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

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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
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Mateusz Stokłosa
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That works – thank you!
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var myTweenInX:Tween;
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at fl.transitions::Tween/set time()
at fl.transitions::Tween/nextFrame()
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LIMITATIONS
•     How Can I Hide UPDATE button while I press NEW button. ??
•     How Can I Hide CREATE button while I’m UPDATING A RECORD. ??
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NEW          Redirects to URL: javascript:$x_Value(‘P150_ACTION’,’NEW’);
SAVE          Redirects to URL: javascript:$x_Value(‘P150_ACTION’,’UPDATE’);
CREATE          Redirects to URL: javascript:$x_Value(‘P150_ACTION’,’CREATE’);
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Name:     Select Dept
Event:     Change
Selection Type:     Item(s)
Item(s):     P1_ACTION
Condition:     equal to
Value:     SELECT
Action:     Execute PL/SQL Code
PL/SQL Code:
SELECT dname, loc
INTO :P1_DNAME, :P1_LOC
FROM dept
WHERE deptno = :P1_DEPTNO;
Page Items to Submit:     P1_DEPTNO, P1_DNAME, P1_LOC
Don’t include any false action and create the Dynamic Action.
The first limitation, the value of page elements don’t do refresh so I added the following true actions to the dynamic action AFTER Execute PL/SQL Code.
Action:     Set Value
Unmark *‘Fire on page load’* and *‘Stop execution on error’*
Set Type:     PL/SQL Expression
PL/SQL Expression:     :P1_DNAME
Page Items to submit:     (none) (leave it blank)
Affected Elements: Item P1_DNAME
Action:     Set Value
Unmark *‘Fire on page load’* and *‘Stop execution on error’*
Set Type:     PL/SQL Expression
PL/SQL Expression:     :P1_LOC
Page Items to submit:     (none) (leave it blank)
Affected Elements: Item P1_LOC
These actions allow refresh the items display value.
9)     Create the following Dynamic Action to Update a Department
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Selection Type:     Item(s)
Item(s):     P1_ACTION
Condition:     equal to
Value:     CREATE
Action:     Execute PL/SQL Code
PL/SQL Code:
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dname = :P1_DNAME,
loc = :P1_LOC
WHERE deptno = :P1_DEPTNO;
Page Items to Submit:     P1_DEPTNO, P1_DNAME, P1_LOC
Don’t include any false action and create the Dynamic Action.
Include the following True Actions BEFORE the Execute PL/SQL Code true Action.
Action:     Set Value
Unmark ‘Fire on page load’ and ‘Stop execution on error’
Set Type:     PL/SQL Expression
PL/SQL Expression:     :P1_DNAME
Page Items to submit:     P1_DNAME
Affected Elements: Item P1_DNAME
Action:     Set Value
Unmark *‘Fire on page load’* and *‘Stop execution on error’*
Set Type:     PL/SQL Expression
PL/SQL Expression:     :P1_LOC
Page Items to submit:     P1_LOC
Affected Elements: Item P1_LOC
These actions allow refresh the items display value.
Finally to refresh the Departments report, add the following true action at the end
Action:     Refresh
Affected Elements: Region Departments
10)     Create the following Dynamic Action to Create a Department
Name:     Create Dept
Event:     Change
Selection Type:     Item(s)
Item(s):     P1_ACTION
Condition:     equal to
Value:     CREATE
Action:     Execute PL/SQL Code
PL/SQL Code:
INSERT INTO dept(deptno,dname,loc)
VALUES (:P1_DEPTNO,:P1_DNAME,:P1_LOC);
Page Items to Submit:     P1_DEPTNO, P1_DNAME, P1_LOC
Don’t include any false action and create the Dynamic Action.
Include the following True Actions BEFORE the Execute PL/SQL Code true Action.
Action:     Set Value
Unmark *‘Fire on page load’* and *‘Stop execution on error’*
Set Type:     PL/SQL Function Body
PL/SQL Function Body:
DECLARE
v_pk NUMBER;
BEGIN
SELECT DEPT_SEQ.nextval INTO v_pk FROM DUAL;; -- or any other existing sequence
RETURN v_pk;
END;
Page Items to submit:     P1_DEPTNO
Affected Elements: Item P1_DEPTNO
Action:     Set Value
Unmark *‘Fire on page load’* and *‘Stop execution on error’*
Set Type:     PL/SQL Expression
PL/SQL Expression:     :P1_DNAME
Page Items to submit:     P1_DNAME
Affected Elements: Item P1_DNAME
Action:     Set Value
Unmark ‘Fire on page load’ and ‘Stop execution on error’
Set Type:     PL/SQL Expression
PL/SQL Expression:     :P1_LOC
Page Items to submit:     P1_LOC
Affected Elements: Item P1_LOC
These actions allow refresh the items display value.
Finally to refresh the Departments report, add the following true action at the end
Action:     Refresh
Affected Elements: Region Departments
11)     Create the following Dynamic Action to delete a department
Name:     Delete Dept
Event:     Change
Selection Type:     Item(s)
Item(s):     P1_ACTION
Condition:     equal to
Value:     DELETE
Action:     Execute PL/SQL Code
PL/SQL Code:
DELETE dept
WHERE deptno = :P1_DEPTNO;
Page Items to Submit:     P1_DEPTNO
Don’t include any false action and create the Dynamic Action.
Include the following True Actions AFTER the Execute PL/SQL Code true Action.
Action:     Refresh
Affected Elements: Region Departments
Action:     Clear
Unmark ‘Fire on page load’
Affected Elements: Items P1_DEPTNO, P1_DNAME, P1_LOC
12)     Finally Create the following Dynamic Action for the NEW event
Name:     New Dept
Event:     Change
Selection Type:     Item(s)
Item(s):     P1_ACTION
Condition:     equal to
Value:     NEW
Action:     Clear
Unmark *‘Fire on page load’*
Affected Elements: Items P1_DEPTNO, P1_DNAME, P1_LOC

