DAQmx Multi Module Simultaneous Reading

[Hector852147]

Hi,

I'm attempting to use a cDAQ 9189 chassis with various modules (thermocouples, digital output, analog inputs). I'm running into performance issues when I start to read my tasks I made in NI MAX. I have a producer consumer setup with queues and when I read one module card of thermocouples it runs fine, once I introduce the other task with my analog inputs (0-10Vdc) signals, my program runs extremely slow. What's the best practice for completing reads from tasks and displaying them on the user interface?

Thank you

[santo_13 · Accepted solution]

The right thing to do is to try to put all the AI channels into a single task and read them in chunks of 100ms

[Hector852147]

Thank you! I didn't realize we can group across modules as well.