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  <20122013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024  Index 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  <20122013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
<== Date ==> <== Thread ==>

Subject: Re: CSS X-Y Graph
From: Eric Norum <[email protected]>
To: John Dobbins <[email protected]>
Cc: [email protected]
Date: Tue, 21 Feb 2012 16:45:17 -0800
MEDM supports variable-length waveform plots -- set the "Count Num or Channel" to the PV holding the number of points.  I usually work around the no-monitors-on-NORD problem by forward linking my waveform records to a longin record that gets its value from the waveform NORD field -- I then set the MEDM "Count Num or Channel" to that longin record -- which does post monitors on changes.  This latter problem will be moot on arrival of 3.15, of course.

On Feb 21, 2012, at 4:36 PM, John Dobbins wrote:

> Andrew,
> 
> I don't know if this matters but my waveform is actually one of the outputs of a genSub record. It has a NOVA field but I could alternately use another output as a array length indicator field.
> 
> BTW, I am also open to doing this in EDM or MEDM or ???
> 
> John Dobbins
> 
> On 2/21/2012 7:17 PM, Andrew Johnson wrote:
>> Hi Michael,
>> 
>> On 2012-02-21 Michael Davidsaver wrote:
>>> I too have had trouble doing this.  I was able to setup a rule to set
>>> the buffer size from the NORD field of a waveform record.  The result
>>> was that, when the size was reduced, the start of the waveform was
>>> removed instead of the end.  So not very useful.
>> 
>> Also note that the NORD field of a waveform record does not get monitors
>> posted on it unless there is device support that explicitly does that, so this
>> wouldn't necessarily work too well anyway (you could forward-link the waveform
>> record to a longin that reads the NORD field and use that instead though).
>> 
>> In 3.15 any device support will still be responsible for posting monitors if
>> it sets NORD, but the record and soft device support will also do it when they
>> set NORD.
>> 
>> - Andrew
> 

-- 
Eric Norum
[email protected]



Replies:
Re: CSS X-Y Graph John Dobbins
References:
CSS X-Y Graph John Dobbins
Re: CSS X-Y Graph Michael Davidsaver
Re: CSS X-Y Graph Andrew Johnson
Re: CSS X-Y Graph John Dobbins

Navigate by Date:
Prev: Re: CSS X-Y Graph John Dobbins
Next: RE: QT-based tools: Expressions of interest requested Andrew Rhyder
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  <20122013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
Navigate by Thread:
Prev: Re: CSS X-Y Graph John Dobbins
Next: Re: CSS X-Y Graph John Dobbins
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  <20122013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
ANJ, 18 Nov 2013 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·