Re: Use case for ao record HOPR != DRVH or LOPR != DRVL?

[Pete Jemian <jemian@anl.gov>]

That use case is not so convincing.  Plot zoom seems a GUI client 
feature rather than a feature common to all clients of an ao PV.
On 5/30/2017 11:50 AM, Mark Rivers wrote:
> One use case would be when you want to zoom into a plot of the PV without restricting the actual output values.  You can set HOPR and LOPR without changing DRVH and DRVL.
>
> -----Original Message-----
> From: tech-talk-bounces@aps.anl.gov [mailto:tech-talk-bounces@aps.anl.gov] On Behalf Of J. Lewis Muir
> Sent: Tuesday, May 30, 2017 11:42 AM
> To: EPICS Tech-Talk
> Subject: Use case for ao record HOPR != DRVH or LOPR != DRVL?
>
> Hello, Tech-Talkers!
>
> I understand that for the ao (Analog Output) record, the HOPR and LOPR
> fields are used for the display limits and the DRVH and DRVL fields are
> used for the control limits.  However, I always end up setting HOPR =
> DRVH and LOPR = DRVL.  What's a use case where the display limits would
> be different from the control limits (i.e., HOPR != DRVH or LOPR !=
> DRVL)?
>
> Thanks!
>
> Lewis
--
----------------------------------------------------------
Pete R. Jemian, Ph.D.                <jemian@anl.gov>
Beam line Controls and Data Acquisition, Group Leader
Advanced Photon Source,   Argonne National Laboratory
Argonne, IL  60439                   630 - 252 - 3189
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   Education is the one thing for which people
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