Linear between two sliders from a signal of a NOR-instruments via the DAQ Assistant

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• Implementation of the linear adjustment between two sliders

  Hello

  I'm trying to implement a linear between two sliders fit as I am with altogether 4 sliders. I want to implement an adjustment linear between slider 2 & 3. Please help me how to implement and to find a slope. I also enclose my code.

  Hey Brad,

  Saw that you contacted me then here is the solution.

  In fact Cameron has already mentioned the solution above.

  In any case what it what it should look like when you implement it:

  

  Note: The while loop is just a claim that the output are not in the right order.

  Koen

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• In Labview 8.5, what happens if the input signal exceeds the scope of the signal defined by the DAQ Assistant?

  Hi all

  This should be a pretty simple question, but I can't seem to find the answer online and currently do not have the functionality to test this:

  I'm using LabVIEW 8.5 and have a VI that imports data from sensor through the DAQ Assistant. In the configuration tab, there is a range of signal input. What happens if my sensor exceeds this range? I get a warning? The default value is the maximum (or minimum)? I was interested in writing a code to display an error that I approach the limits of this range, but did not know if I also need to include code to display an error if the scope is exceeded as well.

  Thanks for the help,

  Tristan

  Hello, Tristan,.

  The behavior depends on the selected range and the device you are using.

  If you are using a device with a single input range is valid, we will use this range, even if you set a smaller minimum and maximum in the DAQ Assistant.  So, if your device only supports ±10V and you set the range to ±8V, you will still continue to get valid data after your top sensor 8V until what you approach 10V.  When you reach the limit of the extent of your device, the output will be 'rail', and simply return the maximum value until the signal is less than the maximum value again.

  Note: A device that is nominally ±10V usually has a go-around (such as ±10.2V) which are usually specced in the manual.

  However, if you use a device with several ranges of entry then things become more complex.

  NOR-DAQmx player will choose the smallest range that entirely covers the interval you choose.  For example, suppose that your device supports the following input range: ±0.2V, ±1, ±5V, ±10V and you choose 0V - 3V as the range in the DAQ assistant.  The NOR-DAQmx driver will focus on the input range and the list of the entry lines that your hardware supports and choose the smallest encompassing the entire range that you set.  This would be the ±5V, because this is the only beach that contains up to 3V.  Thus, all between ±5V input signal is returned and none outside this range will be 'rail' to the maximum or minimum value.

  We do this because using small beaches make more efficient use of the resolution of the ADC.  So, we try to use the most effective range based on what you ask without picking up a range that will make you miss data.

  Let me know if I can clarify it more.

• Switch between the graph and the table as in the DAQ Assistant

  I was wondering if it is possible or if anyone has any success making a user interface, such as the DAQ Assistant, where you can switch between a graphical output or an array of the recorded signals.  I would like to have this feature in my code .VI.  From now on, I'm just a waveform graph in my front panel.  I'd love to be able to alternate between this waverform table and a table of output values. I have attached a few screenshots to explain what I mean.

  Hello

  Personally, I like the TAB ideas that have been validated, but you can also use property nodes and the visible value.

  Good luck.

  Steven

• Simulate signals wired to the DAQ assistant for USB-6009 device

  Hello

  I'm trying to send a signal to the DAQ Assistant Express VI.  I watched the movie "Generating a Signal" on the Web site of NOR (www.ni.com/academic/students/learnlabview/generate.htm) and I have my Signal simulate connected directly on the DAQ Assistant, as shown in this film.  In my case, the DAQ Assistant sends the signal to a device USB-6009.

  However, I received this message:

  Error-200077 occurred to the DAQ Assistant
  Possible reasons:

  Requested value is not supported for this property value. The value of the property may be invalid because it is in conflict with another property.

  Property: SampTimingType
  asked the value: Sample clock
  You select: On-demand

  If I select 'On Demand' in my DAQ assistant and run the vi everything works beautifully.  However, I need my DAQ assistant to be configured to generate a waveform AC continuous, not output a single alternating current rippling.

  What happens here?  I did not have this problem before on other devices of NOR. I am using LABView 2010.

  Please answer.

  Thank you.

  double post

• Replacement of simulate signal VI with the DAQ assistant

  Hello

  I have a VI fucntioning, where signal comes 2 simulate VI signals and is being recorded.

  I replaced that with the DAQ assistant. I want to know if the wiring is correct and if it will give me the same result as the simulated VI.

  Thank you.

  Hello Andy,

  Thanks for the reply, yes I did that as well, another way to do it is the 'split signal VI' that automatically separates the signal into 2 channels, most of the high sons being Ch 0

  S

• How to find values between two months (from January to the month prompted)?

  Hello

  I need to create a filter on the name of the month. That is to say of January of the year for the 'guest' month of guest of dashboard.

  Ex: If I ask year and month of year in 2013 and March respectively. I should get values for Jan 2013, 2013 Feb and March 2013.

  I can't try one between because that it only works on numeric values.

