On 2013-05-26 09:00, Wolfgang Denk wrote:
Dear Leopold Palomo Avellaneda,
In message <[email protected]> you wrote:
My recommendation is that if you don't want to make a commercial product, or
sell your software, you can use any of the two ethercat master: soem and
etherlab. I don't think that Beckhoff makes you problems. If you want to do any
commercial product, ask to Beckoff first.
The license terms make no such difference. As soon as you distribute
any such system (no matter if commercial or otherwise, even for free)
you are violating the terms.
It's even worse than that, you are not even allowed to use it internally
without signing the EtherCAT license. At 2007 when ethercat.org was
still stating that EtherCAT was GPL compatible/friendly, we wrote an
EtherCAT master in realtime Java ([1], [2]). After having completed that
when we were about to release it to the world, we were told by Beckhoff
that in order to distribute or use it (even internal use!), we had to
sign the Beckhoff license (hence that project was scrapped!). The GPL
wording was also removed from the EtherCAT site at this time (the whole
process of triyng to get the licensing right took almost two year, after
this time we finally got an answer from Gerd Hoppe [3]).
Regards
Anders
[1]
http://fileadmin.cs.lth.se/cs/Personal/Sven_Gestegard_Robertz/publ/jtres-flexpicker.pdf
[2] http://youtu.be/xH1yUXd9krU?t=3m47s
[3] Excerpt from email 2009-04-08:
"Therefore, any use of EtherCAT requires a license in addition to a
copyright license for code such as L/GPL, regardless of any split of
code in a licensed part and a L/GPL part."
--
Anders Blomdell Email: [email protected]
Department of Automatic Control
Lund University Phone: +46 46 222 4625
P.O. Box 118 Fax: +46 46 138118
SE-221 00 Lund, Sweden
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