Why the producer s Comsumer loop transfer '0'?

Similar Questions

• Why the outputs that are grouped in a waveform chart in a loop of Simulation show distortion?

  Is anyone know why the outputs that are grouped in a graphic waveform distortion to see the Simulation loop unlike these forms of output wave that are placed individually in each waveform graph Microsoft Graph?

  
  

• Cannot terminate everything in a loop to the producer/consumer

  I have attached a simple vi which was built from the producer/consumer (events) model.  In vi I set up a counter.  I want to be able to complete the meter when you press the stop button.  This does not work as expected.  The meter goes to its full count before the program stops.  The vi works as expected when run in execution to highlight mode.  Cannot understand it.

  Thanks in advance.

  Race condition.  No matter what time something behaves differently with that highlight run it at full speed, and suspect it is a problem of synchronization due to a race condition.

  As soon as your producer loop has the command queued up, she is ready to handle the next event.  If you press the stop button, it is ready to deal quickly and the stem while the ends of the loop and Stop immediately gets back to false.  This probably happens before the loop of consumer has the opportunity to read the local variable of the button stop in the moment, it's true.  Have your consumer while loop redefine the Stop button to false instead ensuring consumer loop has a chance to see if it is true.

  

• Convert single while loop with variable Timing literal to the producer consumer

  I have a controller for a biological system that updates every n minutes or every minute 2n, under certain conditions. My app has a synchronization controller calculates if the current iteration is n or 2n and feeds the output of this calculation in a loop of "Timing" VI in my all. If I understand correctly, this is similar to the issuance of an order of sleep() in a language similar to C and should be avoided. I'm refactoring my code and I heard that they are well suited for this kind of things. Here's how it should work:

  1. Loop begins at the time T, T is saved.
  2. Schedule controller runs and calculates if loop will get minutes 2n or n minutes. This controller will take a number of milliseconds to complete, so we are is more to time T.
  3. Now that the update interval (n or 2n, let's call it u) is known, the loop must until T +u fill.
  4. The PDC is executed, but a number of milliseconds to execute.
  5. The rest of the time until the next iteration of loop should produce the CPU for other processes.

  It sounds to me like it's the kind of a real-time system, although as long as we are in the minute of the original deadline, there will be nothing wrong.

  What the producer-consumer loop would look like? Assumed that the synchronization and the main order controller are separate from the VI.

  
  

• Records were left on the old HD after a transfer to the new HD.

  During a transfer of my old HD to a new library LR HD couldn't move a few files containing photos (5000) residing on the old HD, producing error messages during transfer by saying that the photos could not be moved.

  
  

  (For the purpose of the present explanation, I use a folder of the year 2003 'AMEXIT' containing subfolders that are relevant for this discussion.)

  
  

  Here is the list of the OLD HD after the transfer, list 2 of only 4 files that have been moved successfully with many others who could not be moved to folders:

  

  (Note that all of these folders contain the same type of file)

  
  

  Here's the HD NEW registration file, showing the 4 files that have been moved:

  

  Still, LR moved only 4 records of the year 2003 and left for other good account. If I try to move all the others in the new HD, (i.e. a named RALEIGH1), I get this message:

  

  Obviously, according to the LR folder list, it does not contain RALEIGH1

  
  

  The finder window MAC shows that LR DID create the folder RALEIGH1 in the new location, but it is empty.

  Use the MAC finder, I deleted the empty folder from RALEIGH1 to the new HD and copied to the RALEIGH1 of the OLD HD to the new HD and then tried to import this file BACK into the LR catalog.

  Here's what happens:

  

  Even if LR now see the folder on the NEW HD, pictures are grayed out and LR will not allow the import in the catalog.

  I guess that LR believes he has already all the photos in the new HD. However, the list of folders to the NEW HD still shows only 4 files as seen in the second picture above, me not allowing no access to the files and pictures that are clearly on the NEW HD

  How can I get these files appears in the LRCAT and why did they not move successfully in the first place?

  Import photos that have already been imported is never the answer.

