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  2012  2013  2014  2015  2016  2017  2018  <20192020  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  <20192020 
<== Date ==> <== Thread ==>

Subject: Re: custom calibration
From: Michael Davidsaver via Tech-talk <tech-talk@aps.anl.gov>
To: Neil Hamilton Jr <neil.hamilton.jr@gmail.com>
Cc: tech-talk@aps.anl.gov
Date: Fri, 22 Mar 2019 20:05:50 -0700
On 3/22/19 4:21 PM, Neil Hamilton Jr via Tech-talk wrote:
> All,
> I've created a custom calibration subroutine (non-linear).  I would like to receive raw ADC values into the subroutine record and calibrate via the custom function.  However, my users will want to see the original raw value along with the calibrated value.  Is it possible to pass both the raw and calibrated values to an ai record for users to subscribe to?  Basically want one PV with all the raw info and have my custom calibration run when the PV comes in.  Or do i just need to have two records?  An ai record with raw that forward links to the subroutine record for the calibration.

It is simplest to put the two different values in two different records as you describe.

The only additional point I'll mention is the use of the TSEL field to copy timestamps.
This would ensure that both updates of raw and cooked values have exactly matching
timestamps, which makes the pairs easier to recognise.

record(ai, "RAW") {
    field(FLNK, "OVEN")
}

record(sub, "OVEN") {
    field(INPA, "RAW")
    # ...
    field(FLNK, "COOKED")
}

record(ai, "COOKED") {
    field(INP , "OVEN")
    field(TSEL, "RAW.TIME")
}

References:
custom calibration Neil Hamilton Jr via Tech-talk

Navigate by Date:
Prev: custom calibration Neil Hamilton Jr via Tech-talk
Next: pvget is timing out Ivashkevych, Oksana via Tech-talk
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  <20192020 
Navigate by Thread:
Prev: custom calibration Neil Hamilton Jr via Tech-talk
Next: pvget is timing out Ivashkevych, Oksana via Tech-talk
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  <20192020 
ANJ, 23 Mar 2019 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·