Similar Questions

• Simulate the sine wave using LabVIEW FPGA with NOR-myRIO and display in real time

  Hello

  I'm relatively new to LabVIEW FPGA. I am trying to test (and later apply) controllers high speed on myRIO.

  At this point, I'm trying to simulate the sine wave from 1 to 10 kHz using Sinewave generator VI express. I also intend to display the sine wave on the time real (RT) using FIFO. However, I had a bit of trouble to understaing various synchronization parameters.

  1. how to encode information about the sampling frequency generating sine wave? (The side FPGA vi requires only the frequency of the signal and possibly phase and does not rate update lines)

  2. how to estimate the number of items in a FIFO? (that is, the relationship between the rate of updates to loop (RT), the signal frequency, sampling frequency and the number of items in the FIFO)

  It would be great if we could share a very simple program (side host and target) that did something similar.

  Thank you

  MILIN

  Milot,

  I think the problem is the type of data in your FIFO. Your FIFO is configured to use a data type of I16. The problem is the number, it displays only ever will be-1, 0 or 1. To resolve this problem, you must send the sine wave as a fixed point data and convert it to a double on the side of the RT. This should significantly improve your resolution.

• How to connect incremental encoder to NI9411?

  Hello
   
  I need to connect an incremental encoder to a NOR-9411 digital input on a chassis cRIO module to use for high-speed triggering.  I'm having trouble to know how to connect the wires needed to the encoder until the 9411 correctly.

  The son of transport the following signals:
   
  A red
  B Green
  Z Brown
  + V blue
  OV-Orange

  I'm fairly inexperienced with the connection of the sensors to LabVIEW gear, then please let me know if I can provide more information on my installation.

  In addition, attached is the datasheet for the encoder.

  Thank you very much!

  Alex

  Hi Byrd,

  Thanks for the post and I hope that your well today.

  I'm afraid I'm not totally sure what is your problem.

  The NI 9411 manual can be found here: for additional reading.

  The manual explains how to connect unbalanced devices on the 9411.

  page 12:

  "An example of asymmetrical device is an asymmetrical encoder. Connect each of the encoder signals (phase A, phase B, and)
  the index) to one of the pins in a pair of pins of DI. Figure 5 shows the connections for an asymmetrical encoder. »

  In labVIEW, you can then create a DAQmx task to read all digital lines.

  Hope this helps to get started you,

• simulate induction motor starting with labview online

  Hi all

  I want to simulate induction motor in line beginning with Labview. I installed labview control design and simulation, simulation interface toolkit 2009

  No, because I don't really know what you're doing.

  What you're faking?  So far, what you wanted to do is how to "simulate" turn on an engine.  A motor is either on or off.  If you have a Boolean value which would lead to a digital output which would drive away a contactor/starter motor if you had one of this material.  Since you do not, all you can do is put a Boolean indicator on your façade.

  You want to simulate these sensors entries as well?  Then put a few orders of front that you can adjust you can replace later with the signals from these sensors.

• reset of incremental encoder

  Hello, this is a simulation using Labview 2011 years USB-6009.
  the table contains X (angle of encoder incremental counting rising edges) and Y (distance of linear encoder simulated with random numbers).
  The wheel is gradual and must be zero so every 360 points (X), the XY graph must be refreshed to show the last values 0-360.

  Nickname:
  If count > 360 then set I = 0 and turn, write another 0-360 array and record all comparison tables

  Question:
  Is a function box to use or two nested for loops with 2 counters, one up to 360 and the other until the overall value?

  In normal programming, I would divide the total number of 360, if the remainder is zero, then I would reset the meter I have zero, but I don't know how to "translate" in Labview.
  Thanks for the suggestions

  George

  Some points to note:

  feanorou wrote:

  Nickname:
  If count > 360 then set I = 0 and turn, write another 0-360 array and record all comparison tables

  Since 360 = 0 the code must be: If count > = 360... 0-359, 9-small but mean difference

  The function you're looking for is the

  Quotient and remainder function

  Have the Palette: Digital features

  Request: Basic package

  Calculates the whole quotient and the rest of the entries.

  Another useful thing is the shift register (see the tutorial of LabVIEW) you can use in your loop to keep a tachometer. Every time that Exchange (increase) you can save the update etc.

• How to find the velocity of an incremental encoder

  I use the RE22I encoder which can give up to 8192 pulses per revolution, I have A, B, Z reports that I use an fpga as a controller Please help me.

  How to find the speed of the encoder using these signals I'm going to have a clock in the fpga sysytem will help.

  Start by looking at the information on Wikipedia on the rotary encoders and a book on encoders OR white.  These articles will give you a basic understanding of the encoder and the signals it produces.

