Order of execution model

Similar Questions

• Y at - it a State chart type or the flowchart describing the order of execution process model?

  One of my clients asked me this question...

  I have a problem with a change in the order of execution in TestStand 4.1.1.  [he has improved from 3.1 to 4.1.1]  It seems that ProcessModelPreStep runs earlier in 4.1.1 to 3.1.  This causes our model of error because some required variables have not been set when executing.  I wish that was a big flow chart or a diagram of the State for TestStand.  Maybe it is and I don't know where to look?

  The reminder that you describe is a reminder of engine and is independent of the process template.  There is a list of all actions and their order described in the TestStand reference manual in Chapter 3 of the section called "step Execution.  You will see the action 11 is a reminder of previous step motor.

  P. Allen

  NEITHER

• Question of operation sequence - order of execution of events

  Hello

  Im a VI to measure the current and the voltage across a writing device.

  To do this, I increment the tension, and for each increment, I measure voltage and current.

  I send SCPI commands to feeding and the meter with GPIB.

  My question is: in looking at my code, it seems that there is no dependence on the data between 'writing of power' (top left)

  and "write meter", while doing everything first?

  The program works fine, but I want to make sure that it is not out of pure luck.

  I am a beginner and I would appreciate more your help and comments.

  Thank you

  Nicolas

  Miguel_F wrote:

  Hi htnicolas,

  Two possible options to control the order of execution are:

  (1) use the structure of the sequence. (I guess it's preferable)

  (2) pass a parameter of a Subvi to another. Not sure whether it is advisable or not, but I spent one Subvi to another error to control the front execution order.

  Hope that helps a little.

  Actually the structure of the sequence is the least preferred method to apply the operation.  Data dependence is preferred (using the error string)

  LabVIEW is a language of stream - for you new guys this means that a block of code can if run as soon as all its inputs are available it does not matter what block which is a sub.vi, a business structure, a loop of what anyone with a boundrary that you can wire an input value.  Without dependence of data there is no easy way to determine what is happening in what order and LabVIEW will even go up to run a greater number of them AT the SAME TIME that you have available cores.  (Multithreading is easy in LabVIEW)

  It has been that the code would run from the back to the front, but many things have changed with the new compiler and optomizer, so this is true if the code is changed during compilation.

• Order of execution

  Hi can I want to know the order of the functions in the diagram below. Although all the functions to receive data at the same time why the functions of top down when I see highlight execution?

  

  The answer to your question, is that the order of execution is "unknown", or "variable" or "unpredictable."  If you impose another system on it (like that LabVIEW uses to "highlight the execution"), another set of 'unknown rules' may also come into play.

  The principle of data flow said that examples like your run in parallel to the best of the ability of the system - on a multi-core multi-threaded CPU, they might actually run in parallel on separate nuclei.

  When teaching LabVIEW, I use an example where I create a parallel structure and ask students to predict the order of execution.  I ran the same code several times, and always the order of execution of the parallel lines varied.

• Control the order of execution of the init/release

  I have a small program that I write in LabView.  It has an API (one set of screws to wrapping the functions of the DLL to control a device).

  Other such programs in the Gayshop make liberal use of the structures of the sequence.  I understand that the sequence into LabVIEW structures are not usually recommended.  I am writing my program with the best style of LabVIEW (as far as I understand - I'm still a relative novice in LabVIEW).

  I found that I could wire together the error / mistake Terminal to create a data flow to control the order of execution and it works beautifully.

  However, there are some cases where it is not enough.

  Here is an example.  I hope that the answer to this will answer my other questions.  If this is not the case, perhaps that I'll post more.

  One of the first live I call is an Init function.  One of the last screw is the release function.

  The release function must be called at the end, after the rest of the program executed (in this case, it is after the user requests the stop).  It should be naturally at the end (or almost) of the error string in / out connections error (as it is currently).

  However, the error it receives, which will determine whether or not he will run, should be the output of Init.  Release should work even if something else has failed.

  I enclose a photo showing the problem, with most of the code snipped out (as exactly what is happening in the middle is not relevant).

  What is the elegant way to handle this in LabVIEW.  Is it really a deal for a structure of the sequence, or is there a way more pleasant or better?  How would you recommend handling?

  Thank you very much.

  BP

  I agree with what pincpanter said, more you will need to use the status of the function 'Init '.

  Note that you can ignore the error and make the merger within the Vi version if you wish.

  Steve

  

• Order of execution in ApEx 4.2.1.00.08

  Hello!
  
  If I get before the Application header (with id = 5) level process and page before the header (with id = 5) process, which one will run first?
  
  Is there a relationship based on id or there is another logic? I would like to understand general order of execution in the same area without manual testing and debugging data in both processes?
  
  Demand Express 4.2.1.00.08-related issue.
  
  RG,
  Damir Vadas
  http://Damir-vadas.blogspot.com

  Damir Vadas wrote:

  If I get before the Application header (with id = 5) level process and page before the header (with id = 5) process, which one will run first?

  Is there a relationship based on id or there is another logic? I would like to understand general order of execution in the same area without manual testing and debugging data in both processes?

