Remote Front Panel in LV RT?

"Getting Started --> Operate --> Connect to Remote Front Panel..." allows me to connect to a remote front panel (obviously). However, the program I am creating will need to be accessed by users with the runtime environment but not the developer environment. It seems that this is possible through the VI-in-a-web-page sytem, but that looks to me as though it would be pointlessly complicated compared to Connect to Remote Front Panel.
Is there a way for a "runtime only" user to Connect to a Remote Front panel, such as by a small application build or even something in the runtime download itself? If not, am I at least correct that the VI-in-a-web-page functionality alows remote VI control for "runtime only" users?
Edit: Waaaaait a second... is that option available to any application I make? I thought it was just on the Getting Started screen.
Huh.
(If I'm wrong about something here, feel free to correct me.)
Message Edited by DJDDA on 01-29-2008 04:41 PM

Okay... I don't think I made myself clear, and I guess I didn't understand the response. Let me try again. Please ask for clarification if you do not understand, I need to get this working.
A want a client with only the run-time environment to control one of my VI's remotely. I have not been able to make this work.
I DO NOT CURRENTLY HAVE LABVIEW "REAL TIME" (oops).
If I have a VI running in the development environment on the server, should the client be able to Connect to Remote Panel? (I'm guessing no.)
If I have a LabVIEW Application running on the server, should the client be able to Connect to Remote Panel? (I'm guessing no, at this point.)
If I have a VI running embedded in a web page, should the client be able to control it? (I'm guessing no, but I'm not sure.)
Is it possible to embed an application in a web page if the server does not have LabVIEW Real Time on it? (I'm guessing no, at this point, but again I'm not sure.)
I can easily control the VI remotely (in various ways) with another development enironment, but I need it to work for a run-time environment user.

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How can I close a remote front panel by closing only the browser window?

I control a remote front panel in a browser (from the client PC). If I don't use the 'close' - button in my program to end the remote front panel, but instead of this the 'x' of the browser window (in the right bottom corner), my program won't be close, it continues on the server. Do you know how to end a VI by closing only the browser windows?
Thanks for any help!
wolfe

I found the examples. Thanks.
But I could not find a solution yet. Now I know how to end a VI by clicking on the x of the VIwindow.
My problem is, to end a VI by clicking on the x of the BROWSER window after I loaded and controlled a remote panel VI in a browser (e.g. IE).
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Remote front panels

when I use remote front panels in LAbVIew 6.1, The Web Server and the client interact using DataSocket Technology through the ActiveX controls embebed in the web page?

> when I use remote front panels in LAbVIew 6.1, The Web Server and the
> client interact using DataSocket Technology through the ActiveX
> controls embebed in the web page?
No, it is a low-level TCP based protocol that passes the data values and
property values similar to datasocket, but not using datasocket.
Greg McKaskle

Server does not support remote front panels

hello
I'm about to command the front of my labview program remotely. I followed all the steps that I found on the NI website. when I do the test on my Intenet Explorer browser it gives me the following mesage: "Server does not support remote front panels".
I await your propostion and solutions. Sincerely

Hi,
This KB might help.
Christian

Crio to host multiple remote front panels

Hello all,
I've a question abt remote front panel hosted by a cRIO system (cRIO9068 to be more specific, running RTOS).
I have a top level VI (main) as the start up vi in my cRIO system, and it would call a subvi during run. I'd like to enable remote front panel for both the main vi and the sub vi so that I can see both front panels using a web browser. I'm not sure if such a configuration is possible at all and would like to listen to comments by users who have similar experiences.
Thank you very much!
Best,
Jidong

