CompactRio-Throughput Data rate

[mlenz]

I have four - 4-ch vibration modules for the CompactRio.  If I convert the sample points to I16, what would you expect the sustainable transmission or transfer rate of sample points to be... out of the CompactRio to a host computer if it is those are the only two devices on the network and there is no router or switch? 

[jeff_scharpf]

If you're using LV8, I would guess and say about 20KS/s, but I may be wrong.

I'm estimating this because I was able to sustain about 43KS/s with 8 channels.

My setup may not have been optimized though, as I was still learning the new FIFO stuff with LV8

Using LV7, I would guess about 2KS/s (for all 16 of those channels). Again, this is continous, and I don't know if I was optimized.

I'm sure others here have better performance depending upon techniques.

Regards,

Jeff

[preston_johnson]

I found this to be a very effecient architecture for transferring data over TCP.

http://zone.ni.com/devzone/conceptd.nsf/webmain/CD63FD0F746B17A686256F090065F572

[Paul M.]

Mlenz,

We recently introduced DMA for RIO in LabVIEW 8 (and RIO 2.0), which dramatically improved performance. 

Details here:
http://zone.ni.com/devzone%5Cconceptd.nsf/webmain/C1013CB24FC508EF8625708B0071B3FB?opendocument
and here:
http://zone.ni.com/devzone/conceptd.nsf/webmain/0B5FF8ED662652EE8625708C00548ED8

Also see this thread:
http://forums.ni.com/ni/board/message?board.id=280&message.id=1458&requireLogin=False

The maximum rate will vary based on a variety of factors, including processor usage, network usage/capability, and module throughput. I have seen data transfer from a CompactRIO's FPGA over TCP reach over a megabyte a second using dummy data (not actually coming from a module).