  If you mean by 'id' 'sequence' then Yes, it determines the order. The order may not correspond to the components with the same sequence, so the best practice is to be explicit and give them values of different sequence to give the desired order.

  Use utilities > events Page to see the order of the rendered component and treatment in the report generator.

• Order of execution in a composite application and double ampersand

  Hello
  
  I had a doubt as to the order of execution of a compound query. As a general rule, I read his right to the left, up and down.
  I understand that once the value has been substituted to the variable must be explicitly undefined and all queries are working well.
  
  
  I'm confused by running the example below.
  
  1. when I run this example below that I've been invited twice .
  I guess once the results and which is assigned a value & & who should himself search for new value
  
  Select the function
  employees join jobs (job_id) using
  where employee_id = & who
  Union
  Select the function
  of job_history join jobs (job_id) using
  where employee_id = & & who;
  
  
  2. here in the example below, the value is currently not invited only once .
  . Is the lowest first executed query and if so why? Is there a special case in which this happens?
  
  
  Select the function
  employees join jobs (job_id) using
  where employee_id = & & who
  Union
  Select the function
  of job_history join jobs (job_id) using
  where employee_id = & who;
  
  
  the example below works fine with a prompt for value. Performs one of the *'& &' work as a single & *.
  
  Select the function
  employees join jobs (job_id) using
  where employee_id = & & who
  Union
  Select the function
  of job_history join jobs (job_id) using
  where employee_id = & & who;
  
  
  
  Help, please
  Thank you
  Jayshree

  Hi, Mary,

  to_learn wrote:
  Hello

  I had a doubt as to the order of execution of a compound query. As a general rule, I read his right to the left, up and down.

  Enforcement order has nothing to do with this problem.
  The substitution variables are resolved by SQL * more as it analyzes your order. I think he analyzes in order as it appears in your script, or on the command line as you type. Turn on "SET CHECK" to verify this.
  After SQL * more analysis of the command has completed, it passes the command (with replaced by their values for substitution variables) for the back-end, which compiles, and then only, executes the statement.

  I understand that once the value has been substituted to the variable must be explicitly undefined and all queries are working well.

  I'm confused by running the example below.

  1. when I run this example below that I've been invited twice .
  I guess the results & who is assigned a value once & who should himself search for new value

  It's true.
  Before you run the command, & which is not defined.

  Select the function
  employees join jobs (job_id) using
  where employee_id = & which

  Since & that is not defined, SQL * Plus asks you to give a value to it.
  After the analysis of this line, & who is still undefined, because you used a single &.

  Union
  Select the function
  of job_history join jobs (job_id) using
  where employee_id = & &whom;

  Since & that is not defined, SQL * Plus asks you to give a value to it.
  After the analysis of this line, & which is defined, because you used a double &. (Use the command SET to verify this.)

  2. here in the example below, the value is currently not invited only once .
  . Is the lowest first executed query and if so why? Is there a special case in which this happens?

  Yes, once, before running the script, & is not defined yet.

  Select the function
  employees join jobs (job_id) using
  where employee_id = & who

  Since & that is not defined, SQL * Plus asks you to give a value to it.
  After the analysis of this line, & which is defined, because you used a double &.

  Union
  Select the function
  of job_history join jobs (job_id) using
  where employee_id = &whom;

  Since & that IS defined, SQL * Plus, do not stop and ask you to provide a value for it.

  the example below works fine with a prompt for value. Performs one of the *'& ' work as a single & *.

  Yes; but I don't think it's a very useful way to think about. In fact, two of them work as single & s one way or another.
  Once again, & which is not defined at this stage.

  Select the function
  employees join jobs (job_id) using
  where employee_id = & who

  Since & that is not defined, SQL * Plus asks you to give a value to it.
  After the analysis of this line, & which is defined, because you used a double &.
  Using a single & cause also stop and ask. If the variable is not set, SQL * more stops and you request a value, regardless of whether you have used a single & double or &.

  Union
  Select the function
  of job_history join jobs (job_id) using
  where employee_id = & &whom;

  Since & that set, SQL * Plus you do not give a value for it.
  Using a single & would also result in the same behavior. If the variable is already defined, SQL * Plus, do not stop and you ask a value; It uses the previously given value, regardless of if you have used a single & double or &.

• Order of execution for explicit file dialog boxes and query the user input dialogue

  Hello

  In my VI I use 1 and 2 express file dialog boxes prompt the user for input dialogue box. Y at - it any easy way to determine an order of exuction for these express dialog boxes? Or I have to use screws to notify?

  In fact, I just need the input of fo dialogue to prompt the user to be the first.

  Thanks for the tips!

  Martin

  Like most of the functions, the flow of execution can be set by plugging the error / mistake on clusters.

• Control the order of execution on a single page?

