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 2020 2021 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 2020 2021 2022 2023 2024 |
<== Date ==> | <== Thread ==> |
---|
Subject: | Re: sub-array question |
From: | Geoff Savage <[email protected]> |
To: | Tech-talk Talk <[email protected]> |
Date: | Thu, 24 Apr 2008 10:29:42 -0500 |
On 4/24/08 10:53 AM, John Dobbins wrote:Dear All,
I have a waveform record which reads consecutive values from hardware memory (happens to be Modbus over ethernet). I then use a subArray record to pick out individual values. However if the hardware goes off-line (so the waveform is temporarily invalid) the subArray record changes its INDX field to 0! When the hardware comes back on-line the subArray record now points to the wrong location in the waveform.
Is this intended? Suggestions for avoiding this situation?
Hi, John.
I reported the same problem last year. An archive of the discussion is at
http://www.aps.anl.gov/epics/tech-talk/2007/msg01432.php
I wish the fix could go into an earlier version of EPICS base, but maybe
Andrew is concerned about changing the behavior and thus possibly
breaking existing databases?
-lewis
-- J. Lewis Muir Software Engineer IMCA-CAT/CARS