Hello hhaamm,
To the best of my knowledge, I don't believe it is possible to host multiple remote front panels from the same executable, and, if it is, would be very difficult. The NI Web Server configuration file only specifies one port on which an executable can run web services, like remote front panels. In, short, I am not sure how you would be able to accomplish this.
Another thing to keep in mind is that what you want to accomplish can be done in many different ways that would be much easier than creating multiple remote front panels.
One of these is to move all of your controls and indicators to the top level VI. i.e. make the data you want to see from the sub-VI an output of the sub-VI and create a new indicator for this on your top-level front panel. This way you can still use a remote front panel and can use different decorations and labels to separate the top-level and sub-VI outputs.
Another way to do this is to use the tab control to create multiple tabs, one for your top-level indicators, and one for your sub-VI indicators. This would still enable you to use remote front panels and would allow for the separation of your different indicators. Here is a note on how to do that:
http://zone.ni.com/reference/en-XX/help/371361H-01/lvhowto/creating_tab_controls/
And here is a more in-depth forum post on how to create them:
https://forums.ni.com/t5/LabVIEW/how-do-you-create-tabs-on-the-front-panel/td-p/201495
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Hope this helps!
Collin D.
Applications Engineer
National Instruments

LabVIEW Remote Front Panels and WebCT or Blackboard Integration

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Has any one had any experience with getting LabVIEW Remote Front Panels working with WebCT or Blackboard E-learing software?
Generating the Remote Front Panel is easy enough, it's incorporating the Remote Front Panel into WebCT or Blackboard that am interested in?

Hi,
Are you using FieldPoint 6.0.2? We have a Corrective Action Report (#125870) for the remote front panels for the cFP-2220 with LabVIEW 8.6 and FieldPoint 6.0.2. R&D is currently working on a fix, until then, the only known workaround is to using LabVIEW 8.5.1.
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Got it working, after much experimentation. Seems to require installing exactly the right combination of items on the RT target, as some items (web services? web configuration? the "application web server"?) apparently run a separate web server - or instance of the web server - on port 80, which prevents remote front panels from being served on that port.

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I have developed the RT application with cRIO 9075 integrated chassis. And i have access its remote front panel in client PC. Now i want to access the remote panel in the client PC without having LabVIEW runtime engine. If i connect the remote panel with that client, it shows only the vi border. i doesn't downloads the front panel.
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Remote Front Panel Problem

Hi
I am using a TAB control in a VI that is published as Remote Frontpanel.
When changing TAB the controls are often grayed out in the browser even when they are not in the running LabVIEW VI !
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Best Regards
Teddy

I see thank you. Very funny because i thought i had to do something with duplicating the real time target.
So regarding the above problem, is there any way to be connected remotely to the target and when the link is broken to reconnect without affecting the operation of the VI running?
For example, lets assume we connect to a remote front panel which has a simple VI with just a 1 second period timed loop running and for each iteration of the loop i monitor and i save the index of the loop. When i connect to the VI i request control and i click run. The VI starts running. After one minute, at loop iteration 60 the link between the host and the target breaks. The VI should continue running.
After 1 minute of broken link the network is again available.
What can i do to re-establish connection without affecting the VI operation and continue monitoring the VI. If reconnecting after 1 minute i will be expecting to see the loop iteration to be 120 and keep running. Is there any way to do this?

Hi,why I have a "DMA hardware error detected" when I try to save file as *.htm for remote front panel application?

Hi,
I try to learn how to present my data anywhere by using labview remote front panels. I use PCI-mio-16E-4 device to acquire data. After I start web server and try to save to as *.htm file, I got the "DMA hardware error detected" message. Can anyone help me to solve the problem. Thanks.

What was the actual error code?
Copyright © 2004-2015 Christopher G. Relf. Some Rights Reserved. This posting is licensed under a Creative Commons Attribution 2.5 License.

Multiple remote front panels?

