I think that all of the big industrial automation suppliers have moved
to some variant of Ethernet. Siemens has Profinet, Allen Bradley has
Ethernet IP, Allen Bradley was using Sercos and is moving away from it.
I think that is saying a lot. I've used Siemens Ethernet solution
and it is fairly painless to configure and install. AB's Ethernet/IP
is also fairly easy to use. China recently blessed Ethercat, so it
will be very interesting to see what Siemens does with that. Siemens has
become very popular in China.
Here is a write up on AB regarding Sercos vs Ethernet IP. Its pretty
clear which way they are going.
https://media.distributordatasolutions.com/Rockwell/files/File_PowerFlex_755_AC_Drives_MOTION-WP001_EN_1.pdf
If you are going to work on a development I would do something with
Ethernet. Some drives can handle Ethercat, Profinet, and Ethernet I/P
with different firmware. For instance, the Kollmorgen AKD drives were
sold as being able to do that about 5 years ago.
Dave
On 10/23/2017 3:32 PM, Nicklas Karlsson wrote:
I have tried different hardware for real time communication and decided for the
best quality Ethercat or maybe Sercos III is the path forward.
Only real real disadvantage is they both have chosen double with two rings in
opposite direction which probably make twice as expensive as needed, one
transceiver and a single ring had probably been more than enough for most cases.
Hardware for slave is relatively simple to find but master I do not know. I
found some implementation for linuxcnc
Nicklas Karlsson
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