Experimental Physics and
Industrial Control System

Pete Jemian <[email protected]> · Tue, 30 May 2017 11:52:49 -0500

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: [email protected] [mailto:[email protected]] 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

--
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Pete R. Jemian, Ph.D.                <[email protected]>
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
      are willing to pay yet not receive.
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System