Simulink model to labview

Hi,
I need to implement a simple speed control for a DC motor with two cascaded PI controllers.
Is it posible to include a simulink model in a VI instead of using the simulink control blocks?
Thank you!

Hi,
You can indeed build a LabVIEW interface for a simulink model by using the Simulation Interface Toolkit.
The following link will provide you informations about this toolkit and how it works in parlicular:
=> http://zone.ni.com/devzone/conceptd.nsf/webmain/955a9d79583a0ab686256db8006672b8
Regards,
JPR
NIF

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hello,
I have developed a Simulink model in MATLAB which I want to convert into equivalent LabVIEW VI's. The simulink model is as attached. The problem here is:-
LabVIEW is not able to convert all the mechanical blocks named Ankle revolute joint, Body , joint actuator and joint sensor into equivalent LabVIEW VI.
Is it possible to convert those blocks into equivalent LabVIEW VI's?
PS:- I am using LabVIEW 2010.
Attachments:
AAFO.PNG ‏19 KB

Hi Susheel,
RFC module interface parameters (import, export , tables) can only refer to data dictionary types. Hence if you currently have one of the parameters referring to a type defined in your function group main include or in a type pool, you need to create a SE11 data dictionary structure/ table type for that and then change the data type reference.
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Aditya

Run veristand project in labview- outports of simulink model dll

I have compiled a Simulink model into a dll file now I want to use some of the outports of the simulink model in labview I can see the outports in veristand workspace but now I want to use them in labview how can I do that?

now I want to execute my .vi with a PXI and I get this problem I have saved the dll. in veristand target PXI not in the Controller I have created a project and I have saved the Veristand files in C:\ of the PXI and I have the problem below I need special sofware I have installed all the avaliable veristand software in the PXI
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Using SIT connection manager with large simulink models is extremely slow

Hello,
I'm trying to use a large simulink model in LabVIEW but once the DLL is correctly generated and the SIT connection manager is invoked to explore the model sinks, sources and parameters, it takes hours to generate the model connections tree. Afterwards, when the connections tree is completed, it is impossible to handle it because every operation performed takes a lot of time and memory (i.e. to expand a block to see which parameters are inside).
The version of SIT I'm using is 2.0.3 with LabVIEW 7.1.
Is there anybody experienced with large simulink models and SIT?
Thanks and regards.
Ignacio Sánchez Peral
SENER Ingeniería y Sistemas S.A.
Control Systems Section
Aerospace Division
C/ Severo Ochoa, 4 (PTM).
28760 Tres Cantos (Madrid) Spain.
[email protected]
Tel + 34 91 807 74 34
Fax + 34 91 807 72 08
http://www.sener.es

The VI in the Driver VI called SIT Initialize Model.vi has an input called time step (sec) (-1: use model time step) which does what you want it to. It doesn't actually affect the time step of the solver used in the built model DLL, just the rate at which the main base rate loop actually runs in real time. In fact, base rate loop period would be a better name for this control. If you set it, you won't alter your model, but you will be able to adjust the rate of the base rate loop.
Simply create a control from this input terminal on your driver VI and fill in an appropriate period in seconds. Make sure to set this value as default in the control so that the Driver VI remembers it.
You will have to take into account that your model will still think it's running at the time step it was compiled at. So your model simulation time and the actual wall clock time won't match up.
Jarrod S.
National Instruments

I am trying to integrate simulink model (.mdl) file with SIT of Labview for RCP and HIL purpose. I am using Labview 8.6, Simulink 6.6 with RTW 6.6 and RTW embedded coder 4.6 ,Visual C Express 2008 and Visual C++ Express 2008.

I am trying to integrate simulink model (.mdl) file with SIT of Labview for RCP and HIL purpose. I am using Labview 8.6, Simulink 6.6 with RTW 6.6 and RTW embedded coder 4.6 ,Visual C Express 2008 and Visual C++ Express 2008. I have selected system target file as nidll.tlc,make command as make_rtw and template nidll_vs.tmf. When I try to generate .dll file I get the following error.
Attachments:
SITProblem.JPG ‏101 KB

Hi,
No . I could not solve the issue. Presently we are using microautobox (from Dspace)for doing the RCP.
Himadri

How to use Labview 6i and Simulink model ????

