[etherlab-users] "EtherCAT WARNING: <N> datagrams TIMED OUT!" problem

[Anthony Sharobaiko]

On Thu, Apr 10, 2008 at 09:16:26AM +0200, Florian Pose wrote:
> Hi,
> this is really strange. This combination seemed to work perfectly
> here. Let's try to eliminate some possible causes...


Well, it started again, so I've decided to switch to 2.6.18+e100 (aka Beckhoff
FC9001) combination.

There is a problem with ec_e100 driver - it fails to load:

ec_e100: Unknown symbol ecdev_unregister
ec_e100: Unknown symbol ecdev_register

ecdev_(un)register functions are mentioned in online docs, but they couldn't
be found in ethercat 1.3.2 sources.

> 
> On Wed, Apr 09, 2008 at 04:58:20PM +0400, anthony wrote:
> > datagram timeout warnings appear when I switch on the only slave
> > device (EK1100 coupler) connected directly to realtek NIC.
> > /sys/ethercat/master0/info shows same number of sent and lost frames.
> > Number of received frames is 0.
> Does the activity indicator at the EK1100 show, that the frames are
> received at least at the slave?

When it happens, indicator blinks only thrice or so at the very beginning. I think that
bugful 8139 is a culrit.
> 
> > Also note that starting/stopping ethercat master somehow changes
> > realtek card MAC address (00:11:6B:95:32:FD -> ff:ff:db:b6:ff:ff),
> > preventing subsequent launches without setting MASTER0_DEVICE to FFs.
> 
> I never cam across something like this. Do you have the possibility to
> try another network adapter type (like e1000) for the same kernel, or
> the same network adapter on a different kernel? I'd like to know if this
> is a problem of the network device driver.

I've switched to 2.6.18 from 2.6.19. Will try it with 8139 before switching to
e100.


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