rs232 communication is slowing labview down

[chandler]

I have several devices that are connected to my network via a rs232 to Ethernet converter. These devices then show up as com ports on my computer. My problem is that when I read and write to these labview bogs down to the point where I can't use it (I can't use the front panel until the scanning is complete..

I am running a state machine with one of the states being "Acquire data"

In this loop I have my drivers in re-entrant sub vi's.

I am running multiple instances of these vi's at the same time.

Am I running to many at once? I am running 6 in parallel. The though here is that I can read faster in parallel than reading each device one at a time.

Any thoughts??

If I open task manager there is minimal CPU and memory usage.

I am running:

Labview 2012 -32 bit

Windows 7 -64 bit

[johnsold]

It sounds like you should be using parallel loops.  Look at the Producer/Consumer Design Pattern for guidance.

Lynn

[chandler]

Well,

I ran everything in one Sub Vi instead of parallel Sub vi's and It took the same time.

Is there something with how labview accesses the com ports?

[mikeporter]

There's nothing inherent in LV or the way that it handles serial ports that would slow things. However, there are alot of things that code can do wrong. Can you post a bit?

Mike...

[chandler]

I zipped the whole driver structure.

This was created using VI's from watlow and a little of my own addition (a couple of years ago) I am sure there are some things that need work.