  With proper decoding, you can get the direction and momentum of each of the points on your encoder 8192.  If the tree can reverse (same vibration on one point unique all-in-mnearly stationary), full decoding must be used.  If data are only of interest while the tree turns in a direction and speed will not close to zero, a simple decoding can be used.  Decoding of a quadrature encoder is a good way to learn to use a state machine.  Signals A and B can exist in only four possible combinations, but the possible transitions to do interesting things.

  Define DECODING is a purely logical exercise and it is a simple coding in LabVIEW, such as a state machine.  There are examples, Desing Patterns, or project templates (depending on your version of LV) that come with LV to help you get started.

  By using the channels A and B you can update your calculation of velocity 8192 times per turn.  With the help of Z you get only an update by the revolution. You use depends on your application.  The pulse of Z is also useful to define a reference position for the measurement of phase angle.

  Lynn

• control of linear actuators Zagarella with labview

  Hello

  am new to using Labview-{3 weeks from May 31} and I would like to order three linear actuator Zagarella to operate from one stage of translation / linear in X-Y-Z.

  All the advice to know where to start

  Best regards: mansad:

  1 study the Zagarella manual on how to control, or what type of motor/encoder it uses.
  2. Select controller that supports the type of motor/encoder: http://sine.ni.com/np/app/main/p/bot/no/ap/motion/lang/en/pg/1/sn/n17: motion, n24CI, n1:10209.
  3. refer to help > find examples > Input and Output material > Motion for an example.

• How to simulate a right-click in LabVIEW

  I write code in LabVIEW to record the activities of the mouse for example move, click on the mouse and the right click of the mouse to the left.  I'm able to reproduce the movement by dragging and click of a mouse., but the right click of the mouse to the left.  Can someone show me how to simulate a RIGHT mouse click in LabVIEW?  Thank you very much.

  Son

  Have you looked into the case of the structure of the event time-out?

• wanted to know on how to use labview to get the values of the Spectrum Analyzer?

  Hi all

  I am a new Member and I am doing a project I have to see the performance of the DSl cable (lasting different for example 100 m, 200 m) on the Analyzer of spectrum and its values as graphic, food, BW should be get in excel sheet. I the company Rohde and Schwarz Spectrum Analyzer, I use interface GPIB 82357 B Agilent... If anyone can help me how to start. I plugged GPIB to spectrum and its drivers on the computer...

  Thanks in advance

  Patricia

  @Dennis Knutson

  I did not choose, he gave to me... and I have to work use only... no other choice...

• Rigid body position and Orientation control via screen Simulator

  Hi all;

  I want to simulate a robot manipulator a LabVIEW Module of 2013 robotics.

  I watched a video on YouTube and get a few question marks.

  The link is here

  In this VI, the desired position and orientation of the definitions effector

  is obtained via the Simulator window

  First;

  I want to know How can I control the position and orientation of a rigid body through Simulator display with a mouse?

  Thank you for your attention

  I asked around and it looks like our team in Shanghai may have the code that was used in the video. I'll let you know what happens in the next few days, we have an example of community in the works.

• Choose ISE or Vivado Xilinx tools for a specific compilation of FPGA

  Hello

  Is there a way to specify what version of Xilinx Compilation tools to use when compiling an FPGA VI? I want to try the version Vivado tools rather than the version of ISE to see if there is an improvement. I have listed some information on my setup below.

  It's my current setup:
  NI5772 / PXIe7966 digitizer and FPGA
  SMU-1082 chassis
  SMU-PCIe8388 / SMU-PCIe8389 controller
  LabVIEW 2014

  In the past, I used the LabVIEW 2014 FPGA Xilinx tools 14.7 Module to compile my code. But I also want to try the version of Vivado, "LabVIEW FPGA Module Xilinx tools Vivado 2013.4 2014', to see if it gives better results."

  Page-based "compatibility between tools Compilation of Xilinx and FPGA hardware OR" here:
  http://www.NI.com/product-documentation/53056/en/
  Looks like the PXIe7966 FPGA must be compatible with the tools of Vivado 2013.4.

  I tried to uninstall the version 14.7 ISE tools, and install the 2013.4 of tools Vivado (so Vivado 2013.4 tools are the only xilinx tools installed on the computer). But LabVIEW complains that the ISE 14.7 tools are not installed and does not compile the FPGA VI.

  Thank you!
  Michael

  This FPGA is a Virtex-5 FPGA, so you're stuck with ISE.  You need a card FPGA that either uses the architecting chip (I think it was only in cRIOs) or 7 Kintex to use the compiler to Vivado.

• cDAQ-9178 & NI 9401 - ASM: incremental Rotary encoder works is not beyond a certain frequency

  I use a chassis with a NI 9401 DIO module 9178 cDAQ.  I'm trying to convert the output of a rotary incremental encoder ASM (in radians) to rpm.