  As you said that you copied pictures on the new HD (and they are in a folder of the same name), then you should reconnect the photos inside Lightroom. Find files on your old HD in your Lightroom library Module (left, in the Control Panel folder) and then use these instructions (scroll down to the section called "Update folder location")

  Adobe Lightroom - find moved or missing folders and files

• Why the songs on my iPod constantly repeat?

  Why the songs on my iPod Nano are continually repeat?

  The last week or so, what song will repeat until what I hit the next button.

  You have probably enabled the repeat a parameter.  If your iPod nano has a touchscreen (6th gen or 7th gen), the setting is on the now playing screen.  Setting repeat button looks like two arrows in a loop.  When the value Repeat One (repeat current song), there is a small '1' on the symbol.  Tap to set Off repeat or repeat all (repeat current list).  This is the guide of the user for 7th gen nano

  https://manuals.info.Apple.com/manuals/1000/MA1624/en_US/iPod_nano_2015_user_gui.PDF

  See page 19 for more information on the songs repeat.  If your iPod nano 6th gen, it is similar, but you may need to drag the current playback screen to see the repeat button.

  If your iPod nano is older, with a wheel, please after return.

• Why the apple customer service has disappeared down the Hill?

  I have had 3 iPhone of 6 to any faulty transmission, 11 months later today that I just picked up at the Metro centre apple Store, got it home that is also defective. been on the phone now for more than an hour trying to sort, 1 transfer to blind a ringtone that after 50 minutes, was cut. pay for a mattress brand expect top service something apple seem to have moved away from.

  Time to go I think!

  I have not seen any decline in Service to the customer. Defective phones would be something in the quality control, if you are looking to blame. The customer service is what exchanged your phone, and since they exchanged their, then it would not be bad service. However, you would need describe "defective" for the replacement of the latter. Given that you were on the phone with Apple, it looks like they may have been going to work on it. Not sure why the call may have abandoned well.

• First try the producer consumer Architecture: continuous play and dynamically update settings.

  Hello

  I am currently working with two instruments; an Agilent E3646A and a NI 6212 BNC. My goal is to have the 6212 continuously take measures according to predefined parameters while the E3646A parameters can be continuously updated. This combination simple instrument aims to help me learn the manual architecture; continuous measurement, output dynamic controls and instruments more will be added in the future.

  I've already posted on a similar, but more complicated configuration (http://forums.ni.com/t5/Instrument-Control-GPIB-Serial/Split-second-lag-when-controlling-two-instrum... and was advised to try the producer consumer Architecture.) I found the documentation on the website (http://www.ni.com/white-paper/3023/en/, https://decibel.ni.com/content/docs/DOC-2431), searched the forums and built my own VI. While my first attempt at a producer consumer Architecture has solved some of the problems I had when I posted on the subject, however, new questions have been raised regarding the reading and adoption of the VI.

  I am currently able to run the VI and update the settings on the device. Previously, I'd get a freeze while the instrument has been updated and could not switch settings until it was done. This has been resolved, although that reading updates only when a parameter has been updated, although it is outside the structure of the event. In addition, the Stop button does not in any context. I also got occasional mistakes on the part of Deqeue, but the major part of the sentence is error-200279 'A tried to read samples that are no longer available' to DAQmx Read. I realize that there is a problem in my loop of producer but have not been able to find a way to solve it.

  This is my first attempt at a producer consumer Architecture and already I can see that it is a powerful tool. I read as much as I could and looked at examples, but should have some problems at the beginning. Would be very grateful of any advice so I can take full advantage of the architecture.

  Hope to hear from you,

  Yusif Nurizade

  You're going to overflow this buffer, unless the events are generated faster than "sample rate/number of samples.   Period.  Nothing could be simpler.

  You don't need a local to stop your curls.

  Try something like this attachment.  I simply moved the structure of the event in its own loop dedicated since it had nothing to do with acquiring data at all.

  Data acquisition loop stops very well when you destroy the task and destrying the stops of power queue (sending the default values of the queue for the power control) for EXAMPLE, to ADD a group of setting 'Safe shutdown' to a 'package' and it wire to the Center terminal (Prototype).

