[etherlab-users] Mailbox error using coopley accelnet slave

[Florian Pose]

Hi Steve,

On Thu, Jan 29, 2009 at 08:59:25AM -0500, Stephen Glow wrote:
> In fact, the only sections of the SII that aren't included in this device 
> are the bootstrap mailbox info (not yet supported) and the PDO information.

when I tested with Jim on the last EtherCAT Plugfest, we had to correct
the standard mailbox information in words 0x0018-0x001b, that was the
only thing to get it running.

> The reason for the lack of PDO information is that our PDOs are all 
> variable.  For a device such as this I don't believe that the PDO 
> information is mandatory.

Correct, in that case the [RT]xPdo categories are not mandatory and
moreover shouldn't be included, because the they will deprecate once the
PDO configuration is altered for the first time.

> Is it possible that the lack of PDO information is causing this problem?

No, because the master reads the (dynamic) PDO configuration from the
SDOs 0x1c1x and the referenced objects.

As you probably know, Jim called me yesterday. He suggested to send me a
device for testing to eliminate this interoperability issues. The funny
thing is, that we were searching DC amps with EtherCAT interface for a
long time and we really could use two of them for one of our
applications! ;-)

-- 
Best regards,
Florian Pose

http://etherlab.org