g+
g+ Communities
Argonne National Laboratory

Experimental Physics and
Industrial Control System

1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  <20062007  2008  2009  2010  2011  2012  2013  2014  Index 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  <20062007  2008  2009  2010  2011  2012  2013  2014 
<== Date ==> <== Thread ==>

Subject: RE: Variable scan rate
From: "Dalesio, Leo `Bob`" <dalesio@slac.stanford.edu>
To: "Emmanuel Mayssat" <emmanuel_mayssat@lynceantech.com>, "John Faucett" <faucett@lanl.gov>
Cc: <tech-talk@aps.anl.gov>
Date: Thu, 5 Jan 2006 09:08:16 -0800

Take a calcout record -----
>From the temperature controller - FLNK to an AO record that writes the index of
the .1 second menu item (is it a 3?) to the SCAN field of a calcout record
(thisCalc) that reads the temperature as follows:

INPA  temperature NPP
INPB  temperature PP
CALC  (A-B)<20?3:(A-B)<10?4:(A-B)<4?5:0
OUT	thisCalc.SCAN

This should change the SCAN field of this calc record - reducing it from .1
second, to .2 second to .5 second until it sets it back to Passive.


I'm not sure the application - but it seems ill advised to stop scanning the
temperature unless there is nothing else that would cause it to change. Isn't
there the possibility of a rupture - or sudden ice age onslaught like in the
movies?

Bob


-----Original Message-----
From: Emmanuel Mayssat [mailto:emmanuel_mayssat@lynceantech.com] 
Sent: Thursday, January 05, 2006 8:45 AM
To: John Faucett
Cc: tech-talk@aps.anl.gov
Subject: Variable scan rate

Hello ,

I would like to have a scan rate that works as follow:
( example: for temperature readback record)

The record starts in passive mode
When I change the temperature settings, the record should have a high scan rate.
When the readback stabilizes, the scan rate should decrease and after some amout of time go back to passive.

Did anybody implement this type of scan ?
If so how?

Thanks,

--
Emmanuel Mayssat
Cell: 650/793-0626
Lyncean Technologies, Inc.
"See the invisible"



Navigate by Date:
Prev: Variable scan rate Emmanuel Mayssat
Next: Re: Variable scan rate Steven Hartman
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  <20062007  2008  2009  2010  2011  2012  2013  2014 
Navigate by Thread:
Prev: Re: Building JCA1 Janet Anderson
Next: A couple of drvAsyn/devGpib questions LYNCH, Damien
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  <20062007  2008  2009  2010  2011  2012  2013  2014 
ANJ, 02 Sep 2010 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· EPICSv4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·