Change TS Labview Server from Labview OI?

I have tried the NI recommended way to select the LabView server programatically from TestStand which works fine e.g.
RunState.Engine.GetAdapterByKeyName("G Flexible VI Adapter").AsLabVIEWAdapter.SetServerInfo(LabVIEWServer_RTEServer, "C:\\Program Files\\National Instruments\\Shared\\LabVIEW Run-Time\\8.6\\lvrt.dll")
But I would like to call the same functionality from a LabView Operator Interface...
After I get the engine reference I can use an Invoke node for GetAdapterByKeyname but I am struggling with the next AsLabVIEWAdapter.SetServerInfo part - I can't see these methods. Any tips/examples how to do this?
Thanks.

Simon,
Thank you for providing CIM1 with this VI! I have made a few improvements to the VI and attached it below. You don't actually have to use the Adapter.AsPropertyObject method at all, you can directly connect the Adapter reference to the Variant to Data VI and cast it to a LabVIEW Adapter.
Also, the logic that was used for determing the type of LabVIEW Server seems incorrect. According to the LabVIEWServerTypes Enumeration Help, the LabVIEWServer_ExecServer enum should be used for the LabVIEW development environment or a LabVIEW executable that registers itself as a LabVIEW ActiveX Automation Server. The LabVIEWServer_RTEServer enum should only be used for the LabVIEW Run-Time Engine. In your code it seemed like you were setting the LabVIEWServer_RTEServer enum for both the LabVIEW Run-Time Engine as well as a LabVIEW executable server. I've modified this portion of the VI as well to behave correctly.
Let me know if you have any questions.
Manooch H.
National Instruments
Attachments:
ConfigureLabVIEWAdapter.vi ‏13 KB

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Change teststand post actions from labview

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Hi
Yes it should possible.
Step step = m_SequenceContext.Step; if(nValue == 0) {
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Regards
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EDIT: This example Goto Endgroup --Sorry!
Message Edited by j_dodek on 04-21-2010 01:51 PM
=s=i=g=n=a=t=u=r=e= Click on the Star and see what happens :-) =s=i=g=n=a=t=u=r=e=
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DotNet.zip ‏17 KB

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Attachments:
QAM Demodulation.vi ‏30 KB
QAM Modulation.vi ‏30 KB
rx QAM.vi ‏57 KB

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Can we change the UCCX server from single node to the first node without affecting it's configurations

Hi all,
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Hi Aaron,
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# Copyright (c) 1993-1999 Microsoft Corp.
# This is a sample LMHOSTS file used by the Microsoft TCP/IP for Windows.
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Where can I get an example of how to call Labview.exe (Active X Server) from Visual C++

I would like to Call Labview application (as Active X Server) from Visual C++. I need any type of exemple on how to do this, any input will be greatly apriciated.

In the summer there has been an example in the Developer Zone, but i can't find it again. I can send you the attached zipfile from that example. The example is resricted to single threaded applications. In multi threaded applications you must initialise OLE in the thread where you communicate with the active-X server.
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Waldemar
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Don't forget to give Kudos to good answers and/or questions
Attachments:
VCandLabVIEW.zip ‏91 KB

Can we call LabVIEW VI's (saved at shared location say server)from two different test stations?

Hello All,
My question is related to calling and execution of LabVIEW Vis from two or more different teststation(Test System) using NI TestStand.
Following are some definitions to understand the question better
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Is there any possiblity of conflict as using same vis but on different station?
My concern is to avoid duplicacy of similar vis.Is there any better option to implement the same concern?
Thanks in advance
Regards:
Vaibhav Kanchan
Sr. Engineer
NI Certified LabVIEW Developer(CLD)
NI Certified TestStand Developer(CTD}

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Anand kumar SP
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Calling LabView ActiveX Server from TCL?

