<s>
MECHATROLINK	B-Protocol
is	O
an	O
open	O
protocol	O
used	O
for	O
industrial	O
automation	O
,	O
originally	O
developed	O
by	O
Yaskawa	O
and	O
presently	O
maintained	O
by	O
Mechatrolink	B-Protocol
Members	O
Association	O
(	O
MMA	O
)	O
.	O
</s>
<s>
Mechatrolink	B-Protocol
protocol	O
has	O
two	O
major	O
variants	O
:	O
</s>
<s>
MECHATROLINK-II	O
—	O
Defines	O
protocol	O
communication	O
schemes	O
through	O
serial	O
link	O
equivalent	O
to	O
RS485	O
with	O
a	O
maximum	O
speed	O
of	O
10Mbit/s	O
and	O
maximum	O
30	O
slave	O
nodes	O
.	O
</s>
<s>
MECHATROLINK-III	O
—	O
Defines	O
protocol	O
communication	O
schemes	O
over	O
Ethernet	O
with	O
a	O
maximum	O
speed	O
of	O
100Mbit/s	O
and	O
maximum	O
62	O
slave	O
nodes	O
.	O
</s>
