whats the maximum achievable speed of data transfer from RT to host PC

[visuman]

Hi

    Anybody can tell me whats the maximum achievable speed of data transfer from RT to host PC, in case of both PXI and CompacRIO.

Regards

Visuman

[Ashish_Naik_NIUK]

Hi visuman,

To be honest, the dataspeed is dependent on how you architect the code, and the data communication channels that you use. 

There are many factors that influence the maximum transfer rate, including network topology, types of interface used, OS, ambient network traffic etc. 

You can control two things, packet size, and amount of sleep time between transmissions. 

By altering the delay between consecutive TCP/IP transmissions and by varying the packet sizes sent from the embedded side to the host side, you can obtain a clear picture of network characteristics between the two devices. The end result is a report of the optimal TCP/IP configuration, that is packet size and sleep time.

Check out : Developer Zone : Measuring the Maximum Amount of Data Sent Out of a Real-Time Target Device

Here are some other links that maybe useful for you.

KB 2M9ARPEW : Real-Time VI to Host VI Communication Methods

Developer Zone : Real-Time FIFO for Deterministic Data Transfer Between VIs 

Hope this helps!

[visuman]

Hi  Ashish

                Thanks for the reply

                Can i say that the Data transfer rate in some mSecs.

Regards

Visuman

[Ashish_Naik_NIUK]

Hi Visuman,

As I mentioned previously, it is generally going to be down to your setup. I don't have hardware here (as I am just a student now!) to test. The links above, have code for you to test your network speeds etc. 

The communication does depend on your data packet size, and timebase, but multiple mSec isn't going to be too far off (I assume).

The communication mediums such as TCP/IP and UDP etc are industry standards which NI adhere to.

Good luck with your application!