Excel sheet entry to 'setpoint' of the PID controller

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  I'm trying to generate a humidity control using the mass flow controller. I have a USB moisture sensor. The reading of the probe are sent in a spreadsheet and converted string. The value (a string) is used to enter the value of the pv of the MIP? Is it achievable?

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• generation of Excel sheet

  Hello

  I want to generate the serial number and the frequency of the values in an Excel sheet. But I get the serial number and frequency down names and values at the top. I have attached the vi here. Please find. I want the s. n and frequency of headers high underrespective and values.

  Hi vipul,.

  the code was edditted his work as u wanted as u used the whole order in the loop has been reorganizing data and header as well so u Finally, received header

  now, the starting value get incremented each time and so there is no need to set the order in the loop, so for your reference without deleting the game order.vi I used a case of false and done a sixth death you can remove the order.vi set once u go through the code. I enclose her updated the code of his work like u wanted.

• The PID control

  Hello world.

  I wrote a program of temperature control in labview and used the PID Toolkit for it.

  The entrance to the PID is the measured temperature and the output is a PWM signal fed to a relay that turns heater on or off.

  The control works but I want the temperature to be stable within a range of + - 2%.

  Currently, the temperature varies more than that.

  IAM sure, this is the setting of the PID.

  Because I have not worked with regulators PID Iam not exactly how to tune my system.

  The best way I found is to zero I and D and make the system oscillate with P.

  The only problem is that the system of temperature is so slow that it takes quite a long time to reach the set point which in turn would mean a lot of hours of tests only.

  Now Iam just wondering if there is a faster way to set the PID controller?

  Thanks in advance,

  Best regards

  Michael

  I've used this method several times with slow heating appliances. It can take a long time to reach a stable temperature, but at least do not monitor constantly as he approaches this value.

  In figure 3.4, Yes, the Min value is the initial value that is stable. It is OK to start an initial PWM output of 0, which speeds up the process, if your radiator is already at a steady temperature (the temperature in the room).

  In general, the difference between the output of the first and the last values, better will be your control (you will get best results of going from 0 to more than 50% to 5%), but it will take more time to settle to a new value and of course you must ensure that you do not exceed the capabilities of your system. It's a good idea to have a separate alarm system in place that can cut power to heater if you exceed a temperature, especially if you plan to walk away from it until it stabilizes.

  To a fixed cycle, the system will not continue to heat up indefinitely unless you have a perfect insulation without heat loss - but, as I mentioned above, do not choose a value that will not cause the system to overheat.

• PID controller compatible LabView

  Hi all

  We have built an oven of automated test. It was decided that it is cheaper and more convenient to use a pre built the PID controller, however

  our task is to set the temperature of the oven by using LabView code, so the PID should communicate with the computer.

  I would be really grateful if you could give me a little advice if these controllers exist and where they are or it could be easier to use the box of DAQ + OR PID

  box tools + with external power supply + heating element power transistor.

  PS just to note, temperature range is not very high (20-200 ° C)

  All the best

  Alexander

  Hi Alexander,.

  When you talk about PID controller, there are two options:

  1 software based controller PID (you can develop using the LabVIEW PID toolkit)

  2. regulator based material PID... If you choose to have a PID of hardware in service, you must ensure that it can be used with LabVIEW, I know that what is your concern...!

  For most of these PID regulators (hardware) are an instrument of series (RS-232, RS-485 or MODBUS based) and which can be easily integrated with LabVIEW... no tool is necessary, but all you need is VISA functions or MODBUS library.

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  Thank you

  Lieven

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  Lieven

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  Hi Ben 64,.

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  Report generation Toolkit a buit in VI you can use for your fact condition, but its an add we toolkit to separate license.

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  Inserting an ActiveX container and select 'create a file object '.

  

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  «"" "Exceptional teamwork.»»"»

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• Insert new data to a new line in the same Excel sheet in continuous

  Hello world

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• How to reset the default mail program? When I click to send e-mail to a box of 'Contact us' site web or excel sheet spread with addresses e-mail, a new msn email opens.

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• Select the cell & Excel sheet

  I currently have hundreds of files that have 3 excel sheets.  Some files have been saved with the first worksheet open, others when the second sheet is open and some when the third sheet is open.  When one of these files is automatically opened it opens to the sheet that was displayed when it was last saved. I need to write a LabVIEW program which opens each of these files, formatting, makes sure that a1 is selected cell in each leaf and make you the first sheet is open when it is saved, so that it opens with the first sheet showing.  I'm new to ActiveX, but I already understood the formatting, and I do the formatting in worksheets 3.  I just can't understand how to choose which cell is selected and which sheet is displayed. Thanks for the help, Jeremy

  Try the attached VI.   It was adapted from:

  http://zone.NI.com/DevZone/CDA/EPD/p/ID/60

  I had to change the content of the cell on the worksheet that is desired to keep this sheet on top when recording.  You could probably just change an attribute (font size, etc.) if it is not desirable to change the contents of the cell.

  Note: the name of the journal that is selected on the front panel is the sheet that will be on the top of the opening.

• copy the file directory into an Excel sheet

  How can I copy the file names in a directory/folder to an Excel spreadsheet? For example, I have 200 files in a folder. I want to copy the title of all the files in an Excel sheet to better management and add notes. Thank you

  I received an email go, but I can't respond to this e-mail address.
  Here is my supplementary question:
  "Thanks a lot for your help."
  It's one more step.
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  Open the folder, and then select all the documents in question.

  Hold the shift key while clicking the right mouse button (shift + right click).
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  Is that what you meant? Please let us know.
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• Help update the values to modify files on Excel sheet

  I have an excel sheet containing a list of values that need to be updated daily. Cells that have values are related to certain cells in a separate file. The problem is that the file that gets my excel sheet is constantly updated values of as well as the file name. I want to create a macro that will be able to grab the values from the new file and update the spreadsheet I have. I tried to create a macro when you type the name of the file you want to the linked cells to, and she copy that and replace a formula that is already defined, so I'll be able to get new values. I'll show you an example below.

  Front of Macro

  Enter the name of the file: 12345

  (Part 1): = 'S:\MATERIALS\RAW matiere\ [135.xlsx] PURCHASE! $D $11

  During the Macro

  Enter the name of the file: 12345

  (Part 1): = 'S:\MATERIALS\RAW matiere\ [12345.xlsx] PURCHASE! $D $11

  (replaced the file name 135 with 12345)

  When I did that it worked, but my problem is that whenever I entered a new file name so that it is updated (for example 987), the cell would just update with the file I recorded the macro with (12345).

  If someone has a code VBA or other suggestions, I would really appreciate it! If you need me to explain more about this, feel free to let me know. Thank you

  The command of VBA macro to set the formula in a cell is:

  Range ("a6"). Formula = "= 1 + 1.

  
  This would create cell A6 of the formula "1 + 1 =", and the cell afficheraient a 2 it.

  Here is a full function VBA, you can use and customize.  Simply paste in your VBA Editor to use.  You can see the string which is the formula is to break with the prompting text in the middle.

  Void macroFunctionName()
  As Variant Dim promptText
  promptText = InputBox ("What number to the file name?", "Type number please")

  Range ("a6"). Formula = "='S:\MATERIALS\RAW matiere\ ["promptText & ".xlsx] PURCHASE '! $$D 11 "
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• using a lexar Flash DRIVE to work on excel sheets. I went to open the USB key that ive been using and he said: 'it must be formatted. "

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  Try to play on another computer. If she still wants to be shaped, it's game over.

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