I need some help to solve this issues
•     How Can I Hide UPDATE button while I press NEW button. ??
•     How Can I Hide CREATE button while I’m UPDATING A RECORD. ??
•     How can I avoid multiple Inserts or Updates. ??

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Seidl Michael | http://www.techguy.at |
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Having trouble with if else when used with event.value... please help

Please can someone shed any light on where i'm going wrong.
I have a pdf form that uses a drop down menu for the SubBrand and a series of checkboxes for the Location.
the following code is placed as a custom calculation script in an address text field and what im after is dynamically setting the address based on the subbrand and location.
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Thanks for the tip GIlad I've amended my code but am still experiencing the issue, im at a loss as to what is preventing the address field from changing when the subbrand changes.
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Updated Code:
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RT Targets only support dynamic events as seen in this demo:
http://digital.ni.com/public.nsf/allkb/42B70D2D0C4B568586256E2F0051441D?OpenDocument
the example uses: "Generate User Event" to fire an event.
The event is fired within an While Loop where two inputs are compared (polling the input all the time....)
I would like to generate an Event on a change of a variable without having to poll.
Is this possible?
thanks a lot
thomas

Hi Thomas,
you can use shared variables and LabVIEW DSC on your RT target without polling but otherwise there's no possibility to avoid polling completely.
Here are some interesting links on this issue:
"Installing LabVIEW DSC, SQL, or MSDE on a Real-Time Target": http://digital.ni.com/public.nsf/allkb/52CC76196A480C6C86256F8900592A25
This page contains also other interesting links on this issue!
http://digital.ni.com/manuals.nsf/websearch/12BCE84BAF96E2AE862574330022EC46
"Using the LabVIEW Shared Variable": http://zone.ni.com/devzone/cda/tut/p/id/4679
"Using Shared Variable Events on Real-Time Targets": http://digital.ni.com/public.nsf/websearch/3AE325EECD9A17AD862570BA00625088?OpenDocument
The DSC features of the shared variable are limited to use on Windows targets, however you can host variables on a Windows machine and reference them on a real-time target. Another option is to create two sets of shared variables, one set hosted on the Windows side and one on the RT side, with each variable on the Windows set bound to the corresponding variable on the RT side. This would allow you for example to log data on a variable, but have it hosted on the RT side with no network dependency on the RT side to the Windows side.
I hope these informations help you!
Best regards
Suse
Certified LabVIEW Developer (CLD)

Using Dynamic Events in PC based RT Target

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