Hello Everyone,
I have interfaced labjack U3 with labview. I need little guidence about, How do I enable EI0 to EI7, with defined sample rate? For FI0 - FI7 I am able to recieve the data with defined sample rate but I am facing issue with interfacing EI0 to EI7. Please let me know the possible solutions.
Thanks and Regards
Anurag
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What software are you collecting data?
LJStreamUD: Just add channel 193
When using simple digital operations the channel numbers are all in sequence. So, EIO0-7 are read using digital channel numbers 8-15.
https://labjack.com/support/datasheets/u3/hardware-description/dio
Hi,
Thank you for your reply. Actually I forgot to mention in my query that we are using LabJack U3 LV and we are using ANALOG I/O function of LabJack. and we are using LabView UI to read the data from LabJack U3 LV as mentioned before in the query asked above.
Using this device I am able to read data from FI0 to FI7 channel but not from EI0 to EI7. I have attached the block diagram of the LabView sketch please find it.
As you can see in screenshot that Scan list specifies the number of channel I am able to give till 7 but if I add number 8, 9 and further it gives error.
It would be really helpful to get some solutions.
Regards
Anurag
In your screenshot you have 8 channels in your positive scan list. Does this give you an error?
I suggest you start with "U3 easy Stream Example Full.vi" and see if you can make a list with more than 8 channels that works for you.
We tried using that example "U3 easy Stream Example Full.vi". In that example also we are able to read only 8 channels. If we try to put more channels after 7 like 8,9 and further it gives error as given in the attached snapshot.
I ran some tests with that example and everything seemed to work from 4 to 16 channels. We should check our software versions. I am using firmware 1.52, and UD 3.5.
Also, please try LJStreamUD.exe to see if you can do more than 8 channels with that executable.
Hi,
I would like to thank you for your reply, As per your reply we upgraded the firmware and now we are able to read analog data for all the 16 channels. Actually we are trying to read the sinusoidal waveform using the labjack Analog Channel generated from signal generator at particular frequency and amplitude at signal generator is set to (3.3 Volt and Frequency is 10 Hz).
For first four channels from (FIO0 - FIO3) it reads same amplitude value, but for next four channels (FIO4 to FIO7) amplitude values get reduced to (0.3 to 0.5).
Anurag
Realize that the low voltage analog inputs have a normal range of 0 to 2.4 volts:
https://labjack.com/support/datasheets/u3/hardware-description/ain
Do you have a U3-HV or U3-LV?
Do some basic testing using the test panel in LJControlPanel. Use a small jumper wire to connect DAC0 to the channel you want to test, then set DAC0 to different values and see what the analog input reads.