cj01910 (Customer) asked a question.

November 26, 2020 at 4:15 AM
Hi
I am trying to establish communication over Mod-bus ASCII with Delta solar Inverter RPI M6 . i used the ACC automation as an example. i did some modification to the string per delta document with no luck

thank you in advance

attached is

1- Delta mod-bus protocol guide

2- my understanding of the code

3- the click PLC program

  • 6 answers
  • 491 views

  • Garry (Customer)

    Hi cj01910,

    This looks like a dedicated ASCII protocol. It is not Modbus.

    In your send command you are sending two CR ascii characters. This does not look to be part of the protocol.

    CRC CRC is the checksum calculation and not just a static character.

    I hope this helps you out.

    Regards,

    Garry

     

    https://accautomation.ca/series/click-plc/

     

    Expand Post

  • cj01910 (Customer)

    hi Garry

     

    thank you for your response

     

    delta is publishing this as RS485 ACII protocol.

     

    thank you for noting the CR check sum.

     

    I am waiting for a response from delta Tech support. in your experience can i i still use the click plc to send the proper format ASCII string ?

    it looks like the send instruction allow for flexible string structure

     

    regards

     

     

    "

    Expand Post

  • cj01910 (Customer)

    thank you for your response. let me tested and report back

     

    thanks

    • Soft Loft (Customer)

      Hi cj01910,

       

      How is your testing of ASCII protocol? Is the problem solved?

      • cj01910 (Customer)

        i sent a request to delta to provide me with and example of string . to make sure the formatting is correct. did not hear back yet.

         

        let me know if you can help. i will keep you posted

         

        regards

         

        Expand Post

 

Did this information resolve your issue?