Dynamic events in PD/OM infotypes.

Hi, I want to know if it's possible to implement dynamic events in OM/PD info like PA info (tableT588Z). If not, other solutions?
Thanks for answers.

I don't think so there is any concept of dynamic events in OM.... it's not required....and also not possible i guess....!!!!

Similar Messages

What are the Dynamic Events avaliable in the LabView 6.1 Event Structure?

I recieved LabView 6.1 recently and I am working with the Event Structure, and I'm trying to figure out what Dynamic Events are avaliable in the event structure, and how to access them. If you don't understand what I'm talking about, open a new VI in LabView 6.1 and drop an event structure on the diagram. Add an event and look at the dialog box that appears on the screen, specifically the Event Sources section. The third option in this area of the screen is "grayed out" but reads "Dynamic". I'm curious what these events are, and how I access them. I'm running WinNT 4 SP6.
Thanks,
Chris Davis

I believe this is part of a feature which is not yet present in LabVIEW 6.1, but may be present in a future release.

Resetting a variable in an event structure (dynamic event)

I'm working on moving an event structure into a sub VI. This means I have to register dynamic events.
The event structure is handling some button clicks. The state of the button (mechanical action = latch when released) resets itself automatically as long as the variable is placed within the value change case. Leaving the button in this case is not possible when the event structure is put in a sub VI and the variable is located in the parent VI. How do I make sure the button unlatches after clicking on it? I have attached an example where all the code is in one VI (the local variable must be moved outside the event structure in order for it to be moved into a sub VI). Any ideas?
If you open the VI and run it, you can click Start which will cause the counter to start incrementing. The button only unlatches as long as the variable is located in the value change case.
(Btw, how do you put images inline in a post?)
Rob
LV2011,LV2012,LV2013
Attachments:
img.png ‏18 KB
main.vi ‏17 KB

Race conditions are the primary reason not to do that. But since your treating your variable as a latch, I doubt your using the value you read from it anywhere, and in that case it can't create a race condition. There's also the possibility that the control's reference could become invalid. But since this is a sub VI of the control's VI that can't happen (even if it could you can check the error out of the value property node to see when it happens and deal with it).
I'm not sure about the flickering, Since I can't seem to duplicate it with a simple test case on my machine. It might related to whatever else you're doing in the event apart from reseting the value to false.

2012 Dynamic Event Registration Array of Controls

In upgrading to LV2012, I have discoverd what may be a bug, or at least an incompatability between 2011 and 2012 with respect dynamic event registration of an array of controls as opposed to individual control references.
This bit of code worked in 2011 but doesn't in 2012, with error 1 generated at the reg events block when run in 2012. I have been in contact with technical support, but haven't yet heard their take on this.
Any thoughts.
Solved!
Go to Solution.
Attachments:
Top Application.png ‏13 KB
SubVI.png ‏23 KB

I've got the bug too -- it appears this bug is present when arrays of control refs are connected to the ConPane. Link to cross-post on LAVA about the original problem. As Patrick@Vision mentions above, one workaround is to ensure that the array of control refs is no longer on the ConPane by collapsing the Register for Events node onto the caller.
a.lia-user-name-link[href="/t5/user/viewprofilepage/user-id/88938"] {color: black;} a.lia-user-name-link[href="/t5/user/viewprofilepage/user-id/88938"]:after {content: '';} .jrd-sig {height: 80px; overflow: visible;} .jrd-sig-deploy {float:left; opacity:0.2;} .jrd-sig-img {float:right; opacity:0.2;} .jrd-sig-img:hover {opacity:0.8;} .jrd-sig-deploy:hover {opacity:0.8;}

Dynamic event with global variable (vi)

I have registered a dynamic event to fire when a control in a global vi value changes. All works fine when I open the global vi and change the value of the control manually. When I have another vi modify the value of the global, the dynamic event does not fire.
I have tried leaving the front panel of the global vi open and observed the value being changed...
Any help appreciated...

Hi,
Please refer to the following document that explains why programmatic changes to the global doesn't get detected.
Event Structure Does Not Capture the Value Changed Event...
I hope this helps.
Sincerely,
Feroz
National Instruments

Are you ever required to wire the dynamic event terminals through an event case?

