Convert static Dispatch VI VI dynamic distribution

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• Summary of functions (two entries) for classes of brother with a dynamic distribution of entry: the static entry retains the type of the parent class.

  Suppose that in a hypothetical example, I have a superclass (number) with two children (real and complex) classes.

  I would define a function of sum for these classes, using dynamic distribution.

  Real or complex would have its own method of the sum (VI) which would be subject to various operations, such as the real and complex numbers are different.

  As I understand it, the normal way to proceed in OOP is for each of these methods to have an entry of dynamic distribution and a static entry of its own type.

  Problem: Labview doesn't let me do this!

  I first define an input method dynamic-shipping dummy for the numberof the parent class, but only the first entry can be dynamic-Envoy while the other is statically typed as number.

  Then, when I create override methods in my two children classes real and complex, the second entry (static) remains under the number (the type of the parent class). This is not fair, because then I can't access the private data of the child class of type real or complex that will be connected to the second input (static).

  What is the solution to this problem (usually)?

  I think that, in LVOOP, you use only a dynamic terminal or a static terminal to the terminal object.

  You can have several other terminals, but all the dynamics VI (methods with the same name) must have the same API (terminals).

  If you have to understand your preferred mode to pass, use multiple terminals, not used by each method, or use a cluster that contains all the numbers to pass (real or complex, both of which are not used in each method) or you can try a Variant, as shown.

• dynamic distribution and an order for various devices of construction

  I have a code that is written on a device. The device will be changed, but perform the same basic (frequency setting, power etc) commands. So, I wrote a dynamic dispatch VI that takes a command string predefined and written to the appropriate device based on what communication mechanism is used (SNMP, VISA, etc.). My question is related to the predefined command string that feeds this VI. I think that the creation of the chain of command VI should also be dynamic distribution and should build the command appropriate for the given device. But some devices might have several parameters required for the construction of this string (for example, snmp) and something like VISA may not be only one parameter. Dynamic distribution screw must have the same connector components, so what is the best way to handle this? I thought about having a class of 'settings' in the connector pane that holds all the specific parameters for a device. But it seems exaggerated to make a class for something like this, when a variant would do the trick as input. However, having a variant as it tends to make me think of distribution dynamic is not necessarily the right choice in the first place because you force a similar connector component.

  I also consider if some necessary inputs are, in fact, the State of the object and that it could be found in the object itself. This would reduce the connector pane entries and can mitigate some of these problems all together.

  Thoughts?

  for (imstuck) wrote:

  I also consider if some necessary inputs are, in fact, the State of the object and that it could be found in the object itself. This would reduce the connector pane entries and can mitigate some of these problems all together.

  That's what I'd do. Make settings of the object data, so when you then call the function to generate the dynamic distribution VI command string has all the right data available to it.

• Secondary asynchronous dynamic distribution

  Hello

  A little, I have a problem with the help of screws of class member in a secondary school.  Take a look at this project, I joined to the VI for an example of what I'm trying to do (in LV 2011).

  Basically, I want to decide based on a user selection what Viewer I'll run and throw in a secondary school.  The user can change this during the operation of the program.  I decided to do the various viewers all the members of a class so that I can add new viewers and don't forget that all are compatible.

  Here's the question.  If I want to use the function of VI run asynchronously, I can't do this with dynamic distribution terminals (limitation in LabVIEW).  So, I did a pitcher that incorporates a static distribution terminals.  I call this launcher using the function to run asynchronously, and then the Launcher I runs the specific instances through dynamic distribution.  It works, and I can verify that the screws run with screw open their facades when they are run.  But I can't seem to get a reference to this VI which is launched via the Launcher to put in my main VI high school.

  I have a workaround, you can see in the other method used to launch screws in the example.  Selects directly using the name of the class member.  The data is passed to the VI using the method of control value.

  As I said, I have a solution to the problem.  But I wonder if there is a better way to do it.  So, if anyone knows how I can launch a VI of asynchronously and place its façade in a school I would like to hear about it.  Thanks to LabVIEW gurus.

  BTW, how easy you can solve your problem is to create a temporary queue, pass it in to the call of the CGRA (with static VI passing it in the dynamic), then you have the dynamic VI post its own Ref to the queue.  The calling code will wait in the queue for the reference, and then destroy the queue.

• VISA dynamic distribution and net

  Hello

  I'm learning to use LVOOP. I like to have the abstraction layer HAL for my test for that program she works for various instruments.

