem is the circuit should work with 0.25 to 1 Hz on the current signal. I've got...
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PWM measurement pattern for continuous samples over higher frequencies...
Hi Folks, I have a challenge which I like to discuss with you and hope to get some ideas and maybe a solution. I have a National Instruments multifunction data acquisition (DAQ) devices NI-PCIe-6353...
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help to check my project convert digital signal (count edge ) to RPM
I want to get RPM from Motor use rotary encoderand insert to colom N on table measurment..but i doubt , my project is true or wrong..to convert digital signal ( pulse ) to RPMi used count edge on USB...
View ArticleModule and wiring for frequency measurement with Yokogawa flowmeters and a...
I need to measure the frequency output of three Yokogawa AXFA14G flowmeter and a speed pickup using a cDAQ module and 9188 chassis. I am unsure of the best module and the correct wiring. The Yokogawa...
View Articlecount revolution per minute with NI 9237 and strain gauges
Hello community, i am a labview beginner and i need some help. I work on a alternating bending machine which is bending a specimen. An AC motor produces the alternating bending. The AC motor in...
View Articlemeasure analog signals and frequency simultaneously
Hi, I have a question. I bought a NI cDAQ-9188 chassis and seven modules. Six of them are for measurements for example the temperature, voltage... and one is a counter (NI 9401) for the frequency. With...
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