The instantiation of the indicators of labview or sub - VI?

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• When I change the setting by LabVIEW on my device, I see change on the monitor of the device?

  When I change the setting by LabVIEW on my device, I see change on the monitor of the device?

  This question should be addressed to the manufacturer of the device. From your previous posts, I guess you use GPIB or serial. If the unit has received the order, the manufacturer should be able to tell if no indicators on the device to update when the order is received. Based on my experience, however, the device indicators will most likely update on receipt of an order successfully.

• Update of the indicators of the façade is trolling in the test of the functions in the provider DLL

  I'm looking to see if someone can explain a behavior to display weird LabVIEW I see when to test some timeout works in a third party DLL. I have a work around in place but I would still like to know why, without the workaround, the information displayed by the indicators on the front panel are not synchronized with what is happening in the execution of the VI, even though I tried all sorts of things to impose the synchronization. Note that to run the VI in a useful way, you need to be able to communicate with a Galil axes via an Ethernet controller, and which, for the most part, limited this discussion to what the experts among you know happen under the hood of LabVIEW in situations like this.

  This is what looks like the VI when my work around (false wait added) is active. It's a small state machine that uses the elements of the array "Test Sequence" to tell him what to do in each step of its implementation. Here he plays a first time-out value, sets a new value of timeout, reading again, the timeout by asking a READING of the controller (without having first asked to say anything), followed by restoring the initial time-out and then tests to stop.  The two indicators in the red rectangle are there to show the current status of the execution, and it is this pair of indicators which are not synchronized with the State of the actual program.

  

  When execution completes, it is what we see.

  

  If the false timeout is too short, then the indicators are not synchronized with the State of the program, or in this case, with the other.  Note that the only time wherever the VI display is static enough for me to take a screenshot as it is during the period of "Test Timeout. When the time-out occurs Finally, things be synchronized and the same results are displayed.

  

  Here's the code.  I am also attaching a folder zipped with the code, just because I don't know if the extracts are smart enough to include all the dll referenced by library call nodes.

  

  Here on the left of the loop indicator 'State' and 'Index' terminals can be seen. The 'fake Wait' needed to make the indicators work synchronously appears below in the same area. Before coming with this 'fix' things I've tried, what has not worked, were:

  • addition of the structure of flat sequence seen here with the indicators in the first panel
  • Entrance to the 'value' property nodes using linked to two indicators with their outputs error Garland at the entrance of the error on the function 'G Read' (test timeout).
  • defining indicators for "synchronous display" (apparently this parameter actually only works with the multi-threaded code, which I don't believe it is)
  • setting false property to "postpone updates on the front panel.

  Another thing that worked linked a "probe" to any data path entrance side of the conditional structure. I thought that it causes also a few milliseconds of delay as the expectation.

  My best guess at what happens is that display updates are "launch and forget" actions that occur on parallel execution paths in the single execution thread and function on obtaining some of the main process to complete time slices. But when the main process is the name of an external library, which, outside the library can't share time with all other processes that can run in the same thread.  All this makes sense?

  This is because all these CFLN calls to the dll are set to run in the UI thread (to view the color orange on the top of the node).

  If they eat the cycles in the UI thread, they may not leave enough cycles to LabVIEW to make updates to the user interface of the front panel.

  What make these 3 part of the dll?  They need to run in the UI thread?  Is there a problem with the standby so that the DLLs are not pounding the UI thread?

• Read the indicators continually the Subvi execution

  Greetings,

  Number of previous threads about this problem. However, it looks like all the need of huge changes to to the Subvi.

  Now, we have a bunch of Subvi programmed by different programmers, but at the end it is difficult if we combine all the indicators in each Subvi and display the values in the façade of a single main vi, without big changes for each Subvi.

  Control reference using will be a solution, with some changes in the sous-de VI, but it seems that the main vi and Subvi need to run at the same time. We cannot run only a Subvi himself then.

  Variable overall is another station, however, we have a huge amount of indicators, creating global variables for each indicator in each Subvi seems like redundant procedures.

  '

  I wonder if there is a way to create a main vi shell-like read these indicators permanently without needing to touch the inside of each individual Subvi. Or please let know us if you have better ideas.

  Thanks in advanced for any comment.

  -chen

  I was not involved in all this other discussions that you mention, so I can only go off of what you have described in your post. So the questions I ask are:

  -Don't the SubVIs run continuously (called) before the end of the application?

  -How to stop the sub live? You are reliant on the controls on the front panel (for example, a stop button)?

  If you'd rather not touch the sub live, you could put the sub sub-panels in the main vi screws. This would allow you to expose their facades, hosted in the main vi. Search for Sub panels using LabVIEW or online. It would also expost controls too, but you can customize the front of each to hide these off-screen, so to speak. There is also a VI properties that allow you to programmtically re - locate originally and resize the front panels in order to ensure the proper display.

  If this does not work for you then I think you should take a hard look at your architecture. Sometimes you can get so far from Shoemaker to things together. Look closer at all misconceptions of what a VI is actually and what calling a VI in an another VI means in fact (you're basically calling a function with some extras added as a front panel). There are ways to get what you want by programming, but they are hard work, not very easy to manage and can be more effort than other solutions.

  My strategy of choice? Use a messaging system any to communicate between your objects in your system. You have your items (hand UI, each Sub VI is a small entity of independent work of others) and you can use one of the buildings available to you through LabVIEW base (notifiers, queues, events user Global Variables (yuck), FGVs etc.) to allow these objects communicate with each other.

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  The light is yellow, the others do not work. The laptop turns on, runs on battery, everything, but the indicators do not work. What can be the problem?

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  Welcome them

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  fake
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  MicrosoftInternetExplorer4

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  fake
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