• Structure of the event in timed loop

  Quick question on the structures of timed loops\event

  What is a good or a bad idea to use structures of event call loops - as opposed to while loops. ?  I guess I like the idea of call loops - because you can prioritize them - so if there are some important things you need priority of 100% in the background - but for the user interface, you can configure it to run slower\or run to a different priority level.

  I just wanted to check it is not a reason why I shouldn't do that - since all the examples don't do that.

  JP

  I don't think it's a good idea. Your timed loop can stop waiting for an event. There is no advantage of placing the structure of the event in a timed loop. It is possible to assign priorities to other objects outside of the call loops. For example, you can the priorities given to subVIs. I'm reasonably sure that the structure of the event can work at other priorities if you do not the activities of the user interface. Maybe someone of NOR can confirm this.

  But the goal of a timed loop is to have a deterministic periodic job. The structure of the event must be used for asynchronous events. The two disagree with them if they are in the same spot.

• Subgroup of experts can pass events to the top-level event loop?

  I'm working on a VI that may have up to 1000 controls (Yes, she really need that much).  To reduce the size of the user interface and increase the modularity of code, I partitioned design into subgroups that are loaded in tabs.

  Subgroups are responsible for:

  "VI reference to open"--> "invokes the method: Run VI '--> ' invoke the method: Insert VI»

  (Sorry, I don't know how to incorporate images here, yet)

  The upper level has some of its own controls in addition to the case of the Sub-group of experts, and it will be built on the design of producer-consumer model.  The loop of consumer manages the interaction with the hardware (write-only).  Each sub-group of experts will also have its own event loop to manage coordination of the user interface within the Sub-group of experts and also a preprocessing of data that results from the activity of the user within the Sub-group of experts.

  Here's the problem: go in the subgroup of experts, how do I pass an event up to the top-level event loop so that the hardware access request can be entered into the queue of the consumer?

  At first it seems I could solve this problem in two ways:

  (1) rather than to use an Invoke node to insert the Sub-group of experts, is it possible to connect the frame of the Sub-group of experts against a VI that is instantiated in the block diagram?   If there is, I can simply use dataflow to bring jury secondary to the upper level events.   But for now, it seems there is no way to have a subgroup of experts except by using the Invoke node.

  2) there is another way, that we have found, but this is an ugly hack. The reference to the 'Open VI' VI using, I use ' call method: control value: Get.  Gives me the value of a control in the Sub-group of experts, but there is no case of signaling, so I have to resort to polling stations, which slows down the user interface and breaks the model "Event Loop".

  Y at - it of other ideas for how to get events from the Panel under treaty to the next level?

  (of course, this isn't * all * the events we manage.)  The Sub-group of experts will actually a pre-treatment and then send only the selected events to the highest level user-defined)

  Thank you and best regards,

  J.

  I have not used the secondary method before, so I can't save what I think with real experience.

  But,

  If the Subvi who is put in a secondary control on front panel for a queue reference, I think you'd be able to do the Invoke node to set the reference queue control before calling the functioning of the VI.

  The other idea would be do not to have a reference of queue control to pass.  But use named queues and leave the Subvi in high school to create its own queue reference based on the same name that was created in the main VI.  When it ends, it could destroy its unique queue reference and not to force a destroy all and reference to the queue in the main VI would still be a queue works valid waiting for an another sub - VI at the secondary level to generate his reference to the same queue and sends the data in.

• Instead of using the structure of the event with the producer consumer?

  I used the architecture of producer-consumer in the past to control a state machine with the structures of the event.  I'm working now with the basic version of LV that does not include the structure of the event.  Can anyone recommend alternatives to the use of the same architecture in this case?  Thank you, David

  Before the introduction of the structure of the event, the only option was the election.  Control terminals are in a time loop (the producer) with shift registers and a wait, usually about 100ms.  At each iteration of the loop, the control's current value is compared to the previous value.  If it has changed, and then take appropriate action.  Andrey suggested, queues are a good way to pass information between the loops.

  It works for the equivalent of the value change events.  Things like mouse to top or filter events were much more difficult or not possible.

  Lynn

• "Why the 2 screws are not same speed?

  HI comrades LabVIEW in love.

  Could someone let me know why the 2 screws attached do not run at the same speed I expect?

