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SM73201-ARC-EV: RD-195 GUI data acquisition problems.

Matt Peterson
Prodigy 40 points

Part Number: SM73201-ARC-EV

Hello,

I am trying to acquire data using the provided Arc Detection Interface v1.14 application. I am able to connect to the GUI through the RS232 interface, and have verified the connection works via terminal. When I try to capture data, I am immediately presented with a blank graph, or occasionally a graph with very little data. I also sometimes get various error messages. I have only once been able to acquire expected waveforms (did not screenshot). I have attached screenshots below.

I am also wondering about the "RD195 acquire mode" checkbox which is not mentioned anywhere in the manual, nor is it in the manuals screenshots. Should this be checked or unchecked?

Any help in solving these issues would be appreciated.

Thanks,

Matt

  • 0
    TI__Genius 14270 points

    Hello Matt,

    Sorry, I did not see this thread earlier. I have seen this type of issue due to cable issues, use of USB-COM port driver issues,  or with NI VIsa install issues.

    You can check the cable and the USB-COM adapter by use of a windows terminal program.

    Regards,

    ChrisO

  • 0 in reply to Chris Oberhauser66
    Prodigy 40 points

    Hi Chris,

    I have verified the cable works using a terminal program, and am able to send/receive with no problems. I have reinstalled the COM port drivers, and also updated my NI VISA installation. I am still having the same issues. 

    Note that the application does successfully connect to the board, there is no "No Connection to RD195" error in the bottom left corner.

    I have used a COM port sniffer while attempting to capture data and have attached screenshots below. You can see that the 'get w 2000' command is getting sent, and that the raw ADC data is received. The second screenshot shows some data under normal conditions, while the third screenshot shows some data with the self test button is pressed down. I believe these results are as expected. 

    Any further advice would be very helpful.

    Thanks,

    Matt

  • 0 in reply to Matt Peterson
    Prodigy 40 points

    I have found a workaround seeing as I am still unable to capture data using the application. Sending the CLI command "get w 2000" captures raw ADC data that can be logged to a text file. Attempting to capture data using the application and then clicking "Accept" will save a text file to your working directory, which can be populated with the previously stored data. This file can then be imported via the "ADC Library" tab, where it can be processed, the FFT graph viewed, and the parameter tuning feature utilized. 

  • 0 in reply to Matt Peterson
    TI__Genius 14270 points

    Hi Matt,

    The ”Raw ADC data invalid” error is caused by improper response to the command “get w 2000”. The GUI doesn’t get back expected number of samples. It is possible that there is an issue with the COM port where the speed is not correct. Please check the port settings.

    Regards,

    ChrisO

  • 0 in reply to Chris Oberhauser66
    Prodigy 40 points

    Hi Chris,

    I have checked the port settings, speed is set at 115200 bits per second as stated in the user guide. Using terminal I can verify 2000 samples are received, so it seems to just be a problem with the GUI. Regardless, my workaround explained above works for our needs currently.

    Thanks,

    Matt