The time between VISA W/R

Similar Questions

• Measure the time between the ridges of the periodic input signal

  We have built a circuit which is supposed to mimic an Exercycle.  We have an IR switch and a spinning wheel, the rccb meets a comparator circuit and the output of the element of comparison, we have running in LabView.  We successfully were able to measure the number of rotations of the wheel and the total distance travelled by the wheel, but are struggling to measure speed.  We cannot find a way to measure the time between picks in real time, which we could then divide the wheel circumference and calculate the speed in real time.  The VI I posted has a square wave simulated rather than the signal we receive on our circuit.  Thanks in advance for the help.

  Jon and David

  I think you're overloading the things trying to get the time between two pulses.  Instead, you can use the VI Express your measures and select frequency for her custom. Then, you can multiply the circumference of the wheel of the frequency to get the speed.

  I hope this helps.

  -Christina

• How to find the time between two channels of entry in the data acquisition card or pci 6036

  Hello

  I read a lot-related posts on the simultaneous measurement of two input voltage of similar channels in map data acquisition. I know that the best material is "simultaneous measurments of the Series DAQ cards" but I only pci data acquisition card 6036 and I try to understand what is the time between the reading of the two channels . This period is always constant? (must it rely on a voltage (amplitude, frequency, waveform..). I send the sine wave (s) to the two channels and read the values of V, if they read the same value, the difference should always be zero but I get-0,002 to 0.002 Volt difference (I must find a way to convert it in time). A screenshot of my VI is attached. I wonder how I can accurately measure the time delay between the channel.

  I am open to any suggestion, my final goal to read exactly two channels at the same time ((ou connaître le délai exact donc je peux correspondre les données correspondantes étant donné le temps de retard))

  Hi spinup,

  better you should post your question in the forum of LabVIEW, LabWindows/CVI is used

  Good luck.

• Take the time between two values

  Hi people,

  I have a problem and I know idea how to solve... I need help.

  The problem is I want to take the time between two values max as you can see in the chart.

  For example, in the image that I have add

  4.5 - 1 840 = 2.66

  And enter this value in the 'time between mostra '.

  It's that I want...

  But what I think is very complicated, because I don't know how to take the time correctly and does remove...

  Thank you very much

  Any solution?

  Hi jocuma,

  I tried something and hope that helps u.

  Just create two arrays of temperature and voltage. First of all, I'll get the value of the voltage when it is more of a certain value and that same index to get the value of time and store in the shift register.

  When I get the second higher than the limit value, I'll get time and subtract the previous value.

• How can I measure the time between each two successive increase edges, using digital input?

  Hello

  I have tried two measure the time in seconds between each two successive rising edges on a digital input.

  So far I managed to detect the rising edge, increment a counter at each rising edge and take the time during which the increase is edge

  all I need now is subtract edge currently rising from the previous era of edge rising to calculate (T), which can be 1/frequency and display in real time for the user.

  but I do not know how to do this

  Can someone help me please!

  Woah!

  Sorry Apok, but your code becomes much too complicated and salty. I don't think that all records to offset or Boolean conversion/operators are necessary at all.

  If you want to measure the time between two keys so it's another (much less complicated) way. It simply records the time when press button in a registry change, then compares the two.

• Measure the time between two digital pulse

  Hello

  For a non-critical calendar application, I need to measure the time interval between consecutive TTL pulses, ranging from the order of 0.5 s for a few seconds, with a low accuracy of +/-10-50ms. The interval being measured varies between the rising edge of the first pulse and the front of the next and so on.

  I have several input lines I need to deal with. Because it's a critical machination low cost, I don't want to use digital counters for each line, so I work with an acquisition of data USB6008 and have connected the input rows TTL on the digital inputs of the device. Avoiding will be sufficient.

  I found a good example of VI on discussion forums that does almost the same thing, only it uses instead of the DAQ Assistant user input. The VI works including the time the program going on in a while loop. I replaced with the DAQ Assistant output (a channel) user input in the hope that it is still work.

  

  When I run the program in "run once" mode, it seems to work perfectly. However, in "continuous run" it measures only a very small interval, probably just the time between two samples.  I think it has something to do with the help of a while loop in combination with the DAQ Assistant. Anyone who has any suggestions how to solve this problem?

  Thank you!

  OK... first of all, you should never use the button "run continuously.  I wish that NEITHER would be to eliminate it, but told me that it is sometimes useful for debugging.  If you want your program to run over and over again, use a while loop with a stop"" button.

  If I'm reading your code correctly, you make your initial moment, and then collect data from data acquisition.  When one of the channels is "T", you stop your loop and the end time of capture.  (By the way, why you convert your table to a cluster?  Why not just index the appropriate channel in the table directly?)

