Hello everyone,
Background:
I am developing a VI for a wind tunnel application in Labview 2017 student edition. I acquire data from about 8-9 pressure transducers that output current, a voltage signal, and 12 thermocouples. I am working with three cDAQ 9172 chassis. I need to see the readings real time and acquire as much data as I can, so I have continuous samples and the least acquisition rate I can do is 5kHz. I have a producer consumer architecture to handle this.
Problem:
The way I have it set up, the VI works when I try to read only two types of signals, current and temperature, or current and voltage. However, when I try to do the three types of signals simultaneously, the VI crashes in about a minute with the error 200279 "the application is not able to keep up with hardware acquisition."
What I have tried:
- DAQ assistant settings: I have tried multiple combinations of samples to read and acquisition rate, sometimes I have less, other times more samples to read than my acquisition rate value and none work.
- Current and voltage in one chassis, thermocouples in another. Also, three different DAQ assistants. (I cannot put everything in one chassis because I'm limited in the number of slots).
What might be able to improve the VI and recommendations I've received:
- Use DAQmx VI's instead of DAQ assistant.
- Program a circular buffer.
Thoughts:
In my limited experience. I feel like the error that I'm getting of the hardware acquisition is not the issue because whenever I read only two types of signals it works just fine, even when I add more channels (acquire more information). And it is only when I read three that the VI crashes. I wonder if there's another way to configure or wire my VI for it to work. Do you think I should attempt the recommended modifications as well? Any input would be awesome. I've searched so many forums and haven't found anything pertinent. I attach my VI and snips from the block diagram.