  Most of the instruments are connected to the computer via GPIB, so I can use VISA. Therefore, I created a class of material abstraction called 'meter' with a VISA as its property. So I have a dynamic dispatch VI called write VISA. This can work if all the instruments of the child are provided with VISA.

  However, an instrument is connected via a USB port, and the instrument of the vendor driver is .net. So this one tool will not work with the dynamic dispatch because I can't use write VISA.

  What is the best way to handle this situation?

  Thank you

  Joseph

  Why you need to dynamic distribution allows to write the refnum? Somewhere in your code, you must select a specific instrument instance, perhaps using a box structure. At this point, you could also include the initialization code for the specific instrument. In the case of VISA, you could write the refnum, and in the case of .NET, you can call the constructor (that is, create the refnum inside the class, not going outside).

• Best way to check if the VI is dynamic distribution?

  I do a bit of scripting to VI, to create a class of children of a given parent and substituting the dynamic distribution selected screws to create a profile of a class library, I'm iterating over all the screws and check the connector pane to see if there are dynamic terminals. I don't know that there is a smarter method...

  

  If you have a reference to the class library, you might be able to use the "DynamicMemberVIs" property (there also a "StaticMemberVIs" property).  I have not tried to use it myself, so I can't guarantee that it will do what it takes.

  Chris M.

• Problem with the combination of LabVIEW (dynamic distribution) classes, statechart module and module FPGA

  LOCATION:

  -I am developing a software plugin based on plug-ins based on LabVIEW classes that are instantiated in running. Plugin real classes come from the plug in generic classes that define interfaces to the VI instantiation and can provide basic functionality. This means that many of the methods of the class are dynamic distribution and even methods of child classes can call the parent method.

  -Plugins top level (the ones directly accessible by the main VI) each have a run method that animates a plug-in specific state transitions.

  -Transitions of the plug-in data acquisition (DAQ class) class calls a method of the DAQ class that reads data from an FPGA card OR and transmits to another component via a queue.

  PROBLEM:

  -Higher sampling rate, a FPGA-to-host FIFO overflow occurs after some time. When I "weigh" the system just by moving a window of Firefox browser on the screen, the overflow is triggered immediately. I did not have this kind of problem in older software, where I was also reading a FIFO of FPGA, but made no use of LabVIEW classes or diagrams.

  SOLUTIONS I'VE TRIED (WITHOUT SUCCESS):

  -J' put the transitions in a timed (instead of a simple while loop) loop that I assigned specifically to an own kernel (I have a quad-core processor), while I left all the other loops of my app (there many of them) in any simple loops. FIFO overflow still occurs, however.

  QUESTION:

  -Does anyone have a tip how I could fix this problem? What could be the cause: dynamic distribution methods, the acquisition of data of state transitions or just the fact that I have a large number of loops? However, I cannot change the fact that I have dynamic distribution methods because it is the essence of my architecture...

  Tips are greatly appreciated!

  I've now changed the execution priority of all the screws involved in reading of the FPGA FIFO '(highest) priority critical time '. This seems to be improving the situation much: so far I have not a FIFO overflow, even when I move around the windows on the screen. I hope it stays like that...

• LV 2009 bug - dynamic distribution selection dialog does not have the VI forward, if it is already open

  In 2009 of LV, if you double-click an implementation in the dynamic distribution selection dialog and VI is already open, it will not be credited toward the front. It worked correctly in earlier versions.

  Have a look at the attached draft for an example.

  Please try to drop the VI attached on top of program NIUninstaller Instruments\LabVIEW XXXX\resource\Framework\Providers\LVClassLibrary\ChooseImplementation\CLSUIP_OpenImplementations.vi and let me know if it works for you.

• Combining LVOOP DVR with dynamic distribution class and asynchronous Runtime Preserve

  OK, the title seems like a cornucopia of terms LVOOP.  But there's a reason.  It is sort of an extension of THIS thread.

  Do I have recently created a LVOOP approach to load completely asynchronous user interface elements into sub-panels.  This I have combined with a global repository for objects (which are essentially the singletons with functionality of the user interface) which are shared via DVR, thus eliminating a large number of synchronization headaches).

  This means that I can have a universal framework to initiate a secondary user interface elements.  Changes made to the object there are automatically reflected in the global repository.

  So far so good.

  What I do like is a combination of two buildings of apparently clumsy code that I need to keep things running.

