[etherlab-users] Station alias usage

[Florian Pose]

Hi,

On Thu, Oct 16, 2008 at 08:41:01AM +0200, Michael Mangeng (V8tech) wrote:
> The question is whether the EtherCAT-Master is using the Station-Alias 
> Field internally to e.g. recognize slaves or anything else. If it does 
> not use it, i will use it in my software.
> 
> Problem is the following:
> E.g. Running ethercat-bus as building control bus with 10 slaves.
> Now someone disconnects slave ID=3. Slave 4 is now 3, Slave 5 is now 4 
> and so on. The building has to remain fully functionally (except of the 
> disconnected slave of course).
> 
> I want to write a unique identifier into the station alias field of 
> every registered slave so its not important at which position the slave is.
> 
> => If the ethercat-master overrwrites the station alias field without my 
> knowledge, i have to find another solution.

you can use the alias file exactly in the way you describe.

Have a look at 'ethercat alias --help' and the documentation of the
ecrt_master_slave_config() method.

-- 
Best regards,
Florian Pose

http://etherlab.org