How to find all real time targets?

Hi,
Is there a function VI to list all real time targets connected to the network like what are shown in remote system under MAX? Thanks!
Tom

tom_z,
This snippet works in LV2009SP1.
Attachments:
Find RT Targets.png ‏17 KB

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How to find the real-time Zero point location ?

I want to get a real-time phase difference between current and voltage waveform with the same harmonic frequency.for this reason I must know real-time zero or peak location.could you tell me how to do it?

Hello;
The best way to do phase difference analysis is by using one of the Simultaneous Multifunction I/O DAQ boards, such as the 6110.
That board has one ADC per channel, meaning that the acquisition is trully simultaneous. If you hook up the voltage waveform to one channel and the current waveform (through a resistor) to another, you can see the phase difference in a simple graph.
Hope this helps.
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How to install Vision run-time engine to a desktop PC converted to real-time target

Hi, all
I don't know how can I install the vision run-time engine to a desktop PC which I converted to a real-time target. The same problem applies to installing real-time run-time engine and labview run-time engine to the real-time target. The only way to install software to real-time target is through "add/remove software" in MAX for remote system, but it is not for all types of run-time engine installation.
I am also confused about how to activate those run-time engines for the desktop PC as real-time target.
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Hi turtle,
Here is a link that explains how to set up a desktop PC as a real-time target. The section for Formatting & Setup should help you the most.
NI Developer Zone Tutorial: Requirements for Desktop PCs as LabVIEW Real-Time Targets
Justin D.
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How to install the NI-DAQmx driver on a real time target PC?

Hi, I’m painful about how I can install a PCI-6363 DAQmx on my real time desktop PC target. The PCI-6363 is directly connected to the real time PC. And I’m using LabVIEW 2011 and MAX 5.0.
The DAQmx device driver can be seen in software lIst in the host PC, but it can not be found in the install wizard. Is there something wrong with my host PC? or is that wrong to connect PCI-6363 with real time desktop PC?
I would be grateful for any advice that I could get here.
Solved!
Go to Solution.

Hi Zhleo,
If you are about to use the PCI-6363 with the Real-Time Desktop you are right you need to have it installed, and then you need to deploy DAQmx driver software to the real-time target.
To do that you access your real-time desktop under Remote Systems in MAX and start the Real-Time Software Wizard. There you should see DAQmx listed.
In case you do not have DAQmx listed there, see this KB: Deploying DAQmx to a Real-Time Controller or PC?
Regards,
Eirikur Runarsson
Platinum Applications Engineer
NI Denmark

How to get last Build date of a dll in the real time target

Info On My Project
I am working on LabWindows CVI 12.0 for development . This project is a real time application for hardware, which is having Phar Lap ETS as RTOS...
I am facing some problems while checking Build date of my Application file( .dll)
I have tried to use GetFileDate API. But it is not supporting for realtime Target..
So i have tried __DATE__ macro.. That also having some problems..
How to get last Build date of a dll from the real time target ??
Please Help to solve this....
Thanks
Vaishakh A K

Please reply if any one have suggestion...

How to create RT boot disk for labview real time target

Hi All
I want to use desktop PC as real time target and for this i have to boot this desktop using RT operating system. I tried to use RT disk utilities in TOOLS menu in MAX but at the end it says no disk found in A drive or B drive since i do not have flopy drive in my laptop. I can not make a PC utility USB drive also since this option is not highlighted in the options hence i can not select it. Is there a way to create this RT operating system on a CD drive or can i download this operating system from somewhere so that i can boot desktop PC as real time target. Thak you for your help.
Chauhan

Hello,
Well... you have a problem. : )
The easy solution that i can remember it's.... Buy a usb floppy disk.
Sorry, but it's the only think that i can remember.
Software developer
www.mcm-electronics.com
PS: Don't forget to rate a good anwser ; )
Currently using Labview 2011
PORTUGAL

VI Server in the real time target and Vi client under the local computer

Hi,
In my project i want to make a data communication between a vi server which is runnig in the real time target and a vi client runs under the local computer (My Computer target).
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The Front Panel options are methods. Try dropping an Invoke Node down instead of a Property Node.
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Producer/consumer architecture over network variables with Real-Time target.