  Construct odd 1:

  I defined a function "Launch UI" in my parent class which is the dynamic distribution (which allows to take care to launch its own UI of each object).  It takes a parent DVR as second entry object which sure is the exact type and the type of object called using the code below.  The Type REAL to two entries for the launch of VI in PEI are identical.  This is guaranteed because I need every new class instead of this function.

  

  Here I pass the DVR from outside to 'Launch' VI International preliminary examination, but the object obtained within the IPE retains information for DD thereby ensuring that the VI called for the launch of the user interface is identical to the type of object in the DVR REAL.  It works well and putting this bizarre construction within the parent class, abuse is minimized, it works very well and seems to have no major side effects.

  So now we have a VI running asynchronously in the background that belongs to a specific object, but has a DVR which it * thinks * is a parent Type, but because of the measures taken previously, is actually of the same type as the object itself.

  In order to make use of the functionality defined in this kind of real object, I continually have to re - interpret the object within the IPE as described below.  Otherwise only the Parent feature is available.

  

  If I access only methods of the parent class, then the Preserve feature is not necessary.

  Is there a more elegant way to do it?  I find the net result of this code and cast to be really useful and much easier to manage the road non - DVR since synchronization problems disappear.  Through the use of the near-atomic REI, we remove the chances of blocking.

  All editing in the asynchronous interface user of VI is automatically reflected in all subsequent use of the DVR.  Even if digital recorders are not shared between the screws, this makes it easier (for me) the puzzle of the synchronization.  If you start this expansion beyond the limits of a single VI, the benefits in synchronization becomes really huge.  You can even have several interface user objects based on the same data in the background without additional synchronization needs.  Required only one synchronization is a global 'data updates' for the object in question, in which case the UI elements simply update their indicators and the DVR's controls again.  It is trivial.

  So, I am convinced that the net result of this is very beneficial.

  My question is if there is a better, safer, or more 'official' way to do?

  I was about to start a new idea to combine the 'Preserve Run time class' and Terminal DVR of the International preliminary examination so that the casting is done automatically.  We could then have a double entry in PEI, the DVR (of the base type) as well as the ACTUAL Type of the object, but of course to return an error if the types are incompatible.  It would be like an "imposter" DVR of entry for International preliminary examination which allows a re-interpretation of the object type.

  Would all of this go away if we allowed dynamic distribution work with DVRs?  No doubt.

  Shane

  I agree that the deletion of bizarre construction #1 probably requires a dynamic send on DVR.  Unfortunately, if you look at the post of the exchange of ideas on that, there are a few nasty subtleties concerned by the application, so I wasn't expecting any time soon.

  For bizarre construction #2, you can cast the DVR itself.  Make a constant DVR that refers to the class of the child and lowered it seized goes in PEI.  If you need to return the parent type after the International preliminary examination, branch just the wire DVR before melting and use it as your lead.

• Very weird behavior of LV OOP/classes: wrong dynamic distribution method is called

  I have very strange problem: a Subvi (start_scanning.vi) in my software is supposed to call a method on dynamic distribution (send_trigger.vi) of a class of LV:

  

  However, instead of calling the send_trigger.vi, a completely different method (with a different name and a component of connector without matching) of a class parent is called. LabVIEW then immediately displays a dialog box indicating "LabVIEW: an input parameter is not valid." For example if the input is a path, the path can contain a character not allowed by the operating system such as? or @. The first level VI "main.vi" was arrested in stranger on the block diagram of the 'GenericPlugin.lvclass:set_current_objective.vi '.

  GenericPlugin.lvclass:set_current_objective.vi (mentioned in the message of the dialog box) is the method that is called instead of the correct method. The input parameter invalid, that the message of the dialog box refers to is probably the enum that I pass to my method of distribution dynamic (this enum of course does not match the input parameter expected by set_current_objective.vi).

  I tried to give LabVIEW an additional clue he's trying to call the wrong way by putting another input to the façade of the set_current_objective.vi control (and plug it into the connector pane). Indeed, this change something: LabVIEW then completely stalls (does not respond to ANY user input more), but the correct method (send_trigger.vi) is not executed (sensors inside the method do not run). What is the case if, rather than add additional control on the front of the set_current_objective.vi Panel, I try to pass another enum value to send_trigger.vi.

  A strange observation is that at some point the VI (e.g., start_scanning.vi) somehow try to call the method of dynamic distribution gets locked (the façade seems that ran the VI; and the block schema cannot be modified more).

  I would be grateful any indication which could help me to solve this problem, because I am really stuck now...

  All of the code-compilation of mass seems to have solved the problem.

