[etherlab-users] FW: possible master problems

[Ian Norton]

had to remove xml file as too big to post!

-----Original Message-----
From: Ian Norton 
Sent: 09 March 2010 10:24
To: 'Florian Pose'
Subject: RE: [etherlab-users] possible master problems


Hi Florian,

Thanks for response.

Sorry for coding, I didn't want to change too much until I got the hang of things!!

Here's a link to the servo drive. Page 22 defines PDO's. I need the velocity interface.

http://www.kollmorgen.com/website/com/eng/download/document/srethercat_e.pdf

Attached are the o/p's you requested. Also the xml file for device.

The o/p of ethercat pdos is NULL! ie no o/p

One thing I'm still a bit confused about in terms of sending/receiving data. Using the page 22 defs, to set a velocity and a command, do I set up an ec_pdo_entry_reg_t with 2 entries having the same pdo entry index but different sub indexes, so that 2 different offsets are returned for use later with EC_WRITE??

regards
Ian

-----Original Message-----
From: etherlab-users-bounces at etherlab.org
[mailto:etherlab-users-bounces at etherlab.org]On Behalf Of Florian Pose
Sent: 09 March 2010 08:51
To: etherlab-users at etherlab.org
Subject: Re: [etherlab-users] possible master problems


Hi Ian,

On Mon, Mar 08, 2010 at 05:13:30PM -0000, Ian Norton wrote:
> Both devices (slaves ) appear to show the same symptoms of dropping
> into PREOP state as soon as our user code establishes a master
> connection, defines a PDO and begins to write data, regardless of the
> data.

Could you please go through the following steps:

- Execute 'ethercat debug 1'
- Start your application
- Post the generated messages in /var/log/messages (file name depending
  on your Linux distribution), beginning from 'Requesting master 0'

> The Servostar s300 shows errors F23 and N17 which relate to CAN errors
> which translate to -: Drive tries to establish communication, but
> there is no other node, or CAN nodes have different baud rates, bus
> cable defect, reflections because of missing or wrong bus
> terminators!, or CAN sync is not logged in, or CAN sync is activated,
> but is not sent synchronously from the controller, if at all!

As far as I see, the drive is not included in the modified example
application you posted. BTW, it irritates people searching for possible
problems, if you use the identifier Beckhoff_EL3102 to operate a
different kind of device.

> I have been to Festo (UK) and they could not resolve my problem and
> pointed to the Master as being at fault?

Yes, it's always the master ;-)

Please post the output of the following commands in addition:

ethercat sl -v
ethercat cf -v (when your application is loaded)
ethercat pdos

> Have you any ideas please? We are getting quite desperate now!

I am sure, we will find out, what the problem is.

-- 
Best regards,
Florian Pose

http://etherlab.org
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