Does anyone have experience calling a LabView ActiveX server vi from
TCL? I created a simple VI with one control (labeled "A") and one
indicator (labeled "B") and a +1 adder between them. I can load and
open the VI from TCL:
package require tcom
set lv [::tcom::ref createobject "LabView.Application"]
set viPath "D:\\National Instruments\\LabView\\Activity\\a.vi"
set vi [$lv GetVIReference $viPath]
$vi FPWinOpen True
But when I try to send in data:
$vi -namedarg Call A 1
I get the error message "unknown parameter A".
I have also attempted to duplicate the "ActiveX Server" example
from the LabView help file, calling "Frequency Response.vi". This
approach encounters the same error message:
% package require t
com
3.0
% set lv [::tcom::ref createobject "LabView.Application"]
::tcom::handle0x013202F4
% set viPath "D:\\National
Instruments\\LabView\\examples\\apps\\freqresp.llb\\frequency
Response.vi"
D:\National Instruments\LabView\examples\apps\freqresp.llb\frequency
Response.vi
% set vi [$lv GetVIReference $viPath]
::tcom::handle0x01335AE8
% $vi FPWinOpen True
% $vi -namedarg Call Amplitude 10
unknown parameter Amplitude
If anyone can point me in the right direction, or give me an
example of how to do this I would greatly appreciate it.
TIA.
Leslie

In article ,
Leslie Brooks wrote:
>"Bruce Hartweg" wrote in message
>news:...
>> "Chin Huang" wrote in message
>news:[email protected]...
>> >
>> > I don't use LabView, but from the Visual Basic example I saw, it seems
>> > the Call method takes two arguments. The first is an array of parameter
>> > names and the second is an array of parameter values. Try to send in
>> > data with the Tcl command
>> >
>> > $vi Call [list A] [list 1]
>>
>> I'm unable to help the original question (don't know LAbView or VB stuff) but
>> just want to point out that [list A] is equal to A and [list 1] is the
>same as 1.
>>
>> Bruce
>
> I know what is supposed to be passed to the 'Call' method. Doing
>this:
>
>set inst [::tcom::info interface $vi]
>$inst methods
>
> produces (among other things):
>
>{1015 VOID Call {{{in out} {VARIANT *} paramNames} {{in out} {VARIANT
>*} paramVals}}}
>
> So the 'Call' method is expecting two parameters, both pointers
>to variants. TCOM appears to be passing the correct parameter type
>because the TCOM documentation says that a TCL List maps to a
>one-dimensional array of VT_VARIANT. However, the results are
>INvariant (bad pun intended):
>
>% $vi -namedarg Call Amplitude 10
>unknown parameter Amplitude
>% $vi -namedarg Call [list Amplitude] [list 10]
>unknown parameter Amplitude
>% $vi -namedarg Call [list Amplitude] [list [::tcom::na]]
>unknown parameter Amplitude
>% set i 5
>5
>% $vi -namedarg Call [list Amplitude] {incr i}
>unknown parameter Amplitude
>% $vi -namedarg Call [list Amplitude] [list [incr i]]
>unknown parameter Amplitude
>% $vi -namedarg Call Amplitude [incr i]
>unknown parameter Amplitude
>
> Who can help me with this? Who is the LabView Guru?
Try invoking the Call method without the -namedarg option. The
-namedarg option doesn't work the way you seem to think it works. The
-namedarg option provides a way to specify arguments named from the
method's parameter specification. For example, you discovered that the
Call method take two parameters named "paramNames" and "paramVals".
Tcom returns the error "unknown parameter Amplitude" because "Amplitude"
doesn't match either parameter name.

Change numeric format type under edit limits from Labview

Hello,
is it possible to change under Edit Limits the numeric format type (Hex, Decimal, Real...) from LabView?
Is there any way to change this types from Labview. Because i can't found an variable like step.result.numeric or what ever.
I hope somebody know what i mean.
thank you and best reguards

Hi Tumbler,
Within the TestStand Sequence Editor for a step which has limits, then on the Edit Limits dialog should be a control which will allow you to change the format which is set to <default>. I think you might have to click on another button which will bring up another dialog which will allow you to change the format. ( I haven't got testStand to hand at the moment, so I am working from memory).
Hope this helps
Regards
Ray Farmer
Regards
Ray Farmer

How do I connect multiple telnet clients to a telnet server in LabVIEW?