I remember some time ago, I ran into an issue while using an event case where my program was not functioning properly until, on a whim, I wired the dynamic event through that event case... now the reason I'm asking this in a general sense is because I don't remember what particular code I had this issue with and I could have been failing to update a shift register or something.
In code I'm currently writing, I'm simply passing the dynamic event wire in a shift reg. I was just wondering if there's any difference between wiring it through the event cases or simply passing it to the output shift register (without passing through the event cases)...
any info appreciated!
Thx
-pat

You do not have to wire it through. You don't need a shift register for references since the value will be the same for each iteration. In fact using a shift register is probably what caused issues. You probably updated it with the default value somewhere.
=====================
LabVIEW 2012

Peculiar problem in dynamic event, which is registering randomly

Hello,
I am using a dynamic event to pass a data (variant) to a vi which i call dynamically. reference of the event is stored in LV2G.
so both main and called vi can access. data when written to the generate user event vi is triggering event at random time when executed.
I am attaching snapshot of the vi which i used to register event.
One interesting thing i noticed is if i put a probe in the error out of the generate user event vi then event will start triggering.
Need help. I am struggling to get a solution.
Regards,
Vibin
Attachments:
Capture.PNG ‏21 KB

Post any code you have on the issue. There may be something simple that will fix the problem. It sounds a lot like a race condition.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines

Tag engine dynamic events

Does anyone have an example using dynamic events with tag values from the DSC engine?? I use 7.0 format.

hi there
you can combine DataSocket Read - function with timeout and a registered user event (see attachment)
Best regards
chris
CL(A)Dly bending G-Force with LabVIEW
famous last words: "oh my god, it is full of stars!"
Attachments:
Wait for Tag to change ist value_7.1.vi ‏74 KB

Using a dynamic event to trigger a signal

Hi,
I'm using a state machines approach to control a motor. I would like to trigger the current (for exemple, when current> 10 A, the event Overload happens). I think it is possible by using a dynamic event but I don't know how to do it.
Does somebody know how to do that?
Thank you

I peeked into my tag cloud- I suspected that one of my "BENex.." tags linked to an example from Ben Raynard on this topic.
Ben posted this example and This link to a Nugget by Ton on dynamic events.
Jeff

Dynamic Event Registration Error

Hi,
I'm getting to grips with Dynamic events in LabVIEW. However, I've encountered an issue i'm not sure on. When I try to register a cluster of control refs to the Register for Events function I get an error.. See Dynamic Event Registration.vi for small vi highlighting the issue.
Thoughts?
Strokes
Attachments:
Dyanmic Event Registration Error.vi ‏9 KB

Steve Chandler wrote:
You can wire a reference or an array of references to register for events. Of course you probably already know that you have to wire the output of register for events to the dynamic registration terminal of the event structure.
Steve Chandler wrote:
You can wire a reference or an array of references to register for events. Of course you probably already know that you have to wire the output of register for events to the dynamic registration terminal of the event structure.
That helped me somewhat, however, I'm still experiencing problems. My events seem to be registering correctly but don't seem to generate when I trigger them. I've configured the event structure to execute should one of the controls in my cluster change value. However, the only event case that get's executed is the timeout case.
I've attached a vi highlighting my problem named Dynamic Event Problem.vi. My real vi is much larger and contains many sub vis so hopefully what I've attached suffices..
Attachments:
Process Data Control Refs Edit.ctl ‏14 KB
Dynamic Event Problem.vi ‏22 KB

Using Dynamic Events in PC based RT Target

Hi!
I have a PC based Real-Time Target. I try use dynamic call of VI on RT target with setting reference to user event. My code for Host:
My code for RT Target:
But when VI has started, on user event no action ocсur. How can I use dynamic events on RT Target?
Attachments:
Host.png ‏35 KB
RT_Target.png ‏51 KB

Silentium wrote:
Also i try use Queue in same manner - set reference to queue, but it's not workin too. So i can use only shared variable or TCP/UDP to transfer data between Host and RT target?
You can alos use VI-Server Invoke node Call by reference.
"back in the day..." when LabVIEW Real-Time was new and fresh, Serving an Action Engine on the RT platform allowed all of the threads on the RT target to read and write as they needed while also allowing the access to methods to reading/writting from the PC.
So there are other ways as well (serial, ScramNet....)
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

Triggering Dynamic actions when updating an Infotype using a FM

Hi all,
This is the scenario.
I am trying to run a Transfer action, (80), which updates the Infotype 0000 and Infotype 0001. When the entry in the Infotype 0001 is saved, a dynamic action is triggered and a custom infotype is updated automatically. I need to find a FM that takes care of any dynamic actins associated to an Infotype.
I tried using a BDC, but I was not successful. While using the FM HR_INFOTYPE_OPERATION, I am able to update the data into the infotyes 0000 and 0001 but the dnamic action is not triggered. Can someone please suggest a solution.
Thanks,
Amar

