Argonne National Laboratory

Experimental Physics and
Industrial Control System

1994  1995  1996  1997  1998  1999  2000  2001  2002  <20032004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  Index 1994  1995  1996  1997  1998  1999  2000  2001  2002  <20032004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019 
<== Date ==> <== Thread ==>

Subject: Re: process function of record waveform and CA (caput, caget)
From: Marty Kraimer <mrk@aps.anl.gov>
To: "Liyu, Andrei" <liyua@ornl.gov>
Cc: tech-talk@aps.anl.gov
Date: Thu, 04 Dec 2003 12:58:29 -0600
Liyu, Andrei wrote:
Hi,

I wrote my device support for a waveform record. Record SCAN
field is Passive. I see next
When I use standard Epics's caput program (==dbpf IOC command?)
IOC calls process function for this the record.
When I use standard Epics's caget program (==dbgf IOC command?)
IOC doesn't like to call process function for the record. And I couldn't
read current value.
Am I right?

Yes. A Channel Access get never causes a record to process.
A Channel Access put causes processing only if the record is passive AND the field attribute pp is set TRUE in the xxxRecord.dbd file.


Please read chapter "Database Locking, Scanning, and Processing" of the Application Developer's Guide for details.


http://www.aps.anl.gov/epics/modules/base/R3-14/4-docs/AppDevGuide.pdf


Marty Kraimer


References:
process function of record waveform and CA (caput, caget) Liyu, Andrei

Navigate by Date:
Prev: Re: dynamical record loading/unloading and normal database Andrew Johnson
Next: RE: dynamical record loading/unloading and normal database Jeff Hill
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  <20032004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019 
Navigate by Thread:
Prev: process function of record waveform and CA (caput, caget) Liyu, Andrei
Next: Re: process function of record waveform and CA (caput, caget) Ben-chin K. Cha
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  <20032004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019 
ANJ, 10 Aug 2010 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·