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I am maintaining a producer/consumer data acquisition program to be deployed on a real-time target. The main code is deployed to and run on the real-time target during experiments, but was having trouble because the program was originally designed to write all experimental data to disk on the real time during acquisition, which puts the whole experiment at the mercy of the hard drive. I am now trying to rework the code so that the host takes care of logging, so that my time-critical loops don't have to wait.
I am currently using LabVIEW 8.5
I have two questions:
First, how can I programmatically call the data-logging subvi on the host so that it runs in parallel with the main vi which runs the experiment and collects data on the real-time? I have attached the test code that I have been working with to figure this out, but it does not run the logging vi continuously in the background. I am aware that there is better functionality for this in newer versions of LabVIEW, but I would prefer not to upgrade unless there is no other option. I would like to be able to run my data-generating vi and have it start the data logging remotely.
Second, is there a way in the host VI to read values off the network variable using an event structure rather than polling it for updates?
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Attachments:
testRemoteLogging.zip ‏124 KB

VI server
Mark the target VI as served on the machine on which it will execute and use VI server Call by reference to invoke the served VI.
This used to be taught as THE way to communicate syncronously with an RT app.
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
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"Waiting for real-time target (RT PXI target) to respond" error when the program waits interrupts

Hi there,
I have developed an application to detect interrupts generated by a electronic card and act in consequence. The program has been developed in labview but it calls a dll; that was created with labwindows. The dll is programmed to open the visa communication, enable events and install the interrupt handler and when an interrupt is detected, it reads the value of the different registers of the card and returns it to labview to visualize them.
The problem is that when the program waits for an interrupt, a prompt appears with the message "Waiting for real-time target (RT PXI target) to respond" and the only option I have is to click on the button to disconnect from the pxi or just wait. If I wait and I generate an interrupt, the prompt disappears and the application visualize the data like it was expected.
To wait for the interrupt the following code has been programmed in the function:
while (flag == 0)
Sleep (1000);
When an interrupt occurs, the value of flag changes to 1 and the function continue without any problem. I am not really sure, but probably here is the problem and probably this is not the best way to wait for an interrupt because the sleep function suspends the thread for the configured time, but at least the computing load in the PXI is between 0% and 1%. I was wondering if somebody knows how to wait for an interrupt without "lost" the communication with the PXI and if there is a better way to do it.
Any answer will be welcome and thanks for them,
Jaime
Solved!
Go to Solution.

Hello Naity,
First of all, in which thread runs the waiting process? Is it scheduled in another thread than the function setting the flag?
It scheduled in the same thread that I use to configure the communications and configure the card. Anyway, here is the pseudo code of the function interrupt that I programmed under labwindows,.
char* interrupt(void)
1. Open visa communications
2.Install handler interrupt --> status = viInstallHandler (instr, VI_EVENT_PXI_INTR, IntrHandler, VI_NULL); // the function IntrHandler will be called when an interrupt occurs
3. Enable event PXI interrupt
4. Wait
while (flag == 0)
Sleep (1000);
5. Visualize the data coming from the interrupt (registers and values measured with the card)
6. Uninstall handler interrupt
7. Close visa session
The interrupt handler function IntrHandler is called immediately when an interrupt occurs and the pseudo code is like this
ViStatus _VI_FUNCH IntrHandler(ViSession instr, ViEventType etype, ViEvent event, ViAddr userhandle)
1. Disable some functions of the card to avoid damages.
2. Read registers and put them in a buffer
3. Change the value of flag ---> flag = 1;
In labview, I call the function interrupt with a call library function node (see the capture attached) and the program reads and saves the data from returned from the function.
Secondly, I am not sure this method is the most elegant. You could for example register an event with the function and, insteand of setting a flag to 1, trigger the event and schedule it in another thread (if the function is thread safe). This could reduce your CPU Load even more and seem a bit cleaner to me.
I've never used events before in labwindows but I will try to do it in this way. But anyway, I suppose that I should; somehow, wait the event to occurs in labview while the waiting for the event is programmed inside the dll...and probably the same prompt that i am trying to avoid is going to appear again, because I am not returning the "control" to labview (I mean, labview executes the dll and waits for the event to occur. Then the execution of the labview program is stopped in the call library function node executing the dll)
Third point, which environment of development are you using?
I am working with LV 2010 sp1 and Labwindows cv 10.0.1 and with the real time module.
I did also another test, I divided the program in different functions, one to initialize the communication, another to wait until a interrupt has been detected and the other to obtain the data from the interrupt and close communications. With labview I call first with the call library function node the function to initialize, later I call inside a while loop the wait function like this
int waitAseconds (double seconds, short stop_waiting)
if(flag==1 || stop_waiting == 1)
flag = 1; //to detect the stop_waiting button
printf("flagAA =1 stop waiting = %d time = %d\n", stop_waiting, clock());
return flag;
else
SleepUS(seconds*1000000);
//a++;
printf("flag a= %d stop waiting = %d time = %d\n", flag, stop_waiting, clock());
return flag;
and when the program detects an interrupt, the function returns to labview the flag and stops the loop. Finally, it reads the values and close communications.
In this way, the prompt appears but after running the application for 10 or 20 minutes and also i checked that there is a time gap between the executions in the loop.
Thanks for your reply and your help,
Jaime
Attachments:
capture.png ‏40 KB