  Since you want to capture the time between two consecutive pulses, you need to know when a transition has occurred... i. e when your digital line went from F (no pulse) to T (pulse start).  This will give you your forehead.  Right now, all you're doing is looking for a value T - so you have no way of knowing if you are looking for to the previous impulse again, or a new impetus.  You also burn 100% of your processor with the way you have your programme in place.

  You need a small loop delay so that your VI is not 100% of your hogs CPU time.  Given that you can live with an accuracy of 50msec, what I suggest that you use.

  See attached picture for you give an idea of how to implement.  He will probably need some refining operations, but it should point you in the right direction.

  

  I hope this helps.

• How to set the time between workstations and Server 2008 R2

  Hello world

  I have problem with my Server 2008 R2

  all the workstations on my company doesn't synchronize the time on the domain controller

  I tried many ways to set up automatic synchronization via command prompt (Net time) and its does not work

  Please help me configure the time between the DC and the workstations

  Thank you

  Windows Server forums:
  http://social.technet.Microsoft.com/forums/en-us/category/WindowsServer/

• Try to shorten the time between songs

  Original title: Media Player

  If I am using windows media player and create a list of songs to play how shorten the time between songs, so we can finish and the next songs will start immediately?

  Hey BillTolbert,

  Unortunately, there is no settings to do such things.

  It's common sense, the songs will be the next song to play won't take long to play.

  The next song begins to play as soon as the first finshes.

  Hopefully this should clarify your doubts.

  Good luck!!!

• How to set the time between slides in a slideshow (iPhoto, el capitan)

  How to set the time to say - 5 seconds or 20 seconds - between slide show photos in iPhoto. I use el capitan.

  See the Settings button at the bottom right of the toolbar (at the bottom of the slide show). Click on it and you have a small window with two tabes, refers to all the slides, the other to the selected slide. You can make your choice

• How can I measure the time between the two edges of successive increase, using digital input...

  Hello

  I'm trying to measure the time in seconds between each two successive rising edges on a digital input.

  So far I managed to detect the rising edge, increment a counter at each rising edge and take the time during which the increase is edge

  all I need now is subtract edge currently rising from the previous era of edge rising to calculate (T), which can be 1/frequency and display in real time for the user.

  but I do not know how to do this

  Can someone help me please!

  Note: while I am in a position varies between 200 ms - 2 seconds

  
  

• change the time between each photo in movie maker vista

  I am doing a slideshow using vista movie maker. I added music and it is great. BUT I can't change the length of time between each picture and the duration of transitions. I tried tools / options / and I can change out there, but it does not apply to my project. I also tried to do it manually but still no luck.

  Any help would be most appreciated.

  Maybe the following will help:

  The change of setting to: Tools / Options /.
  Advanced... tab applies only to the added photos
  to the timeline * after * you change the setting.

  If you switch to view "Storyboard" and select
  all the pictures in the form of batches (select one and the type...
  CTRL + A)... you can add the 'Speed Up, Double.
  or "Slow down, half" effect of changing the
  duration. Simply select all clips / right click
  the effect on the menu... Choose...
  Add to storyboard table.

  'Speed Up, Double' cuts the duration of half.

  "Slow Down, half ' double life.

  These effects can be added up to six times.

  If you need finer adjustment...
  the info may be useful:

  To the timeline, you can change the
  the duration for each picture manually. Drag the
  Garnish handle left or right to increase or
  reduce the duration. You can see a
  Tip displaying the change.

  Or... just to redo the project after changing
  the long-term: Tools / Options / Advanced
  tab.

  With respect to Transitions, see the following article:

  Windows Movie Maker Vista - add transitions and effects to pictures and
  video in Windows Movie Maker
  http://Windows.Microsoft.com/en-us/Windows-Vista/add-transitions-and-effects-to-pictures-and-video-in-Windows-Movie-Maker

  In some cases, you can add a transition
  to every other picture... What follows... explains why:

  This happens when the Transition is
  the same or greater than the length of the photo.
  This setting must be entered before add
  clips on the timeline.

  Tools / Options / Advanced tab.

  To add effects or Transitions to all clips
  at the same time... Follow the following steps:

  Go to the table of Storyboard view.

  Select all images. (click left one)
  and type... CTRL + A).

  With all the images selected... go...
  Transitions video and do a right click the
  You want to add, and then click on...
  Add to storyboard or type table... CTRL + D.

  It also works with the effects.

  Effects...

  The duration of the effects is not adjustable. As a work around
  to extend a fade in from black, you can insert a black solid
  .jpg that you can create in most image editing software.

