pci versus pxi versus compactRIO

[dg_lbe]

Is it true the only advantage to move from a pc platform to PXI or CompactRIO is the deterministic of an acquistion?  Currently am using PCI7332 and read the encoder position and analog input all of which takes about 4ms for each iteration.  If I move to a PXI or compact RIO I don't get any advantages in speed?  I would if only the processor is faster than what I'm currently using?

Thanks for your time......

dg

[The_Hunt]

DG, 

It will really depend on what you are trying to accomplish with your application. If you are just performing simple contour moves or anything general, then you would probably want to stick with your current set up. Yes, the main advantage is a deterministic acquisition along with other benefits that come with having an embedded system. As far as speed goes, it is generally true that it will come down to the processing speed of your computer for comparison. There won't be a large difference between PCI or PXI, but the cRIO should be the "fastest" of the three. But that term is very relative, and it will mostly come down to what your application is performing. For rugged outdoor environments, specialized I/O configurations, and want to have FPGA programming then the cRIO and Soft Motion would be the better choice.