Why can't i reach the required sampling frequency?

[Cooltech]

Hi every one,

I've got troubles with my program. I wanted to measure signals from PT100 and thermocouples, but whereas my card (NI SCXI 1102B card for the thermocouple, and a PCI-6220 card for the PT100) can support 333kS/s, I can't go faster than 40S/s approximatively  (I use the optimizing timed loop rate.vi, and the part of my program in the attached file, can't run faster than 300ms, which decrease my acquisition frequency).

Is it hardware or software issue? What are my error?

cheers

R.Muller

hardware configuration:

windows XP professionnel

version 2002

service pack2

AMD Athlon(tm) XP2400+

2.00 GHz,  960 Mo RAM

LabVIEW 7.1

[Christian Mergl]

Hey,

Seems to be a programming error.

I would suggest you to first look at the DAQmx examples and build up on them.

Thanks,

Chrisitan 

[ajangot]

Duplicate: http://forums.ni.com/ni/board/message?board.id=4170&thread.id=25933