• VPN tunnel for initiation of the static method to the dynamic side

  Hello

  In the case of site to site VPN between static IP (ASA) and dynamic IP (Linksys AG241), would it be possible to open the VPN tunnel by the static side? How can I configure it? Could you please advice?

  Thank you very much

  Nitass

  Nitass, I'm sure that you can not start session with ASA, which is on the side of the VPN server.

• Best practices - dynamic distribution of VI with LV2011

  I'm the code distribution which consists of a main program that calls existing (and future) vi dynamically, but one at a time. Dynamics called vi have no input or output terminals. They run one at a time, in a subgroup of experts in the main program. The main program must maintain a reference to the vi loaded dynamically, so it can be sure that the dyn. responsible VI has stopped completely before unloading the call a replacement vi. These vi do not use shared or global variables, but may have a few vi together with the main program (it would be OK to duplicate these in the version of vi).

  In this context, what are best practices these days to release dynamically load of vi (and their dependants)?

  If I use a library of project (.lvlib), it seems that I have to first build an .exe that contains the top-level VI (that dynamically load), so that a separate .lvlib can be generated which includes their dependencies. The content of this .lvlib and a .lvlib containing the top-level VI can be merged to create a single .lvlib, and then a packed library can be generated for distribution with the main .exe.

  This seems much too involved (but necessary)?

  My goal is to have a .exe for the main program and another structure containing the VI called dynamically and their dependents. It seemed so straighforward when an .exe was really a .llb a few years ago

  Thanks in advance for your comments.

  Continue the conversation with me here is the solution:

  

  Runs like a champ. All dependencies are contained in the packed library and the dynamic call works fine.

• PIX 501, 1 static IP, IP address dynamic 2. Mesh full possible?

  I have 3 sites. All sites have PIX 501. Central site has a static IP, 2 remote sites a dynamic IP.

  I have no problem with the connection to the central site by using their dynamic IP address in a remote star connection.

  Is it possible for 2 remote sites communicate? There is data that must be transferred between remote sites. I read somewhere in cisco site web which its possible via mesh on request.

  Does anyone have an example of configuration on a VPN Site to Site where the Central site has static IP and remote sites with a dynamic IP? Remote locations teaches a dynamic IP from remote sites to the central server.

  Thank you.

  With IOS as your hub and then the Yes rays, the rays can learn dynamically address other departments using the PNDH. This type of configuration is called Dynamic Multipoint VPN (DMVPN), you can read everything you need to know about this here:

  http://www.Cisco.com/warp/public/105/DMVPN.html

  Even with EzVPN (not DMVPN) the rays will not learn the address of other rays, all communication is always via the hub. Call another talks would work, but as I said, the packages will talk-star.

• Impossible to partition the disk, download aq message "the operation u selected will convert the basic disk to dynamic.

  Original title: Partition Undone... !!

  Hey Guyz, I use Windows 7 basic, I have 4 drives on my pc... C Drive(Boot drive) & D Drive (HP Recovery Drive), CD & DVD ROM The C drive is full apprx 480 GB space and I want partition. I followed the procedure mentioned in the tutorials... I have partitioned my drive C for 18 GB just for the trial to see how the partition... After completing all stages of processing of a message box appears saying "the operation u selected will convert the basic dynamic disk. If you convert you bot b able to start installed operating system of any volume on the disk (except the boot volume). do you want to continue 2 '... If answered NO then your space partioned is stuck like disk space unallocated in Disk Management window. If SO a pop up comes to say "dynamic disk are not supported by this server confg or the operating system. Dynamic disk are not supported on clusters.        Please let me know what the problem... How to recover my unallocated space or how can I partion my disk. PArtio

  You have FOUR partitions on the hard drive.

  There is a system partition that is hidden on the front of the main road.

  The problem with adding a partition, except for what you have already experienced, is that the use of the partition or recovery from recovery discs from the recovery partition would WIPE OUT any partition created by you, and all THE data on that partition.

  If you are looking for a place to keep backups, get an external hard drive.

  OEM machines are not set up for change. They are set up to make it easy for the user to restore the operating system in its entirety, drivers and support programs, in the case of a major accident.

• Difference between the static SQL query and dynamic SQL query.

  Hello
  
  Please explain the fundamental difference between static and dynamic sql queries. Please explain for example.

  Static: http://download.oracle.com/docs/cd/E11882_01/appdev.112/e10472/static.htm
  Dynamics: http://download.oracle.com/docs/cd/E11882_01/appdev.112/e10472/dynamic.htm