I have two separate applications running with remote front panels from this KB:
How can I use Remote Front Panels with Executables?
I can not get the two to run at the same time. I was then shown this:
How can I run Two or more Executable with remote front panels?
This seems to be a little old (Version 8). I am running 2012.
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Thank you for the solution Todd. I was having the exact same problem.
LabVIEW 2013 SP1
Windows 7 64bit
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Error accessing Remote Front Panel on RT Target after upgrade to LV2011

I'm upgrading a real-time application (target is a desktop PC running the LabVIEW real-time) from LabVIEW 2009 to 2011. Under 2009, it was possible the view the main VI remotely by browsing to a static HTML page that embedded the front panel. After upgrading to LabVIEW 2011, instead of the front panel image I get an error saying "Server does not support Remote Panels." I have already gone through the list of possible causes from "Server Does Not Support Remote Panels" Error When Connecting to Remote Front Panel, and none of these resolved the problem. I am using the standard LabVIEW web server, there is a direct ethernet cable connecting my computer with the real-time system, and I have recreated the web page to reference the correct plug-in version. I reformatted the RT system and then did a clean install of the components from LabVIEW 2011 (using the Add/Remove Software feature in Measurement and Automation Explorer). I also created a new test project with a new simple VI; I was able to access that VI remotely on port 8000, but not on the default port 80 (which used to work under LabVIEW 2009). What changed in the web server between LabVIEW 2009 and 2011? Can I use the standard HTTP port 80 to serve a static page with an embedded VI, or does this now only work on other ports (and if so, why)? Will I need to recreate my entire project in LabVIEW 2011 in order to get this working at all?

Got it working, after much experimentation. Seems to require installing exactly the right combination of items on the RT target, as some items (web services? web configuration? the "application web server"?) apparently run a separate web server - or instance of the web server - on port 80, which prevents remote front panels from being served on that port.

Why does refreshing my web browser page increment the number of users connected to my Remote Front Panel?

Hi,
I'm using LabVIEW 2010 and a cRIO-9118 to broadcast my RT Front Panel on the web with a Web Server.
I successfully configured the web server to be able to control my Front Panel remotely. However, I have an issue with "Refreshing" the browser.
When I press "Enter" to search the adress of the web server, the number of users connected seems to increment by one and then tells me that "Too many users are connected to the front panel". Once this has been done, the only way to "unlock" the web server is to reboot the cRIO.
Is there any solution to avoid this behavior?
My current web browser is Internet Explorer 8.
Thank you
Mathieu Veillette, Ing Jr.
Solved!
Go to Solution.

Hi Mathieu,
Unfortunately, there currently isn't a very good solution for the problem you are facing. It seems like this is a known issue that R&D is working on. It so happens that in addition to simply refreshing, this issue also occurs if you try to access the Remote Front Panel using a second tab in a tabbed browser. One "fix" would be to invest in a higher count Remote Front Panel license. If that's not feasible, then the current recommendation would be to avoid connecting to the Remote Front Panel from a second tab or refreshing the view in your browser. Once you exceed the number of connections to the Remote Front Panel, you will have to restart the RT controller -- there isn't a way to change this default behavior. You can track any fixes by R&D by keeping note of the CAR (corrective action request) ID for this issue, which is #202702.
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Embedded Software Product Manager| National Instruments

Remote front panel SSH support?

Does the LabVIEW HTTP server which delivers remote front panel "content" have the option of running in SSH mode? If not, what are my alternatives for securing connections to remote front panel servers?

I am not aware of any options for SSH in LabVIEW. However, there are other ways to keep you remote panels secure. To prevent a user from gaining control of a VI, click the lower left corner of the front panel and select Lock Control from the shortcut menu. This option prevents a viewer from requesting control of the VI on the Web until you unlock it. Similarly, you can regain control of a VI from any Web client.
To configure more Web Server security options, select Tools»Options, select Web Server: Configuration from the top pull-down menu, and enter the Root Directory. After you enter a root directory, Web clients have access only to files in that directory and its subdirectories. All other files on your computer are not accessible on the Web. Select Web Server
: Browser Access to grant or deny viewing and/or controlling access to different IP addresses, so only known clients can view or run your application. Select Web Server: Visible VIs for control over which VIs in your Web Server directory are visible to a client, and to limit the time that a client can maintain control of a VI. Refer to the LabVIEW Help, which you can access by selecting Help»VI, Function, & How-To Help, for more information about configuring the Web Server.
Alternatively, you can program security into the VI itself. For example, you can require a user to log in when the VI first runs, and disable all other aspects of the VI until you verify the login. To do so, place a login field on one page of a tab control, the other controls on subsequent pages, and enable the other pages after the user successfully logs in.
J.R. Allen

