Cannot run Simulink DLLs at the same time that the execution of the target time real VI

Hello

What I try to do is run a dll created in the Simulink model to control some servo through a CompactRio 9014.

For the moment, I managed to create three screws

(1) in the FPGA target that performs the PWM channel desired

(2) which takes the value of a variable that contains the desired position and network that feeds to the 1st VI

(3) a VI that is running on the host computer that changes the value of the network variable to change the position

I can get these three work screw and the servo controlled, but when I try to update the value of the network variable using simulation, by deploying to the target of RT simulation and running, he said:

' Access denied: this objective is already used by another host or project. »

I guess that's because the project is already connected the cRio, so I unplug and am able to deploy the model files.

However, when I try to run one of the screws in the Targer RT as well as simulation I get the error:

"This VI is downloaded to the target, but is not present in the project you are trying to deploy.  All the screws on the target will be closed unless you choose to add the missing project VI. »

With a large number of missing screws...

I'd do this wrong, i.e. is there a simpler way to control inputs FPGA using the simulation, or is there something I have missed?

Thank you

Geoff

Hi Geoff,

I think I understand what you're trying to do and what you've done so far.

If I'm not mistaken you have passed through the SIT connection manager, set your target RT (select DLL, mappings and hardware i/o) and this is his 'magic '.   If this is the case of look for the project pilot LabVIEW which was created by the SIT connection manager.  This should live in the same folder where is your DLL.  Open the pilot project, search for VI driver and open it.  Then go into the Sub - VI # 5 has with the name of the loop rate Base.  It's the Subvi who reads/writes on the material and the reads/writes the data to the DLL/OUT model.  If you want to read the output of your model and then manipulate the data that is where you need to add your code.

Inside of this Base rate loop VI there is a Subvi with number 4 and called SIT take model Timestep.  This VI is the one who makes the call to the DLL model.  The output of this VI is your data from the model.  This data goes into slot - VI # 5, which is responsible for the drafting of these data to the material.  Since you want to manipulate that data from the model, you need to recover data from the wire coming from the Subvi 4 (SIT take model Timestep) before it gets to the Subvi # 5.

In this VI of Base rate loop, you will see that there are a few empty block structures.  These images are for you to put any code you want.  The reason is that any changes you make to the driver VI and subVIs that aren't inside of these frame structure will be lost if you decide to go in the connection manager to sit DOWN again and make some changes.  The VI pilot gets new script whenever you do something in the SIT connection manager.  Whatever it is inside these frames will not be erased.

So, if you have a code you want to run in parallel to the simulation you just have to drop it inside this driver VI.  Very probably within this Subvi 5 (Base rate loop). To add your code just drop the VI in one of these settings and make any changes that him so that he can read the data in the model.    Furthermore, the model (Subvi 5) data in a table.  For the index of each element in the array and its meaning look for a file in the same folder where the DLL is named readme.txt ports.  This file has a description of the inports and small ports and their indexes.

This VI driver is called when run you the host VI so you won't have to run sepearately.

Kind regards

Ricardo

National Instruments

Systems engineering

Tags: NI Software

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