  Sensing head (PMIS4-20-50-240kHz-TTL24V-Z0-2M-S)

  Snap ring (PMIR7N-20-50-M-20)

  The encoder outputs 2500 pulses per rev (output 5V TTL).  The maximum speed which will see the encoder is 2800 rpm, which is equivalent to 2800 RPM * 2500ppr/60 = 116,667.67 Hz in terms of frequency.

  Since the NI 9401 of the operations specifications:

  Maximum of the input signal switching frequency by the number of input channels, by channel

  8 input channels... 9 MHz
  4 input channels... 16 MHz
  2 input channels... 30 MHz

  I use only 1 channel, so I'm assuming that the 9401 should be more than capable of handling the 116kHz which the ASM encoder is spit.

  Everything works fine until about 2100 RPM (~ 87, 500 Hz) but then I begin to see a drop in rpm, followed by a flattened behavior, then a slight increase. But never more than 2100 RPM.  Our test unit is inspected for other reasons at the moment so I can't produce a plot of the behavior (I can reupload later).  I think this must be a matter of aliasing with the meter or something of the sort.  I have a digital filter set in place with a minimum of 4.0E pulse width - 6.  It is two times smaller than the width of minimum pulse at a frequency of 116kHz (0.0000085714).  I don't think this should have an impact on the calculation.

  Any suggestions? This value of RPM is essential to our application.

  Thanks in advance,

  -MB

  brown_ktr wrote:

  I have a digital filter set in place with a minimum of 4.0E pulse width - 6.  It is two times smaller than the width of minimum pulse at a frequency of 116kHz (0.0000085714).  I don't think this should have an impact on the calculation.

  A 116 kHz frequency, the period is ~8.57 us, but the pulse width half duty cycle of 50%.  Ascent/descent time factor, and it is quite possible that 4 US is too long for your encoder signal.

  The shape of this graph supports this theory, if we consider that there is variation in the exact pulse of each encoder pulse width.  The shortest pulse is ignored when the filter starts to kick in, and the speed of ROTATION increases pulses longer and longer are ignored then as well.

  Try to decrease the minimum pulse of digital filter (US 2 or even 1 US) width and see how it goes.

  Best regards

• 6009 USB + encoder Lika I41 - how to connect?

  Hello world

  I'm new to this forum and I'm new to Labview so. I started to learn a few weeks ago and I have to solve a few problems. I am not able to come up with my own, and that is why I ask. I went through very simple LabView courses and now I'm in more serious trouble.

  I have first - the NI USB-6009 device and an incremental encoder Lika I41-h-500ZCU46L2. He has 8-cable and is described here: http://www.lika.pl/pliki_do_pobrania/QR%20I28_I40_I41.pdf . And now - I know the basics on the encoders so the description of cables is understandable to me. I don't know how to connect it to the USB-6009? I need to do a VI that will count the pulses and the output of the camera each X impulses. But I want to start by counting pulses.

  Any help will be MUCH appreciated.

  P.

  Hi you can connect power 5V to encode. Connect to the encoder output to PFI0 encoder for the event USB6009 GND GND line do VI count on PFI0 and USB6009.

• How to wire the NI 9422 module to an encoder?

  Hello

  I want to connect the NI9422 to an encoder.

  The encoder data sheet is:

  http://MDM.KPNO.NOAO.edu/TD/PDFs/bei/H25_Incremental_Encoder.PDF

  Eager to help on this.

  IM using cRIO 9024 and my encoder is BEI H25D-SS-512-ABC-7830-LED-EM16-S

  Pinout for encoder is:

  A > A
  B > B

  C > -.
  D > + 5V

  E > B -.
  F > 0V

  G > matter on the ground.

  Thank you.
  R.H.

  Hello

  I think you should use 9411 (http://sine.ni.com/nips/cds/view/p/lang/en/nid/208812) module because that differential digital inputs. Looks like you have the wrong module to use. Your incremental encoder has A +, A - and B +, B-requiring differential inputs. 9422 is a digital input module 8 channels for 24V to 60V input logic level, that does not meet your needs, and it is also not entered differential.

  If you have the correct module, then perhaps you can visit this page to learn more?

  http://www.NI.com/white-paper/3921/en

  Rando

• Enum with controls external increment/decrement

  Hello people

  I have an enum in my Subvi with close to 3 or 4 choices, I want digital control (push button) of wire to my DAQ hardware in order to to use to press the increment or decrement of this enum (switch between choices), I searched for a node property to do so, but without success.

  Basically, at the moment I want to simulate this using a command button front button (for example) a boolean.

  Thanks in advance

  Here is the most common case where ask you the digital input (simulated as a switch to the released button as a car horn ).

  

  (As I said, the enum must be done a typedef, of course)