[Qscada-developers] the XML-DA protocol

[Ivan V. <iva...@ya...>]

Hi Jovan,
Hi all,

I am a new suscriber, not a programmer, just looking
for some general knowledge about these topics.

Learning the geek dialect i found that there is
available for download a new utility,

...PyOPC is a framework for rapidly creating OPC
XML-DA compliant clients and servers....A Python
Framework for the OPC XML-DA 1.0 Standard...

http://pyopc.sourceforge.net/docs/html/index.html 

Peeping into its documentation i found it quite
encouraging, 

I also found full compabillity of qt designer with
phyton. 

My guess is that we will soon have some more news
about this.

...your comments ?

My goal is to encourage some migration alternatives,
from propietary to free or open source SCADA
solutions.

Qscada is a new encouraging project that will sure
help a lot.

Best wishes,

Ivan

--- Jovan Kostovski <cho...@gm...> e
scribió:

> > 3.- Is there any good OPC for Linux? I saw a lot
> of it for Windows, but
> > I don't want to use it in a production enviroment
> and I prefer to use
> > the XML-DA protocol versus COM/DCOM ;)
> 
> Yes there are some OPC clients/servers for Linux but
> most of them are
> really expensive. They are using the DCOM for Linux 
> library
>
http://www2.softwareag.com/corporate/products/entirex/
> or they
> implement only OPC XML-DA.
> For more info on opc for linux check:
> http://www.opcconnect.com/tooltech.php

> > My main idea of the project is a dedicated machine
> with Linux getting
> > information from all the plant PLCs and store all
> the sensors values in
> > a database (postgresql or MySQL), then the SCADA
> GUI will communicate
> > with the DB and show the information to the user.
> 
> If you only need to display the values of the
> sensors (read-only, no
> commands or data send back to the PLCs) my
> suggestion is to write a
> program that will communicate with the PLCs and
> store the data in a
> database, and to setup php based web page that will
> display the data.
> 
> GREETZ, Jovan


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