12-02-2013 02:20 PM
I am having trouble viewing data coming out of a single daq assistant with mutiple analog inputs. I am using 4 different waveform graphs to show 4 different analog voltages coming in. Im using a signal split function from the single daq assisant to the 4 graphs but it seems all the graphs are showing the same values when the voltages change. The daq im using is the NI USB-6210. This is for a graduate electrical engineering project, so I'm still a beginner to labview. I have also added a "from DDT" function for each of the 4 graphs right after the signal split but that also didnt work. Also when I view the signals from the properties window of the daq assistant using the 'run' button, all the signals seem to move together but a few mV off. Im not sure if my daq is setup wrong or my block diagram.
The purpose of this project is to view 5 different voltages coming from 5v "wall" source, a small turbine generator, a battery, and a solar panel. The last output is a light sensor but all that needs to do is show when the light sensor is above 1.5V (this is "ON" for the light sensor)
I also have 4 digital outputs for switches but that part of the labview works fine!
I attached the .vi project below.
12-02-2013 08:45 PM
Hi srocha12,
Mind if you can attach the results as well? Something about "all the graphs are showing the same values when the voltages change" is kinda curious to me. Second, what do you mean by "all the signals seem to move together but a few mV off"? If you mean that the data is shown together almost at the same time is because of the dataflow theory in LabVIEW. I think this link should explain: http://www.ni.com/gettingstarted/labviewbasics/dataflow.htm
Well you can try to use the error in wiring to error out wiring as shown below (control first then acquire):
Hope it helps
Warmest regards,
Lennard.C