HELLO I would like to use a simulink model written in matlab from labview
6i.
Can somebody help me?
NI says that there is a possibility but they don�t know it.
but - it can been done.
motti

Hi Motti,
There are at least two ways to solve this depending on the problem. One ways is to use ActiveX technology to run a simulation model and get the results in the files saved from simulink. This is good if you have an off-line problem you do the calculations in simulink than the analysis in LabVIEW. If you have to communicate with the model interactively than you should use Real-Time WorkShop to create an executable and connect to it by TCP/IP. I have VIs for both solutions. I'm planning to release a LabVIEW toolkit for Matlab Simulink. If your problem is argent we can work out some deal.
Andras Ferencz
Naturen Kft.

Simulink R2014a model and LabView

Hi,
I am involved in a project in which we are trying to integrate a model developped in Simulink R2014a in an existing LabView 2011 application.
We are looking at different alternatives without much success so far.
- Simulation Interface Toolkit: Seems obsolete, and compatible only with quite old versions of Simulink.
- Model Interface Toolkit (MIT): Eventually we are ready to upgrade the labview application to Labview 2013 in order to use Model Interface Toolkit (MIT) functionalities. In some NI pages we have found information which assumes that one uses MATLAB Real-Time Workshop® , the problem is that this is not part of R2014a anymore. Currently MATLAB reccomends the use of "Simulink coder" or "Embedded coder" in order to generate compiled models in .dll format.
Has anyone succeded in doig this?
Any link/help on which are the steps to follow?
Thanks

Hello,
These threads might provide some insight into the options available:
- http://forums.ni.com/t5/LabVIEW/Simulink-generated-c-code-to-DLL-Labview/m-p/2814284
- http://forums.ni.com/t5/LabVIEW/Using-Simulink-data-in-labview/m-p/2846534
It might be useful to explain what form your Simulink model is in - e.g. small or large, s-function based (and type), solver used, etc
Hope this helps.
Consultant Control Engineer
www-isc-ltd.com

LabView talking with Simulink model

I have a problem sending a real number to a Simulink model. Simulink
only understand the format with full stop as indicater (2.5) but
labview only want to send with comma (2,5).
I´m Using a danish windows XP, but I can´t see that this is the
problem, because I have tryed to change the settings to match the
english number system.
Please point me i the direction to fix this problem.
Thanks
M.Olsen

Hello M
In LabVIEW you are able to set the decimal point in Tools >> Options >> Front Panel. You are able to set it up to use the localized decimal point. When the localized decimal point is not used then its a dot that's used as decimal point. If you change that setting remember to reboot LabVIEW.
Regards
Mohadjer
NI-DK
Message Edited by mohadjer on 09-27-2005 08:30 AM

How to use multiple Simulink Models on on Target and One Host VI?

My ultimate goal is to run two Simulink models simultaneously from one Real Time Target PC from one LabVIEW VI. As I understand it, this is possible but I have not found a solution or example on how to do this. For debugging and demonstration purposes, I would also like to run the same setup on my windows machine. We have had SIT (and VeriStand) working with one Simulink Model for some time now. I have tried using the SIT connection manager and coping the code, but I have not had success doing this. We are using LV 2009 and Matlab 2009. Any thoughts or inputs would be appreciated. Thanks for your help.

Just dawned on me to try and open two instances of Matlab, then set the SIT server on the second instance of matlab to a different port. This worked as I got two different simulink models to run. The question is, is there a better more efficent way of doing this? Any thoughts would be welcome.

Using Simulink data in labview

Hello everyone !
I have made an algorithm in labview and the simulink model data needs to be manipulated in this algorithm. The output of this algorithm is to be fed back in simulink model. I am able to map labview front panel controls with simulink model but i cannot use its data in block diagram window. How do i do it ?

Here you have three options:
1. Create a DLL from your model and use the Model Interface Toolkit (http://sine.ni.com/nips/cds/view/p/lang/en/nid/211815) to load the model into LabVIEW;
2. Convert your model into a LabVIEW Control Design and Simulation (http://www.ni.com/white-paper/11281/en/) SubSystem and use the Control and Simulation Loop to run the model;
3. Use some sort of communication between LabVIEW and Simulink (like OPC server) to communicate between simulations. This last option, although possible, it requires some sort of synchronization between products to avoid the loop to run too fast.
Hopefully this helps,
Barp - Control and Simulation Group - LabVIEW R&D - National Instruments

Compile Errors occured when simulink models including 'cmex' by SIT

I am trying to compile a simulink model to DLL with following softwares and hardwares.
Software:
LabVIEW 8.0.1
LabVIEW Realtime 8.0.1
Simulation Interface Toolkit 3.0
MATLAB R13
Visual C++ 6.0 Service Pack 4
Target Hardware:
PXI-1042RTPXI-8196
PXI-6289
When I tried to compile a model including 'cmex' function on Simulink to DLL, compile error about Visual C++ occured. Does SIT support the model including 'cmex' functions?
When I removed the function 'cmex', compiling is working correctly.
To import original model which is written by C or other language, I strongly want to use 'cmex' functions. To avoid the compile error, if you have any ideas, please let me know.
Thanks,
Tsugo

