[etherlab-users] EtherCAT with 250us? How is your setup?

[Mohre, Joerg]

Hi,

we use  the ethercat master stack on your controller which is powerpc with 450MHz.
It is running under linux with kernel 2.6.18 and xenomai patch.

You have to be a little bit more specific if you ask for performance data.
What do you want to do in 250us....
How many bytes to you transmit?
What does cycletime include master stack processing. control loop, transmission time...

Ok - what we have seen...

Your implementation needs ~125us to process 50 bytes PDO data.
This includes ethercat stack processing and data transmittion to Ethernet hardware.
So in simple works the ethercat part of one controller cycle.
But of course this highly depends on your implementation.

Regards

Jörg Mohre  |  Senior Software - Engineer
jmohre at moog.com
Direct:
+49 7031 622 430




-----Ursprüngliche Nachricht-----
Von: etherlab-users [mailto:etherlab-users-bounces at etherlab.org] Im Auftrag von Dr.-Ing. Olaf Marthiens
Gesendet: Donnerstag, 22. September 2016 23:09
An: etherlab-users at etherlab.org
Betreff: [etherlab-users] EtherCAT with 250us? How is your setup?

Hello,

who use ethercat masterstack with rt preempt and have a cycletime of 250us. What is the configuration and type of computer-/processor and which Linux-Kernel is used. What are the avg/max. latency? Did someone use a desktop environment, like cinnamon on the same computer ?

Best regards and thanks a lot for your reply.

Olaf

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