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<== Date ==> <== Thread ==>

Subject: Fwd: Tagnames
From: Paul Sichta <psichta@pppl.gov>
To: tech-talk@aps.anl.gov
Date: Wed, 10 Oct 2012 13:06:37 -0400
---------- Forwarded message ----------
From: Paul Sichta <psichta@pppl.gov>
Date: Wed, Oct 10, 2012 at 1:05 PM
Subject: Re: Tagnames
To: Jeřábek Jiří <Jiri.Jerabek@eli-beams.eu>


Jiri,

For the ITER project there is a document at
ftp://ftp.iter.org/permanent_files/io_in_cad/.../SD03_v7_4.pdf
Signal and plant system I&C Variable Naming Convention


If you are questioning restrictions about the record name itself
=================================================
You can search for answers to your EPICS questions at tech-talk:
http://www.aps.anl.gov/epics/tech-talk/index.php

Two relevant messages which are so old they may be wrong:
name length is 60 chars:
http://www.aps.anl.gov/epics/tech-talk/2005/msg00083.php
characters in PV names:
http://www.aps.anl.gov/epics/tech-talk/1994/msg00105.php

The '_' underscore is a reliable name-delimiter.

There is a Record Reference manual at:
https://wiki-ext.aps.anl.gov/epics/index.php/RRM_3-14

Strangely it does not mention PV or record name rules/restrictions.


EPICS R3.15 will likely have this info defined somewhere, and perhaps
be less restrictive.

If you use an EPICS gateway you can specify an alias (name) for a record name.



Good luck,
-ps


On Wed, Oct 10, 2012 at 11:05 AM, Jeřábek Jiří
<Jiri.Jerabek@eli-beams.eu> wrote:
> Folks,
> There is a time here to think about  tagnames (names of entities ) for the ELI
> control system.
> Technological  subparts are roughly:  cryo, vacuum, laser beam distribution,
> etc.
> I have a long time industrial experience  with a commercial  DCS and SCADA
> system but I am a novice with  EPICS.
> Could anyone from the  community  discuss with me the EPICS approach and its
> syntactical rules?
> Is the matter  completely described  within records  description, or  are
> there other points where to be careful?
> It will be surely an iteration so as a starting point I would appreciate an
> EPICS web link to the relevant document.
> Maybe somebody has implemented system tagnames. His  advices (or a related
> document)   could be of the  most value.
>
> Thank you for help,
>
> Jiri
>
>
>
> Jirií Jerabek
> SCADA Specialist
> ELI Czech Republic
>
>
> m: +420 702 004 857
> e: jiri.jerabek@eli-beams.eu<mailto:jiri.jerabek@eli-beams.eu>
> w: www.eli-beams.eu<http://www.eli-beams.eu/>
>
> Institute of Physics
> Na Slovance 1999/2
> 182 21  Praha 8 - Libeň
>
> Czech Republic
>
>
>
>


Replies:
Re: Fwd: Tagnames J. Lewis Muir
References:
Tagnames Jeřábek Jiří

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