Keep losing contact to my real time target(cRIO), what to do?

[aguy004@aucklanduni.ac.nz]

Hey I am having problems with my cRIO-9022, which has NI 9475 and NI 9205 modules.

I have attached a file showing the error.

The thing is, whenever I try using a timed loop or even a while loop to read in data I am getting an error.

I am reading in a .csv file that is on the pc, not the rio.

Also when I run other simple code on the cRIO, its works maybe 1 out of 3 times, with the other 2/3 times giving the same error.

If you could suggest any action to take, that would be greatley appreciated.

Regards

Alim Guy

[aguy004@aucklanduni.ac.nz]

I also get a communication error

[AB@17]

Problem may be in your installed software

once try to format your controller and reinstall sofware

[Thør]

Usually when communication is lost, it means your cRIO is using too much processor time to run your code.  It needs a bit of processor time to take care of network communication.  When you run your simple code, try putting something like a blinking light inside a 500ms timed loop.  Does this code cause your target to disconnect?  If so, does the light continue to blink once it's disconnected?

[aguy004@aucklanduni.ac.nz]

Thanks Vara Prasad, I may have to try that at some stage. 😃

[aguy004@aucklanduni.ac.nz]

Hey Kyle,

Thanks for the advice I shall try that when I get the time.

I am not running a timed loop at a quick rate (50ms), another error I am getting is when I run/try to run a .VI, a previously opened one opens up. I've attached a  really simple code which breaks up a 3 columned input .csv file into 3 outputs, which displays a row of the columns each time.

Thank you in advance for any further insight given.

Regards

Alim Guy

[aguy004@aucklanduni.ac.nz]

Okay I think the problem is that I am trying to access and write to files that are on the pc and not the compactRIO, how do I get around this??

Regards

Alim Guy

[Thør]

Hi Alim,

I think the best way around this is to access and write files on the cRIO, and then FTP those files over to your PC in your program.  This link shows a quick example of how to do the FTP transfer in LabVIEW.

[aguy004@aucklanduni.ac.nz]

Hey,

Thanks, managed to get that working, however still having connection problems. I think its something to do with the memory, because when I try to run a .VI a previously opened one opens and is running. Also whenever I stop a .VI it says communication has been lost. 

[Thør]

Does it lose connection whenever you try to stop any VI, or is it just a specific one that causes it to lose connection?