Re: Visual SNL

[kerstien@odin.atdiv.lanl.gov (Deb Kerstiens)]

> 
> >> We are looking at the possibility of building
> >> a graphical tool to generate SNL code.
> >>
> >> Has/is anyone else looking into this ?
> >
> >Matthias was talking about it at the collaboration meeting...
> 
> In fact we are interested to collaborate on this. 
> But the priority is put on the interface between operator and SNL.
> We have a first version based on CGI communication and WEB pages and will improve this.
> The graphical tool to generate SNL code is second (if necessary).
> There are standards to create SNL code in the PLC world. I would propose to follow this 
> direction to be able to buy a drawing tool and concentrate on the SNL implementation.
> 
> The standard is called IEC 1131-3 and the organisation supporting it is PLCopen.
> 
> 	http://www.plcopen.org:81/
> 
> Several companies already provide tools to generate pseudo code which could be converted 
> into SNL code. 
> 
> Matthias
> 

Some people at Allied Signal used a PC-based graphical tool, "State Cad"??, to create
their diagrams.  They wrote a translation from that output to EPICS SNL--they said
it wasn't much work to do so.  I believe this work was done under EPICS R3.10.  I'll
contact Greg Domer and Dick Floersch at Allied Signal and ask if one of them could
give us some information.

I definitely argee with Matthias that we should use something that supports such a standard..

deb


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Deb Kerstiens		dkerstiens@lanl.gov
Phone			(505)667-3396
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