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TMS320F28388D: When using EtherCAT, there was a data update failure at runtime in DC mode

Xu Yujie
Prodigy 10 points

Part Number: TMS320F28388D
Other Parts Discussed in Thread: C2000WARE

I sent the TwincAT3 data to 28388D and then sent the data back. When comparing the two, I found that there were a few cases where the data was not updated, but when I checked TwincAT3, there was no lost frame

I'd like to ask  what the problem is

  • 0
    TI__Mastermind 45606 points

    Hi Xu,

    The value on the right is the data sent back to TwinCAT by the F2838x? If so, it seems it sends previous data for some reason.

    Are you utilizing our example code available in C2000WARE?Can you elaborate on how you're testing?

    Is there anything specific that could be bringing about the condition?

    Best,

    Kevin

  • 0 in reply to Kevin Allen18
    Prodigy 10 points

    HI,Kevin

    Your answer "It seems it sends previous data for some reason" helps me find the reason for the problem,this is because I use PC as the master and PLC frequency is too fast to data updating, so it send the previous data and show there is no lost frame.

    Thank you.Your answer is a great help to me

    Xu