Show front panel of subVI on a real-time target

Hi,
I'm running an application on a real-time target (14.00). On the main front panel of the application, I have a button who open another VI with the invoke node method but this component doesn't work with Real-Time taget. So, how can I show the front panel without this method ?
Thank you

Hint: RT = there should be no GUI.
RT applications are meant to just run off on their own. GUI is not part of a real RT system since that adds a non-deterministic process to the system, adding jitter (which is a big no-no in RT). What you should be doing is making a Windows host application that can communicate with the RT system (via Network Streams, TCP/IP, etc). The host application acts as the GUI/HMI.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
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How to find all JMX ports on a server?

How to find all jmx ports on particular server (say localhost) on windows
I have multiple JVM's running on my local server, and there is extensive use of JXM mbeans by the applications running on each server. So I want to connect to all these JMX servers and to instrument the MBeans using Jconsole(Jconsole localhost:<port>). But I don't know the port numbers, and its not logged by the application.
How do I find all the ports jmx servers connected?
Note : In my case I can not instrument using the PID.
thanks,
bala K

Hi kajbj,
I tried stop/start the application, but couldn't find any difference in the netstat command. I know it should show the JMX port (I am able to see on a test application), but this application's JMX port usage is missing.
netstat -ano --> Do i need to use any other commands?
I just injected few lines of code ( to list the MBeanServers programatically), to this application (did some usual tweaks to let this code execute at some time) and its listing couple of MBeanServers and lot of MBeans.
MBeanServerFactory.findMBeanServer(null); and so on.....
Is there a way to get the port using the Management API's?
thanks,
bala K

