What to use? EtherCAT or Ethernet Powerlink with CANopen protocol

Hi all,
My first participation!
I know that perhaps it is not the best forum, but in any case I believe many
of you have the same problem nowadays.
Despite CAN bus is a nice and powerful field bus (I like very much compared
with any similar industrial bus), we'd need to improve notably the speed (1
Mbit/s is clearly not enough even multiplexing the 8 bytes telegrams at
R-PDO and minimizing all T-PDO). Bandwidth for Hard Real Time applications
were the Tick should be less than 1 ms and massive I/Os and Motion Drivers
should be controlled (typical CNC application) can not be limited by the 1
Mb/s (even using multiple channels: 2 or more CAN buses, as our applications
is using nowadays. 1 for I/Os and 1 o 2 more for control 4 or 8 axis with a
tick of 1 ms). In case we need "multi-channel" (i.e. 2 or more independent
CNCs running at the same platform), CAN bus drastically limits and it makes
no sense in many application.
My question is (requesting opinions):
CANopen protocol is supported by EtherCAT (ETG group) and Ehernet Powerlink
(EPGS group) and that simplify migration from CAN bus (or we could even
share both).
I would like to know Guru's opinion and those are many of you.
Thanks in advance for your contribution,

Albert Saenz
Sant Cugat del Valles - Barcelona

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