EPICS Controls Argonne National Laboratory

Experimental Physics and
Industrial Control System

1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  <20202021  2022  2023  2024  Index 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  <20202021  2022  2023  2024 
<== Date ==> <== Thread ==>

Subject: Re: PV Access
From: "Kivel Niko \(PSI\) via Tech-talk" <tech-talk at aps.anl.gov>
To: "Johnson, Andrew N." <anj at anl.gov>
Cc: "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov>
Date: Wed, 25 Mar 2020 22:32:43 +0000

Hi Andrew


may I piggyback on this question? I got another documentation related question.

Some time ago I tried to use JSON input links, but failed w/ anything but pva.

DB example is below, based on this doc https://epics.anl.gov/base/R7-0/3-docs/links.html


record(ai, "${SYS}:constFloatPi") {

  field(INP,  3.14159265358979)

  field(PREC, 9)

  field(PINI, "NO")

  field(DESC, "ai, holding Pi, PINI=0")

}


# db input link

# not working: error --> dbJLinkInit: Link type 'db' not found

record(ai, "${SYS}:dbInput") {

  field(INP, {db:"${SYS}:constFloatPi"})

}


Can you please point out were the current documentation of the JSON link feature can be found? Or comment on the error "Link type 'db' not found" I receive?


best

Niko


--
Paul Scherrer Institute
Dr. Niko Kivel
Forschungsstrasse 111
WBGB/017
5232 Villigen PSI
Switzerland

phone: +41 56 310 2226
email: niko.kivel at psi.ch



From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Johnson, Andrew N. via Tech-talk <tech-talk at aps.anl.gov>
Sent: Wednesday, March 25, 2020 21:49
To: Rolf Keitel
Cc: EPICS tech-talk
Subject: Re: PV Access
 
Hi Rolf,

There is a README.md in your base-7.x/modules/pva2pva directory which has one example, or look here. Look at the QSRV documentation at https://epics-base.github.io/pva2pva/qsrv_page.html#qsrv_group_def for details.

HTH,

- Andrew


On Mar 25, 2020, at 3:29 PM, Rolf Keitel via Tech-talk <tech-talk at aps.anl.gov> wrote:

I am looking for an introductory document which teaches me how to create an IOC database with structured data for PV Access.
Looks like I am too blind to find it.
 
Thanks – rolf -
 
Rolf Keitel, Ph.D
TRIUMF, 4004 Wesbrook Mall
Vancouver, BC, V6T 2A3
Tel.: 604 222 7453
 
-- The old generation has to die off so that a new set of idiots can make the same mistakes all over again --

-- 
Complexity comes for free, simplicity you have to work for.


Replies:
Re: PV Access Ralph Lange via Tech-talk
References:
PV Access Rolf Keitel via Tech-talk
Re: PV Access Johnson, Andrew N. via Tech-talk

Navigate by Date:
Prev: Re: PV Access Johnson, Andrew N. via Tech-talk
Next: Re: PV Access Ralph Lange via Tech-talk
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  <20202021  2022  2023  2024 
Navigate by Thread:
Prev: Re: PV Access Johnson, Andrew N. via Tech-talk
Next: Re: PV Access Ralph Lange via Tech-talk
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  <20202021  2022  2023  2024 
ANJ, 26 Mar 2020 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·