Good afternoon,
I'm writing a telnet server in LabView 6.1 that needs to handle multiple clients. To do this, I modified the "viserver\runvi.llb" example to use the telnet VI's from the Internet Toolkit instead of the TCP VI's. Then I changed the Open VI Reference to point to my telnet handler. Right now my handler just echoes the characters received from the client.
My software works ok for the first connection. After the server accepts two or more connections, characters typed in one client get echoed to all clients. In addition, only one client will accept characters at a time. The client accepting input changes randomly every few seconds as characters are entered.
Has anyon
e gotten the telnet VI's to run in parallel? Not sure if they are thread-safe or not. If you have some experience with this, I have attached my llb if you think you can help.
Thanks!
Chris Norris
Carrier Access Corp.
[email protected]
(303) 218-5826
Attachments:
CAC_Telnet_Server.llb ‏92 KB

I don't think there's a problem with the TCP/connection portion of things. My feeling is that the problem is lurking somewhere in the timing of the application, or in the way LabVIEW task scheduling/multitasking is working compared to the way you expect it to work.
For instance, I'm wondering why you stuck with 25 seconds (25000 ms) as the timeout value for the Telnet Read in Telnet Handler.vi. I assume you're expecting LabVIEW to quickly "sleep" that while loop and move on to check on the while loops of any other Telnet Handler.vi instances that might have been spawned as a result of connection requests from other remote clients.
Instead, it seems to me (on my system, anyway, with three simultaneous connections active) that LabVIEW is not cyc
ling through the other Telnet Handler.vi instances as you expect, but is only getting to them to read a byte at a time each time the main loop iterates in response to a byte appearing from the first of the three remote clients.
If you change the Telnet Read timeout to 50 ms instead, the behavior is closer to what you might expect, but still not perfect.
Because timing/threading/scheduling is a complicated subject in LabVIEW, I'm going to give LabVIEW the benefit of the doubt and assume it's operating as designed. Maybe someone else can provide more insight into what's happening in this particular case, and whether reentrancy or something else is affecting things.
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I realize that your version of things (along with the reentrancy example
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National Instruments

Error while runing diadem asynchronous script from labview on dual core processor

Urgent need of some help / advice here!
Single core runs fine... dual core produces error: Error in <XYaxis.vbs> (line: 17, column: 1): Error while opening object. The object currently open has no subobjects. Forgotten ObjClose?
The main software built in labview used for daq and analysis generates a PDF report on completion of a test, utilising diadem. For this I use the diadem express vi in labview to generate a multi page report, whereby I use for loop to iterate an array of channels for each page. This for loop has a shift register too. After each page I run a script to adjust a few parameters like linear/log, begin/end and line thickness using the diadem connectivity tookit. See script below:
Call GraphObjOpen("2D-Axis1")
Call GraphObjOpen("2DXAxis8_1")
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D2AxisXScaleType = "begin/end manual"
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D2AxisXEnd = 20000
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D2AxisYDivMode = "linear"
D2AxisYScaleType = "complete automatic"
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FOR c = 1 TO CurveNoMax
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There is also a screenshot of the vi: (script file is generated by the Dscript vi and saved to disk. then path is passed to the diadem script vi.)
What I find is, after the first report page is complete in diadem the second page ALWAYS shows the error as shown at the top. However, on my P4 laptop with single core (no hyperthreading) its runs FINE EVERY TIME with any given number of channels/pages in the report.
My current chain of thought is that the superfast dual core is doing something in parallel therefore not waiting for the previous page to complete or finish closing its object!? however, in my for loop I use a shift register as named before, surely this kind of loop cannot be divided over more cores/parallel threads? as it has to wait for the response of the previous.!?!? Im running LV 8.6 on WinXP for this project and I didnt even think multicore processing for for loops is included in this version.
The other thing is... this script used to run fine on the dual core until I added the last part that uses a for loop to get every line of the graph to be the thinkness I need. Is this for loop the culprit? Can I stop it from executing over multiple cores/threads? I read a post saying that from diadem 8 there was multi core support. this triggered my doubt
As always any comments are most appreciated
AL
:. LV2010 SP1 ... W7 .:
Solved!
Go to Solution.