How to find all solutions for reordering of vector

hello everyone
-I have problem in finding all possible solutions for reordering of vector.
-I have vector named (vect_temp) and I want to find all possible reordering of this vector.
-I have function named Min_diff(vect_temp,next_point) works as follows : I should gave it an element (next_point) in the vector (vect_temp) and it must generate the vector (vect_diff) that contains all possible elements next elements.
-The function nex_min(vect_temp,next_point) works as follows : I should gave it an element (next_point) in the vector (vect_temp) and it must generate the vector (vect_min) that contains all possible elements next elements.
-reordering critriea:
-Min_diff(vect_temp,next_point) and nex_min(vect_temp,next_point) and (next_point) in this first iteration is equal to any selected element in the (vect_temp). after calling the functions, if element in the (vect_diff) is equal to the element in ( vect_min) then add this element into the ordered set [ vec_ordering] and call functions Min_diff(vect_temp,next_point) and nex_min(vect_temp,next_point) again , next_point now is the equal to the element that we have been added in the previous step into the ordered set [ vec_ordering] and repeat this process until all elements in (vect_temp) are ordered according to this criteria.
- I'm able to do reordering according to the cirtira above and find one solution. but the problem is that if (vect_diff) contains many elements that equal to many elements in ( vect_min), in this case I need to do reordering for the first equal element and this will be one solution and then find reordering for the next equal element and so on.
let's consider this example:
- let (vect_temp) contains element [5,9,7,3,1]
- for the firs iteration let the next_point equal to 7
- after calling function Min_diff(vect_temp,next_point), then (vect_diff) will contain [ 5,9,3]
- after calling function nex_min(vect_temp,next_point), then ( vect_min) will contain [ 5,9]
so for now (vect_diff) and ( vect_min) will have two equal elements.
- the first solution must be that fist take the first equal element and do reordering such that ordered set [ vec_ordering] will equal to [7,5] then call functions Min_diff(vect_temp,next_point), and nex_min(vect_temp,next_point) again. the( next_point) in this iteration is qual to 5, these funtions will find next elements, let's consider that (vect_diff) and ( vect_min) will have equal element [3] then add this element to the ordered set [ vec_ordering] and repeat calling functions util all elments in (vect_temp) are added to the ordered set [ vec_ordering]. This will be one solution. now the second solution will be is to take second equal elment [9] instead of [5] and continue calling functions and finding ordered list.
so that each time vect_diff and vect_min will have many equal elements, then do reordering for first equal element this is one solution and then do reordering for the second equal element and so on.
-my code that can only find one solution that takes only first equal element in (vect_diff) and ( vect_min) and continue ordering is below
for (int y = 0; y < vect_temp.size(); y++) {
     Min_diff(vect_temp);
     nex_min(vect_temp, next_point);
    for (int i = 0; i < vect_diff.size(); i++) {
     String element_min = vect_diff.get(i).toString();
     if (vect_min.contains(element_min)) {
       vec_ordering.add(element_min);
     _2nd_min_element = element_min;
      vec_temp.removeElement(next_point);
      next_point = _2nd_min_element;
      i = vect_diff.size();
     }// end if condition
    } // end for (i)loop
}// end for (y) loop
I hope that someone can answer me how to find all posssible reordering set it is urgent pleasssssse

DarrylBurke wrote:
Two months on and you still haven't done your own homework?
[http://forums.sun.com/thread.jspa?threadID=5423090]
dbWell, nobody has given the answer yet, so how can (s)he?

Requirements for Desktop PCs as LabVIEW Real-Time Targets

Hello
I have read the Requirements for Desktop PCs as LabVIEW Real-Time Targets
http://www.ni.com/white-paper/8239/en/
and i have 2 questions:
Supported Ethernet Chipsets: Is Intel® i210AT Controller supported?
Supported Processors: Is E3 and E5 Xeon Supported?
thank you

Dear goltnum9,
Here some Whitepapers where you can read which Requirements must be given and also how do convert.
Requirements for Desktop PCs as LabVIEW Real-Time Targets
How do I Create a Desktop Real-Time System?
Kind Regards,
SG3 | Applications Engineering | National Instruments | NIG |

Where are daqmx files stored on real time target?

Hi,
I am working on an application that will be embedded in a RT desktop target. To make the system easier to maintain in the future, I would like to be able to generate a DAQmx task programatically from the *.ini file exported from MAX. This way, users don't have to know what my code is doing in order to recalibrate sensors or manage new hardware; they only have to know how to use MAX and where to store the config files on the target.
Where are daqmx task, channel, and scale information stored on a RT target? I've been through the files on the target looking for something that contains my task data but have found nothing, though dropping a system property node into a VI running on the target will give a correct list of the tasks that I have configured. (The project that contains the aforementioned VI does not have the tasks in it ie: I did not import them to the project.)
Is there a utility that will run on the RT target that can generate a task at run time from the exported *.ini files?
Thanks
CLAD
Solved!
Go to Solution.

Exahustive keyword searching brought me to an answer on the forums. I'll post a brief summary here in case anyone else uses the same keywords as I have.
1. Export config file from MAX
2. Write a VI that uses the tools in the System Management pallette to upload the configuration to the real-time target.
3. Profit.
In my case, the VI I wrote to upload the DAQmx config also generates the config files for the VIs on the host and target side, so everybody knows what the tasks are called.
CLAD

How to find all open POs and there SUM

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