LP-AM243: EtherCAT: DC sync has a 680ns delay

Hi Will,

Could you please hare more details about the network topology, a block diagram showing all nodes in the network.

Also COuld you please share the wireshark logs also

Hi Nilabh, 

I need to check with customer on those info. Will update here. 

Sure, 660ns is our process path latency . Please Ask for master, topology and any wireshark logs during the measurement. It looks like delay compensation is not done by the master correctly

hi， There is the topology when I test.

Hi Nilabh, 

Customer is using demo below: 

And with similar master, configuration and test, Infineon XMC devices output DC sync signal without delay. 

Could you give more insight on our EtherCAT DC sync feature implementation? And analyze why there is fixed delay in our solution.

Regards, 

Will 

Hi Will,

We are trying to replicate the similar test in our local setup, Will try to provide an update by Tuesday. Please feel free to ping back if I have not updated by then.

Hi, Nilabh

I also use the example in new SDK "ind_comms_sdk_am243x_09_00_00_03" to test, the result is the same

Hi Matt,

We do not see this issue on our end, we suspect this has to do with your master configuration:

Please follow this guide once and re do the test on your end and let me know the results: software-dl.ti.com/.../ETHERCAT_SUBDEVICE_DEMO_TWINCAT.html

hi Nilabh

I test as the guide you told me, but it is failed, I don't konw the reason

Can you please share the wireshark  pcap and also twin cat project.

Are you able to get device in OP mode?