Hi Al,
I have a theory, but only you can test it. In your VI screenshot, you have the boolean input for the DIAdem Execute Script.vi set to asynchronous=TRUE. My theory says that if you change that boolean (and all others like it) to asynchrous=FALSE that the error will not occur on the multicore computer. The other thing you could try would be to consolidate all REPORT commands that pertain to one REPORT page into a single ActiveX call to DIAdem. In the screenshot below you have at least 2 separate VIs calling DIAdem, so that's at least 2 separate ActiveX calls for one REPORT sheet.
Here's what I think is going on. On a multicore computer there is the potential for different ActiveX commands from LV to DIAdem to execute on different cores, which may result in a timing problem on the DIAdem side. DIAdem 11.x and earlier runs exclusively on 1 CPU, so the incoming ActiveX commands should be sequenced correctly by DIAdem's ActiveX to-do list. Theoretically DIAdem should serialize all the incoming ActiveX commands (regardless of which CPU processed them) in the order that they arrived at the DIAdem ActiveX server(s). On the sending side, LabVIEW's dataflow execution should theoretically guarantee that all the ActiveX requests are being sent in the correct order. But it is theoretically possible that the operating system's ActiveX processing queue might not send all the ActiveX commands to DIAdem in the order that it receives them from LabVIEW-- IF YOU'VE SELECTED ASYNCHRONOUS PROCESSING.
See if these clues help,
Brad Turpin
DIAdem Product Support Engineer
National Instruments

Reading a few WonderWare (RSLinx) tags from LabVIEW (client only)

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Greetings!
   Thanks for the post. Please check the following.
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   2) Also please refer to the following links which will help you on further programming
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    http://digital.ni.com/public.nsf/websearch/F92C1F2F7B35105B86256DB200628B24?OpenDocument
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Best regards
Avi Harjani

Lost ActiveX connection with LabVIEW server

I have called LabVIEW in TestStand and tried to execute the test cases .
While executing I got the following error: ( Lost ActiveX connection with LabVIEW server.
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Same error. Is anyone from NI going to bother commenting on this? It's been >8 months...

How can i update an html web page from Labview?

I intend to publish the "status" of an experiment online through an web page. I mean, if my vi is running i would like to have a phrase or indicator set on at my web page. If my Vi is not running i would like this indicator set off. This page is hosted in a server and I would like to know if its possible to update the html file from labview through an ftp connection.
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"Ftp
Transfers files to and from a computer running an FTP server service (sometimes called a daemon). Ftp can be used interactively. Click ftp commands in the Related Topics list for a description of available ftp subcommands. This command is available only if the TCP/IP protocol has been installed. Ftp is a service, that, once started, creates a sub-environment in which you can use ftp commands, and from which you can return to the Windows 2000 command prompt by typing the quit subcommand. When the ftp sub-environment is running, it is indicated by the ftp command prompt.
ftp [-v] [-n] [-i] [-d] [-g]
[-s:filename] [-a] [-w:windowsize] [computer]
Parameters
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Suppresses display of remote server responses.
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Suppresses autologin upon initial connection.
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Enables debugging, displaying all ftp commands passed between the client and server.
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I use tftp all of the time to transfer files in a similar manner. Test the transfer from the Windows command line and copy it into a VI. Pass the command line to system exec and wait until it's done.

Change TS Labview Server from Labview OI?

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