Hello,
my EtherCAT slave device runs in DC mode with 50 us cycle. One variable from the task is linked with variable from the device to establish synchronization.Here is a screenshot from TwinCAT:
So, it is running with 50 us cycle. In the CCS debugger I can see that my Application function runs every 50 us, I can read it from the uC timer.
Next, I fired Wireshark and here is what I can see:
Since I saw that in wireshark I thought that if I set 50 us cycle time it means that EtherCAT frame is sent every 50 us. If we look at the wireshark - they aren't.
So - I would like you to ask about principles:
1. How should I understand 50 us cycle time?
2. Where I can find 50 us value between frames I captured in Wireshark?
Here is one more thing I don't fully understand:
3. Why do I need frames different than LRW? In LRW I have useful data.
4. What exactly Size/Duration means? Is this parameter about sending all 5 commands? If so - is that means that I can set cycle time in DC parameters in about 11 us ?
I appreciate any help. It is hard to fully understand everything from documentation in one attempt. Moreover, I am working on ethercat network for my master thesis and nobody in my facoulty has an experience with EtherCAT. So only people I can ask are you :)
Best Regards,
Dawid.
