MCU-PLUS-SDK-AM243X: Sporadic telegram gaps on ProfiNet when used "reversed"

Hi Robert,

We will test this topology and provide an update soon to confirm whether this issue is observed in our setup.

Could you provide answers to the following questions to better understand the issue?

1) Which Industrial Communications SDK version are you using?

2)

Robert Czech said:

This "reversed" connection has sporadic loss of telegrams

What type frames are lost in this topology? Is it just the PROFINET IO frames?

3) Could you share a wireshark capture? Is the cycle counter content in the packet not incrementing uniformly? Are all frames received but just not in correct order?

Regards,
Laxman

Hi Laxman,
thank you for your fast reply.
1.) We are using:

• IND-COMMS-SDK 9.2.0.24 mit Patch für Port 2
• MCU+ SDK 9.2.0.50 (ist im IND-COMMS-SDK enthalten)
• SysConfig 1.21.2
• LLVM/Clang 3.2.2LTS
• TMG PROFINET-Stack V6.0.0.0

2.) The frames are not really lost, the device sends the pnio frames with a very accurate timing, just the Cycle-Counter value sent with each frame is not matching. As consequence a Indu-Sol bus checker marks these frames as lost frames, due to the unexpected cycle counter value.

3.) I can send you a wireshark recording do you have an email address or link where to send this information?

Regards,
Robert

Hi Robert,

I will shortly send you mail and you can share the wireshark logs here.

Regards,
Laxman