  I have been using cflock by mistake thinking it was for this purpose. Here's my number; I have an action page that accepts a JPG of a download file of a form field, and then runs the image via a custom tag ImageMagick twice (once to resize a thumbnail for display and once for resize/create), THEN the page is used to download 2 images on our remote server / backup.
  I inserted a cfloop that counts 6000 as a time stamp (see code)
  My problem is that the PCTCT begins to send the file uploaded before the tag of ImageMagick even to start his routine on the image, then is interrupted mid stream. The result is a server has a perfect pair of images, and the other Gets a perfect thumb and an original regular size truncated. It is unstable, but boring.
  
  Is there a command type cflock to frame commands on a page so Traoré progresses down the model only once the previous function is finished? I'm thinking old school "while" type of order, but I don't know where to start. Also, the file is renamed during the download (to avoid conflicts) to check if the file exists would not give the truth on resize is complete.

  Thanks for your reply, it is certainly a good idea. I modified the code to include a list of cfdirectory to check that the file exists and have also added a 'hold' for the first download to folder. Then the cf_magik will enter from there, resize and put the new & in their respective folders - in this way as an image thumb unresized cannot be FTP'd, because the auditor will not find the original of this record. I'm still using a cfloop, but only as a way to cycle trhu check the directory for the file:

• How to order the execution of the task

  Guys,
  
  I have a scenario where I need to get three spots on the response of some other task.
  For example on the 'C' of task1 answer, I need to fire task2, task3 and Task 4.
  
  so I made these 3 tasks as response generated on task1. But the execution order is not maintained.
  
  I want to start one task in front of the other..., no idea how to follow that.
  
  Thank you
  Suren

  Assume that Task1, task 2, 3 task must be run on the task response > Create User.

  Command must be Task1, 2, 3.

  On the response of the task of the user to create tie your tasks all 3.

  Now 3 task should depend on Task2 and Task2 should depend on Task1.

• Order to internal model with cRIO, synchronization of time loop

  Hello

  I work with control design Simulation & toolkit and I want to implement an internal model control to a real-time target. I want to implement my simulation (as an attachment) to the real target (cRIO-9024 OR cRIO-9112). I removed the transfer function of the process, I broke the line and I added my input/output of the cRIO modules. I put a 1ms, Euler ode solver step size and synchronize the time loop. Unfortunately it does not work properly. The loop decreased the speed a lot and I can't get 1 ms response time and, finally, a good answer for my system. This means that I can not 1ms response for loop? What is the problem of the computer, windows or hardware real-time or software? Simple or I did something wrong? All the advice you will enjoy.

  Kind regards

  Kamil

  
  

• How to determine the order of execution of the structure of the event

  Hello world

  I have a structure of the event were it contains four events. All the four events a separate buttons to run. Here, three events generates a digital output, remains an event (Finder) should find the order of these three events. For example, three events namely A, B and C. I run events in the order B, C and has. The event finder should find the order of the events previously performed (B, C and A).

  Thanks in advance.

  
  

• Order of execution in one step

  I'm relatively new to TestStand, and I am trying to debug a problem with a file of sequence.

  I have a stage, which is a .NET adapter (not sure if it's perhaps relevant).

  In these properties in a loop has been activated, and a post term has also been defined.

  The term post will run at the end of each iteration of the loop or just once, after that the loop has repeated 5 times?

  Thanks in advance.

  Andy

  Look in the TestStand reference manual in Chapter 3 in respect of the execution of the step.  It should be pretty clear.

  Start > all programs > National Instruments > TestStand > Documentation > manuals > NI TestStand Reference Manual

• Order of execution with waveform of reading

  I'm trying to find a way to control the order in which the sound files are played when Set up like that. It does not run them up and down as I thought it might. How can I control this order? Im sure that there is a better way to connect as well, I'm just not sure how. Maybe this will make finding in the order that the files are read more easy? Thank you enjoy VI attached below

  As you have just discovered, LabVIEW is an inherently parallel language, governed by the flow of data (data travel through wires, usually originating and Destination).  To ensure order, you use the data flow.  A particular thread that many beginners, including you, often ignore is the error line.  Most of the screws, including the screw Express in your example, have an error and output error.  If wire you the error Out of an Express VI to the error in the second and his Out error to the error of the third and his Out error to the error of the fourth, the sounds will play in the order 1, 2, 3, 4.  If you change the wiring in/out Error, you can change the order of sound presentation.

  Bob Schor

• Order of execution within the fieldChanged()

  In the following code example, the EditLead() function is executed at the same time as a dialog box that displays above it.  However, I want the dialog box to appear only after that I left the EditLead() function.

  Any help will be greatly appreciated:

  ' Public Sub fieldChanged (field field, int context) {}

  If {(field.equals (customObjListField))
  selectedIndex int = customObjListField.getSelectedIndex ();

  If (rows.getEmployeeId (selectedIndex) .equals (employeeId)) {}
                 
  UiApplication.getUiApplication () .pushScreen (new EditLead ((Hashtable) tableRows.elementAt (selectedIndex),))
  urlPostField,
  selectedIndex,
  customObjListField,
  lines));
   
  Dialog.Alert ("test");
                       
                 
  }

  }
  }

  Thank you

  Steve

  As an alternative, instead of using pushScreen, you can use pushModalScreen, which blocks until the EditLead screen is closed.