  Thanks in advance.

  Bryan

  Inside the event, value is only designed for the value of signalling events on the time-out, i.e. every 100 ms.

  Outside of the event is happening at the same time, so he writes to each iteration of the loop, and the timeout never occurs.

• Anyway to save the data in a loop without using shift register or feedback loop

  Hi all

  I've been thinking, is it possible to save data in a loop to the next iteration without the use of a shift register or a feedback loop?

  I need the possibility to reload the data within a loop from a file of lvm, but I want to use the same data until I have load some new.

  The reason why I don't want use the node registry or feedback shift is due to speed, although I don't know if the registry change

  in fact moves all the data of one register to another, or if it is stopped until a change data occur.

  I want to reuse data medium and large (6 measure of strength, pressure 2, 1 flow channels) of about 10 s data in each file with samplingsrate of 2 kHz...

  In my testing program, I have several CPU demanding computations and 3D graphics, so I want just to minimize the CPU loading as much as I can for each part of the

  software...

  I am enclosing a small VI to explain what I mean.

  I have now, I shouldn't use the express VI and I'll change that as well - it's just a proof of concept!

  Hope you guys can help me better understand this shift register...

  Thank you!

  -Tommy

  If the speed is the name of the game, go with the flow (data) and stick to a shift of registers or feedback node.  No data is moved, their job is to do pretty much exactly what you describe.  Any other solution, control/locals/globals will imply a copy of the data, and then you will have problems with speed.

• Using the producer/consumer with GPIB/VISA model

  Hi all

  So I have a .VI I learned to communicate with my camera, I joined. I tried strip down as much as possible, just to understand the concept. It basically just takes a resource VISA name, use this open VISA, then uses the same resource VISA to write a command that reads the data from my machine (xall?) and then bed in 500 bytes and which prints. If it works, and it's good.

  I try to use producer/consumer model for doing essentially exactly what this guy. I have a RLC, I want to press a button that starts my measure, I want him to taste several times per second, save the data in a text file or .csv and then stop when I press the stop button. Thus, he will be given indefinitely potentially.

  I would like to have the data in a format something like:

  Time C R

  0 5.0 4.3

  ... etc.

  I read the link of model p/c above, but my LabView knowledge is still low. Currently, my plan is to take the part of read/write of my attached VI, which are a sub - VI and then put that in the pink box in the VI for the producer/consumer above page that is labeled "produce data to be placed in the queue":

  

  What prevents me to do this, it's that I can't get the piece of read/write to work properly as a standalone Subvi.

  What is the right way to go about this?

  Thank you!

  I put if you actually found data of your instrument.  Your instrument is not made to take new measures or just send you the last reading, she did.

  Insofar as the file IO, I recommend that you learn to use the palette for the file IO functions.  You need to create your file before your loop, write in a text file inside and then close after the loop.  I don't do the thing the comment on the express VI entry will do what you want.

• We will search for answerswhen I download a mp4 file of say 10 MB, the download folder is no indication that say 6 Mo sometimes, why the full wire is not registered?

  When I download an of say 10 MB mp4 file, download file watch only say 6 Mo sometimes, why the full file is not registered?
  This problem occurs only in a few cases 5 percent if I d/l new and get the complete file

  Hi, Zjpz,

  What version of Internet Explorer you are using-

  Change in size/content of the file during the transfer is the typical result of the use of text transfer mode. With mode, the sequence of characters to delimit lines in the text file is changed. Under Windows, the sequence has two bytes, then to a single byte on Unix. Where the change in file size.

  http://WinSCP.NET/Eng/docs/faq_transfer_size_change

  Why changes in the size of file after the download of video/Audio

  I would like to develop the explanation using a type of FLV video file for example. For the above example image, the size of the original file was 9,88 MB and the video format is FLV - which is a Flash video. This type of video is super compressed to save bandwidth and streams of the fastest video on a computer. During the process of re-encoding, it is off compression first before it is re-encoded. Output size is dependent on the type of media file that you download, you will notice little change downloading format that uses less compression method.

  http://support.kajabi.com/entries/414037-why-does-the-file-size-changes-after-uploading-video-audio