Hello Tsugo,
I believe that it is possible to compile a DLL for SIT from a model that contains a cmex function.
To tell whether the issue is caused by SIT or not, you can try changing the RTW target file from nidll.tlc to grt.tlc (in the model's Simulation Parameters dialog, look in the Real-Time Workshop tab), and see whether the compile error still happens. If the compiler error occurs with grt.tlc, then please refer to the documentation provided by The MathWorks Inc. on how to get your cmex functions to work in Real-Time Workshop®.
If the compiler error does not occur with grt.tlc, then please post the whole text of the compiler error.
Thanks!
Andrew

[SIT 5.0] Problem with running Simulink model dll on RT target

Hello!
This a continuation of my problem described here: http://forums.ni.com/ni/board/message?board.id=170&thread.id=431616
At the moment I am using following versions of software:
LabVIEW 8.6.1
LabVIEW Real-Time 8.6.1
NI-RIO 3.1.0
Simulation Interface Toolkit 5.0.0
Microsoft Visual C++ 6.0
MATLAB 7.4.0 (R2007a)
NI cRIO-9014
I have done everything mentioned in http://digital.natinst.com/public.nsf/$CXIV/ATTACH-AEEE-7JSQXS/$FILE/readme_sit_vxworks.txt
After that I was able to build nidll and nidll_vxworks using Matlab. Then I have configured SIT Connection manager, mapped controls and indicators, selected model dll etc. But when I have tried to deploy it on RT target I got following error message:
Initializing...
Calculating dependencies...
Checking items for conflicts. This operation could take a while...
Preparing items for download. This operation could take a while...
Deploying NI_SIT_Replay.lvlib
Deploying NI_SIT_driversupportVIs.lvlib
Deploying NI_SIT_ClientConnMngr.lvlib
Deploying NI_FileType.lvlib
Deploying NI_SIT_Data Log.lvlib
Deploying XDNodeRunTimeDep.lvlib
Deploying NI_SIT_util.lvlib
Deploying NI_SIT_SITServer.lvlib
Deploying project01_Driver.lvproj
Deploying NI-cRIO9014-00E9D6B1(successfully deployed target settings)
Deploying MD5Checksum pad.vi(8,86 K)
Deploying NI_SIT_Replay.lvlib:Read Select Data Packet FIFO.vi(24,89 K)
Deploying NI_SIT_driversupportVIs.lvlibIT Driver FP Strings.vi(2,39 K)
Deploying NI_SIT_Data Log.lvlib:Allocate Data Log State Machine Buffers.vi(10,17 K)
Deploying compatWriteText.vi(9,04 K)
Deploying NI_SIT_Replay.lvlib:Wait for Ack.vi(5,29 K)
Deploying NI_SIT_SITServer.lvlibITs Read Data Buffer.vi(20,24 K)
Deploying NI_SIT_ClientConnMngr.lvlib:Find Channel.vi(8,23 K)
Deploying NI_SIT_Data Log.lvlib:Get Current Configuration from Queue.vi(9,46 K)
Deploying NI_SIT_Data Log.lvlibend New Group Probe List.vi(5,82 K)
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Deploying NI_SIT_Replay.lvlib:Create Configuration FIFO.vi(6,29 K)
Deploying NI_SIT_driversupportVIs.lvlib:sit Microsecond Timer.vi(9,62 K)
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Deploying XDNodeRunTimeDep.lvlib:loadlvalarms.vi(32,39 K)
Deploying NI_SIT_driversupportVIs.lvlibIT Task Loop.vi
Failed to download NI_SIT_driversupportVIs.lvlibIT Task Loop.vi
LabVIEW: Failed to load shared library SITs.*:TaskTakeOneStep:C on RT target device.
Deployment completed with errors
I was hoping that upgrading my software will fix all problems. But sadly, it didn't. Any idea? Many thanks for help!

