EPICS Controls Argonne National Laboratory

Experimental Physics and
Industrial Control System

1994  1995  1996  1997  <19981999  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  <19981999  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: setting scan rates
From: Geoff Savage <[email protected]>
To: [email protected]
Date: Thu, 27 Aug 1998 11:29:05 -0500
Hello,

I'm using Epics v3.12.  I added scan rates of .05 second (20 Hz), .025
second (40 Hz), and .016667 second (60 Hz) to the list in choiceGbl.ascii.
I rebuilt default.dctsdr and found these three rates added to the file.
The problem is that scanppl informs me that rates of ".025 second" are
running at ".016667 second".  A dbgf "record.SCAN" does return the correct
value of ".025 second".  A logic analyzer says that the scans are occuring
every 16.7 milliseconds.  The scanPeriod task that these records are in has
a priority of 51, the second highest priority.

I did another test where I removed the 60 Hz entry from choiceGbl.ascii and
saw the same thing.

I think the records are being processed by the correct scanPeriod task at
the wrong period.

Any insight is greatly appreciated.

Geoff

***********************************************************************
Geoff Savage
Software Engineer
KineticSystems Corporation		"The Data Acquisition Experts"
900 N. State St.			Phone: 815-838-0005 ext. 348
Lockport, IL 60441			Fax  : 815-838-4424
***********************************************************************

Navigate by Date:
Prev: vxWorks/cfitsio question Steven Heddle
Next: CapFast special price Dr. Chong Lee
Index: 1994  1995  1996  1997  <19981999  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 
Navigate by Thread:
Prev: Re: vxWorks/cfitsio question Nick Rees
Next: Re: setting scan rates Tim Mooney
Index: 1994  1995  1996  1997  <19981999  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 
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 ·