Real-Time Measurement and Control

cancel
Showing results for 
Search instead for 
Did you mean: 

Loop rate of DAQmx PXI-6259 in LabVIEW Real-Time

Hi all,

 

I am using LV RT8.5 with 2 PXI installed, the PXI-7358 and DAQmx PXI-6259. I wrote a program in LabView RT of a single timed loop with

time constraint 5 ms. The first program, the loop rate was OK (no delay, finished late boolean is false), however, when I added a subVi, suddenly

the loop rate became high and delay occured (finished late boolean is true).The delay could reach to 100ms 😞

 

I attached the pictures below.

1. The fine loop without subVi

2. The loop with subVi

3. The subVi

 

What I guess now the problem is because of the DAQmx create virtual channel and DAQmx start. However, If I remove these functions from the 

subVi, thus I have to connect the DAQmx create virtual channel and DAQmx start in every main program, and thus it will give so much work and make

the program more complex.

 

Are there any solutions for this. I really appreciate your help.

 

Regards,

 

Bondhan

 

Download All
0 Kudos
Message 1 of 1
(3,582 Views)