  I can't have a number of months in prompt because this isn't the condition and I am not allowed to.

  I tried the below query report filter

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  But it's not working

  Help, please

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  If it is 11g then try to use the column twice.

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• Problem with difference of calculation between two dates from Monday to Saturday

  Hello

  I need help to change a function return number you dates, including Saturday hours (09:00 - 14:00), Monday to Friday (09:00 - 21:00);

  This is my code;

  CREATE OR REPLACE
  FUNCTION TEST2 (FECHA_INICIO DATE, DATE FECHA_FIN)

  RETURN NUMBER IS THE NUMBER OF HORASTOTALES;
  date the date;
  
  BEGIN
  If)
  SELECT date, to_char (date, 'DY', 'NLS_DATE_LANGUAGE = ENGLISH') dia.
  (SELECT to_date('FECHA_INICIO') + LEVEL - 1 date
  OF THE DOUBLE
  CONNECT BY LEVEL < = (FECHA_FIN - FECHA_INICIO))
  WHERE TO_CHAR (DATE, 'DY', 'NLS_DATE_LANGUAGE = ENGLISH') not IN ("SAT") THEN
  
  with t as)
  
  SELECT CASE LEVEL
  When 1 then greatest (fecha_inicio, trunc (fecha_inicio) + 9 / 24)
  to another level - 15 + trunc (fecha_inicio) / 24
  end fecha_inicio
  case connect_by_isleaf
  When 1 then least (fecha_fin, trunc (fecha_fin) + 21 / 24)
  Another trunc (fecha_inicio) + level - 3 / 24
  end fecha_fin
  of the double
  
  connect by level < = trunc (fecha_fin) - trunc (fecha_inicio) + 1).
  
  Select sum (more large (fecha_fin - fecha_inicio, 0)) * 24 horas
  in horastotales
  T
  
  WHEN TRUNC (FECHA_INICIO) - TRUNC (FECHA_INICIO, 'iw') < 5;
  
  RETURN HORASTOTALES;
  
  ) ELSE IF
  Return HORASTOTALES + 5;
  END;

  concerning

  Hello again,

  Using this function, which makes me ask properly, what hours, my problem is that I can not include Saturday hours;

  create or replace FUNCTION TEST (FECHA_INICIO DATE, FECHA_FIN DATE

  )

  RETURNS the NUMBER IS horastotales NUMBER;

  BEGIN

  with t as)

  SELECT CASE LEVEL

  When 1 then greatest (fecha_inicio, trunc (fecha_inicio) + 9 / 24)

  to another level - 15 + trunc (fecha_inicio) / 24

  end fecha_inicio

  case connect_by_isleaf

  When 1 then least (fecha_fin, trunc (fecha_fin) + 21 / 24)

  Another trunc (fecha_inicio) + level - 3 / 24

  end fecha_fin

  of the double

  connect by level<= trunc(fecha_fin)="" -="" trunc(fecha_inicio)="" +="">

  )

  Select sum (more large (fecha_fin - fecha_inicio, 0)) * 24 horas

  in horastotales

  T

  When TRUNC (FECHA_INICIO) - TRUNC (FECHA_INICIO, 'iw')<>

  RETURN horastotales;

  END;

  Example:

  SELECT TEST (TO_DATE (January 7, 2013 09:10 ',' DD-MM-YYYY HH24 '), TO_DATE (February 7, 2013 09:00 "," DD-MM-YYYY HH24 ')) horas

  OF THE DOUBLE

  output: 11, 8 hours

  Then try to add parts of your function, to get what I want, but it gives me compilation errors

• Collection of data from more than an instrument via the same labVIEW program

  Hello

  I have a program whereby I collect data on a scale of and save the data in the text file. Now, I need to collect data of three identical scales and save the data. I wonder if it is possible to do so in the same program? I mean how to manage three ports and save three different text files?

  I enclose the current program. Communication with the scale series and I use VI:s. thanks in advance for the help = VISA)

  

  This is easily possible with a single program, and there are several ways to do so.  I recommend the following:

  1. Take data from these devices in a separate loop (this could be in a separate - VI, as well).  These loops should be state machines if you can start and stop the acquisitions in a clean way.  This assumes that the instruments are on separate ports.  If they are on the same port, you probably want to use the same loop.
  
  
  2. Write to the file in a single loop.  This, too, should be a state machine.
  
  
  3. Queues to send data from the acquisition of loops to the loop of file I/O.
  
  
  4. Use still another loop for your user interface.  It must contain a structure of the event.

  To do this, you will need to learn more about the State machines and producer/consumer architectures.  Start with the help of LabVIEW, then search these forums.  There are a multitude of implementations of State machines and producer/consumer architectures.  If you have the time, I highly recommend you learn and to use the classes in LabVIEW (requires LabVIEW 8.2 or later).  This will facilitate your work in the long term.

  Let us know if you encounter any problems...

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  If there is everything that I could provide to help solve the problem, let me know!

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