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AFE031: PLC Sending and Receiving Signals

Luiz Henrique Bueno
Prodigy 80 points
Part Number: AFE031

Hello.

I am programming the F28PLC83 MCU to send and receive PLC signals through the analog front-end AFE031.

My goal is to send one single byte from one PLC and receive another response byte back. However, it is unclear for me how to do it.

I could already configure and convert the signal from digital to analog. The figure below shows the Tx_PGA output.

 

What should be my TxLine output (signal form and frequency) so my RxLine input from the other modem do the DAC conversion?

 

 

Thanks

Luiz

  • 0
    TI__Expert 5830 points
    Hello Luiz,

    I am happy to help you with this. Could you tell me the desired frequencies and communication standard you are trying to implement? Could you send me a schematic of your F28PLC83 MCU with the AFE031? I would like to check the hardware first before going into software.

    Best regards,

    Errol Leon
    Texas Instruments
    Precision Op Amp Applications
  • 0 in reply to Errol Leon6
    Prodigy 80 points

    Hello Errol,

    We are using the development kit TMDSPLCKITV4-CEN. We want to implement a feature (without a communication protocol) to determine the time of arrival (ToA) between PLC modems as simple as possible. The frequencies should be in the CENELEC range.

    Best regards,

    Luiz Bueno

  • 0 in reply to Luiz Henrique Bueno
    TI__Expert 5830 points
    Hello,

    The zero configuration GUI for this board is limited on sending a bit without a communication protocol. In this case the software will only send it via OFDM. The GUI allows you to customize the message which is translated into packets sent down the line. The transmit and receive will have a time stamp, however, it does not show enough precision to see the delta. The only other option with this GUI is to look at the transfer information, but again the same limitation with precision. I have attached a link to the document for operating the Zero Configuration software.

    www.ti.com/.../tidu310.pdf


    Best regards,

    Errol