Hello,
I also had quite a lot of problems using Labview 8.6.1, RT and SIT 5.0.1. I upgraded a software using Labview 7.1 and SIT 2.0.3 beeing used for 5 years now and it was real pain.
I not using the SIT as you are (just load the model from a DLL, use a timeloop to step the model and finally close the model) but it seems that SIT 5.0.1 has a bug (confirmed recently by NI tech support) concerning inputs and outputs if you are using an array.
It seems that if you use an array for the input during the transcoding of the simulink model to the DLL an index is not well taken into account resulting in a model not beeing able to read its intputs. In my case whatever the inputs data could be the outputs were always 0.
The model has been changed to use only scalar data and everything works fine, ... well using the developpement software :
I cannot generate an RT target executable as during the deployment it fails all the time.
I saw once a message concerning SIT VIs deployment errors and it happened shortly after i upgraded my target : SIT 2.0.3 was still installed after SIT 5.0.
I spent a few years without updating Labview and i am amazed at how many problems occurs with all versions above 8.0.
Good luck,

Connect hardware I/O to simulink model

Hello,
i developed a controller using simulink. It's already been testet by connecting signal generators via "simulation interface toolkit" between labview and simulink. That worked out very well. The next step would be testing the controleron the real process. Therefore I have to connect the inputs and outputs of the simulink model to measurements and manipulated variables of the real process.
Since there is no real time hardware on wich I could apply the .dll of the Simulink model for testing purpose I have to find a different way.
So here's my question: Is there a possibility to connect Simulink IN and OUTs to measurements within LabVIEW? And apart from that I want to send the manipulated variable which is calculated by simulink back to LabVIEW and via Rs232 e.g. to the real process.
I would be thankful for every answer or hint on how to fix this problem.
Solved!
Go to Solution.

Hey,
Yes, it's possible to connect IOs via customized code in the realtime driver VI.
Please have a look at the following two webcasts (they are in German, I assume you are from Germany) where this will be explained in detail.
http://zone.ni.com/wv/app/doc/p/id/wv-619 (Das LabVIEW Simulation Interface Toolkit – Teil I – Grundlagen)
http://zone.ni.com/wv/app/doc/p/id/wv-621 (Das LabVIEW Simulation Interface Toolkit – Teil II – für Fortgeschrittene)
Christian

Using Simulink models with CompactRIO via SIT

Hi there,
I am looking to use compactRIO for a Rapid Control Prototypig application and am wondering whether Simulink models can be used (via the Simulation Interface Toolkit) and deployed to CompactRIO. (I know that it is possible with PXI). Also, any ideas on ther expected performance?

Hi, RichM,
Yes, you can use SIT to create and download DLLs that come from Simulink models. Basically, the CompactRIO controller is like another RT controller, so it will be done exactly the same as in PXI. The only thing different in cRIO is that the model VIs that get scripted from SIT to do data acquisition are using Traditional DAQ VIs, so you will have to manually modify those VIs so they interface with the FPGA backplane using the Read/Write Control function. For information on how to modify the VIs, you can probably look at the following tutorial: Using CAN with the LabVIEW Simulation Interface Toolkit. This tutorial is for NI-CAN, but you can just abstract from it and use the same concepts with the Read/Write Control function.
How fast are you planning on executing? Just remember that the cRIO controllers and PXI do not have the same type of processor. Depending on the method you follow to read the information from the FPGA (either polling or by interrupts), you will get different performance. I will still recommend you go with interrupts.
I hope this helps. Let me know!
GValdes

Invalid Mapping with SIT for an outport inside a subsystem in a the simulink model.

Hello everybody,
I am trying to use SIT to target simulink models on a PXI target.
The simulink model contains a subsystem with an outport. I have created
a mapping between the signal coming out of that outport to a waveform
chart on the host VI. The mapping works fine when I run the model on
the local host but becomes invalid when I target the dll to a pxi
target.
I have been able to create a very simple simulink model and host VI
that is mimicking this problem. This model does
not do anything useful and is made to only demonstrate just this problem. I am attaching the model and the userinterface here.
Note:
I have already taken care of the fact that I can not use signal storate
reuse, block reduction and also cant use linked or linked+masked
subsystems. A testimony to this is the fact that I am able to create
mapping with other signals in the subsystem. Also outport is a virtual
block in simulink so I have created a testpoint on the signal going
into the outport to be able to probe it.
Any kind of suggestions would be appreciated.
Thanks and Regards,
Vicku.
Attachments:
files.zip ‏77 KB

You have two options to be able to probe this signal in the subsystem that should work fine for this small example you posted. Let me know if they also apply to your actual model.
You have the outport itself set as a test point currently in your subsystem block. Try setting the wire coming out of the subsystem outport as a test point and then rebuilding your dll. That should make the outport signal probable.
Instead of probing the actual outport, you could probe the signal in the subsystem that is wired into the outport. In the case of your example that would be using_subsystem/Subsystem/Sum1:1.
Hope this helps!
Message Edited by Jarrod S. on 08-23-2007 10:59 AM
Jarrod S.
National Instruments

Simulink model to labview

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