[ag-automation] configuration concept for fieldbus stack

[Dieter Hess]

Hello,
It is a good idea to use a real-life fieldbus for validating the fddi and Modbus/TCP is a good start, because it is really simple and requires no low level driver, because it can directly use sockets.

Unfortunatly there is no description format for Modbus (not for the devices and not for the configuration) and we at 3S have right now also no definition.
But we want to develop a configuration for modbus anyway, so I can define a configuration schema.

As you might recognize  the configuration is passed to the fddi as datastructure (a device object with hierachical childs and each with a list of parameters). So I propose to define a general XML schema to describe a configuration and there is a fieldbus independent code to read a configuration stored in such a XML-file into a configuraion data structure.

So what I will do next is to define a general XML schema for fddi-configurations and Modbus "profile" for it. I would also write some code to read it into a data structure, but I don't know which XML-parser (just a simpe one) to use for this task.

Best regards

Dieter Hess 

---------------------------------------------------- 
We software Automation. 

3S-Smart Software Solutions GmbH 
Dieter Hess 
Geschäftsführer 
Memminger Str. 151, DE-87439 Kempten 
Fon +49-831-54031-0, Fax +49-831-54031-50

Email: d.hess at 3s-software.com 
Web: http://www.3s-software.com 

Besuchen Sie das CoDeSys Internet-Forum unter http://forum.3s-software.com/

3S-Smart Software Solutions GmbH 
Geschäftsführer: Dipl.Inf.Dieter Hess, Dipl.Inf. Manfred Werner  
Handelsregister:  Kempten HRB 6186 
USt-IDNr. DE 167014915

-----Ursprüngliche Nachricht-----
Von: ag-automation-bounces at www.osadl.org [mailto:ag-automation-bounces at www.osadl.org] Im Auftrag von Robert Schwebel
Gesendet: Donnerstag, 5. Juli 2007 10:14
An: ag-automation at www.osadl.org
Betreff: [ag-automation] configuration concept for fieldbus stack

Moin,

In order to drive the current libfddi interface forward, I'd like to port some real-life fieldbusses to the framework. Because it's probably the easiest and we already have an open source implementation, I'd like to use Modbus/TCP as the first example.

The next step is to have some configuration mechanism; before I invent something new, Mr. Hess offered to open up the 3S configuration XML format when we talked about the topic in Stuttgart.

Is it possible to provide information about the format? Some examples, schema files or general documentation would be helpful.

Regards,
Robert Schwebel
--
 Dipl.-Ing. Robert Schwebel | http://www.pengutronix.de  Pengutronix - Linux Solutions for Science and Industry
   Handelsregister:  Amtsgericht Hildesheim, HRA 2686
     Hannoversche Str. 2, 31134 Hildesheim, Germany
   Phone: +49-5121-206917-0 |  Fax: +49-5121-206917-9

_______________________________________________
ag-automation mailing list
ag-automation at lists.osadl.org
https://lists.osadl.org/cgi-bin/mailman/listinfo/ag-automation