How to display remote front panels of subvis that are already open

I inherited an RT project that uses remote front panels for nearly all the user interfaces. The host application opens a remote front panel the the top level RT vi, and there are several subvis on the RT system that are opened from that top level vi and thus displayed on the host (i.e. their "Show Front Panel When Called" properties are set TRUE).
If the Host loses its connection to the RT system when any subvi front panels are opened, and the host application is restarted, it can re-open the top level vi remote front panel, but all the RT subvis that are already open will not display their front panels. I am looking for a way to open the front panels to these subvis from the host application.
The kicker is, I need to know which subvis are actually running before I attempt to open remote front panels. Is there any way to determine what subvis are actively running (and not just in memory, such as subvis that won't get executed until the top level vi reaches a certain state)? I am thinking that I could create a list of the subvis that I need access to, check to see if any are actively running on the RT system, and then invoke a remote front panel connection with those that are running.
Does anyone have any ideas as to how I might be able to do so? Or any other suggestions? [and yes, I know that RFP communication is probably not the best way to go, but we're too entrenched in this software to start over with a new system!]

TurboPhil wrote:
If the Host loses its connection to the RT system when any subvi front panels are opened, and the host application is restarted, it can re-open the top level vi remote front panel, but all the RT subvis that are already open will not display their front panels. I am looking for a way to open the front panels to these subvis from the host application.
It might be possible to work around this behavior by placing VI invoke nodes in your top level VI that reference each of your subvis and setting the Wait Until Done invoke method to false. This should cause the subvi to close when the top level VI closes even in the case of an unexpected restart.
You can access this invode node in the functions pallet by selecting Application Control » Invoke Node and also selecting Application Control » Static VI reference. Wire the Static VI Reference to the vi reference input node and double click the Static VI Reference and select the appropriate subvi in the dialog window. Left click on the Method section of the invoke node and select Run VI. Finally right click on the Wait Until Done invoke method and select Create Constant and ensure this constant is set to false.
TurboPhil wrote:
The kicker is, I need to know which subvis are actually running before I attempt to open remote front panels. Is there any way to determine what subvis are actively running (and not just in memory, such as subvis that won't get executed until the top level vi reaches a certain state)? I am thinking that I could create a list of the subvis that I need access to, check to see if any are actively running on the RT system, and then invoke a remote front panel connection with those that are running.
You can access this information by using the Real-Time System Manager (Tools » Real-Time Module » System Manager). This can be used to show what VIs and subvis are loaded into memory and which are running.
For more information on using this tool please referere to this Knowledge Base article.
Message Edited by BLAQmx on 02-18-2008 11:40 AM
Mark
LabVIEW R&D

ASK remote front panel

hai bro i try to remote panels with labview 8.0 professional with this information :
http://zone.ni.com/devzone/cda/tut/p/id/4791
http://zone.ni.com/devzone/cda/tut/p/id/3277
and it's done, for example i give it name test then i start the web server it's works well.
but when i try to connect again with remote panel connection manager and open the project (test)
the remote panel connection manager says that they can find it certainly i've save and open it with the same name and folder where i save the project.
can youm tell me why i can't do that?
tanx before, sorry for bad english

What do you do differently the second time from the first? Are you opening it up differently? Are you using an executable? It doesn't look like it from your description but if you are there is a link below that may help. do you have a firewall up or a proxy server? The second link may help if the problems are being caused by one of these.
KnowledgeBase 3U5H27MY: How Can I Use Remote Front Panels With LabVIEW 8.x Executables?
KnowledgeBase 2ZAC2IEG: Remote Panels Through a Firewall or Proxy Server
Vince M
Applications Engineer

Remote Front Panel in LV RT?

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