Hi,
   Thanks for you r reply. Well I am new to dynamic actions, but this is the Dynamic action that has been written.
GET_DU(ZHRDUDYNCALL)
COP,9009,,,(P0001-BEGDA),(P0001-ENDDA)/D
----P9009-SEQNR=P0001-SEQNR ---***
P9009-AEDTM=P0001-AEDTM
P9009-UNAME=P0001-UNAME
P9009-DU_CD=RP50D-FIELD1
--END OF ENTRY IN TABLE PA9009--
--CREATE ENTRY IN TABLE PA9009----
SY-DATUM=SY-DATUM
GET_DU(ZHRDUDYNCALL)
DEL,9009,,,(P0001-BEGDA),(P0001-ENDDA)/D
P9009-DU_CD=RP50D-FIELD1
--END OF ENTRY IN TABLE PA9009--
The FM that I am using goes like this:
CALL FUNCTION 'HR_INFOTYPE_OPERATION'
EXPORTING
    infty                  = '0001'
    number                 = lv_pernr
SUBTYPE                =   wa_0000-MASSN
OBJECTID               =
LOCKINDICATOR          =
   VALIDITYEND            = lc_endda
   VALIDITYBEGIN          = wa_source_data-begda
RECORDNUMBER           = 1
    record                 = wa_0001
    operation              = 'COP'
   TCLAS                  = 'A'
   DIALOG_MODE            = '0'
NOCOMMIT               =
VIEW_IDENTIFIER        =
   SECONDARY_RECORD       = proposed_values0001
IMPORTING
RETURN                 = return
KEY                    =
Please let me know if there is anything more I need to do?
Thanks,
Amar

Dynamic Events Problem

I am fairly new to LabVIEW and I am trying to make a GUI that uses
events to pass messages between three separate event loops, GUI,
Messaging and Logging. GUI controls the state of the other two event
loops by generating control events and using semaphores. While the
messaging semaphore is released by the GUI, Messaging generates
messages and raises them as events. Some message events are handled by
the GUI event loop and others by the Logging event loop. Logging, once
it receives a 'logging ON' control event dynamically registers for
certain message events and logs the message events it handles to file.
When Logging receives a 'logging OFF' control event, it dynamically
unregisters the message events. The logging control events are
registered for the life of the Logging event loop.
I have created a cut-down version of my GUI that exhibits the same
problem. The problem is that after I have turned Logging on and off
once, it no longer responds to logging control events from the GUI.
Even though the GUI is still generating the events. I have looked at
the dynamic logging example in LabVIEW and thought I did the same sort
of thing but I just can't get it to work that way. The only way I got
it working was by creating a clean event registration with all events
each time I want to change the event registration. This is how I have
done it in the example file and it works. But I don't want to use this
method, I don't want to have to re-register the control events each
time I unregister/register message events.
If anyone knows what I'm doing wrong please edit the example vis and post them back.
Notes for the example:
Files are LabVIEW 7.1.1
Just open the front panels for all the vis before running the GUI vi.
The Display vi just does the same thing as the logging vi.
Run the GUI vi and turn on Messaging then turn Logging on and off a few times.
The example works, but if you wire the event registration refnum
input when doing dynamic event registration, Logging will only turn on
and off once, then no longer respond to log control events... what's
going on?

I can't tell you how to solve you problems - without code this is always quite tricky.
But in case you want to log messages to a log file, have a look at this thread
http://forums.ni.com/ni/board/message?board.id=170&message.id=172117&view=by_date_ascending&page=1
where I posted a logging-library.
Maybe it is a useful help for you.
Thomas
Using LV8.0
Don't be afraid to rate a good answer...

1043 error when trying to use dynamic events on RT system

Hello,
I am trying to define some dynamic events as specified it the LabView help for RT targets. But when trying to run the vi I get the 1043 error. What am I doing wrong?
Thank you,
Przemek
Attachments:
RT test.vi ‏17 KB

Dear Przemek,
to fully understand you problem and to be able to help you, I will have to ask you a few questions:
What version of LabVIEW are you using?
What RT target are you using?
What specific help file are you referring to?
Are you creating an executable? If yes, this document could be helpful:
http://digital.ni.com/public.nsf/allkb/1E180530E05E4DB28625731C006CCB5A?OpenDocument
Regards,
Mateusz Stokłosa
Applications Engineer
National Instruments

Generate dynamic event of producer loop in multiple consumer loop

I have one producer loop which used event case to interface with FP controls and 5 consumer loops
If I have to use the fifth consumer loop to generate dynamic event which send to event case in produer loop.
I have to wire register event with dynamic event terminal in producer loop . Also I need to wire user event to consumer loop (at the bottom of screen window) which is far away from producer loop. It is hard to wire them.
Is there any other method to let many consumer loop to communicate with one producer loop through dynamic event (the same user event)?

I like to use an Action Engine to hold control my Event Reference. Then anybody can send the event commands.
You may also want to look at the VIs I recently submitted for OpenG here.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines

Dynamic events in PD/OM infotypes.

Similar Messages

Maybe you are looking for