  (FWIW... the intensity of certain effects can be increased
  If you right click on the picture and choose... Video effects...
  You can add up to 6 cases of effect)

  In Windows Paint (for example)... Open the photo / right click
  the black square in the color box and type... CTRL + SHIFT + N.
  (if you do not see color box... type... CTRL + L)

  (1) to save a photo...
  (2) go to... File / save as...
  (3) select a backup location...
  (4) enter a new name (which guarantees that your original picture is
  not overwritten),
  (5) choose a format...
  (6) left click... Record.

• Estimate the time between two computers

  Hello, everyone. I want to develop a program for communication between two ip addresses: IP1: 192.168.1.100 IP2: 192.168.1.101 Suppose IP1 is the server IP2 is the Viewer, then I want to put in place a program to estimate the elapsed time for IP1 contact IP2, but I don't know how to do. Also, I want to display the elapsed time for the connection (which varies due to fluctuations in the internet), performing actions such as continuously 'ping' the receiver from the server. Can someone show me the way to achieve this? Thank you very much. Best regards yukfai88

  Please do not shout

  How about using ping?

  Insert the output in an analysis of string to read the value you need. Sorry my OS is in German so you have to adapt ;-)

  

• Delay between VISA W/W and chain problem

  Hello

  I'm working on the documentation for the other VI. I had a question about the time between VISA W/W. I was wondering why we cannot put all the strings in an entry VISA and what is the purpose of having two writing here and the wait time of 0.1 s is critical?

  I had the problem of the chain where you can find it with three question marks of labelling in the .png file, I want to see what CHANNEL I get here, but when I add

  Here, an indicator of what I've got is a number instead, why?

  BTW, what is the meaning of integer 70, I knew is the number of bytes of data to read, but I got the exactly 70?

  Thank you

  The delay does absolutely nothing. I suspect that the original programmer intended to give time for the instrument to the installation before taking a reading. Demand of the measure and the delay come however in parallel.

  The number of bytes requested is a somewhat random number. You just want something big enough to get all the data in the buffer. It might as well be 1000 or 10000. Playback will be automatically terminated with EOI is affirmed by the instrument.

  The indicator displays a string, but the string is obviously digital before being converted into a DBL.

• Measure the time difference between a digital output and an analog input that responded to the questionnaire

  Hallo,

  I use the following system:

  • OR PXI-1044 with controller NI PXI-8109
  
  
  • OR PXI-2564 switch module to turn on the monitor of my test device
  
  
  • Data acquisition multifunction NI PXI-6259 to measure the signal that responded to the questionnaire jump

  The two cards are the same - PXI trigger bus. For both, PXI-2564 and PXI-6259 I use DAQmx to set the reading and writing of the channels.

  Now, I want to measure the time between the digital output, my unit turns and the analog input, which measures the response of my system.

  I can't do work by myself, please help me!

  I thank Ludwig.

  Hi Ludwig,.

  If you can't give us any VI we have difficulties with to help you.

  Because I Donat knowledge how your program is mounted it is not easy to know where you should enter signals.

  Here's a question similar to yours:

  http://forums.NI.com/T5/LabVIEW/best-way-to-measure-time/TD-p/178704

  and 2 external links:

  http://www.ehow.com/how_8698983_measure-time-LabVIEW.html

  http://objectmix.com/LabVIEW/385152-how-can-i-use-LabVIEW-measure-time-between-analog-pulses.html

• How to set the time difference between each data when using keithley 2400 scanning

  Hello friends,

  I use scanning Keithley vi the extent of SCANNING and acquire vi. I want to measure the voltage for each step and a pause between each two data, so I need a delay between each I step.

  I'm a starter to use Labview, thank you very much for your answers.

  Perry

  As Dennis says, if you use the built-in scan function, you will need to consult the manual. See Section 10-16 (this is page 10 of article 16, only paragraphs not but 10, 16) for the manual Keithley 2400.

  The Keithley 24xx series has a speed of measurement in units called PLC (Power Line Cycles). The default speed is 1PLC, which means a measure is taken with each cycle of line 1 power supply or 1/60th of a second (16.67ms). 24XX can range from 0.01 PLC (all 0.16ms) 10 PLC (all 166.6ms). The faster you measure, the less accuracy you get.

  To programmatically set this value, the command is

  ENSe:CURRent:NPLCycles

  ENSe:VOLTage:NPLCycles

  Depending on what you are sensing and where is the number of controllers from 0.01 to 10.

  Another factor that will determine the time between data points is the cycle SDM. These are more complicated, look at your Keithley manual for more information. Look at article 6 and article 11 for more information.

  Note:

  PLC times are based on a cycle of 60 Hz US.