#25 Modbus RTU Not Responding

open
5
2012-05-11
2012-05-11
Archie
No

I can't seem to get a response using RTU. I change from the Register to Comms screen and this is what I see:

RX: 0A 03 00 00 00 01
RX: A2 EB

Am I missing something or is my packet incorrect?

Discussion

  • Archie

    Archie - 2012-05-12

    I found the problem. My checksum was incorrect.

     
  • shn

    shn - 2012-06-14

    Hi, I m also facing the same problem, and I checked my CRC also but still its not responding. Its showing me the same...

    RX 01 10 00 12 00 02
    RX 04 12 34 56 78 4E
    RX 08

    I am trying to send a write registers request here.

     
  • Rufus V. Smith

    Rufus V. Smith - 2012-08-07

    I send the same messages, same CRC and it will answer them sometimes, but if it stops responding, it never recovers. It's not necessarily a CRC problem.

     

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No, thanks