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<== Date ==> <== Thread ==>

Subject: RE: Automatic refresh of OPI
From: Iain Marcuson <Iain.Marcuson@sydorinstruments.com>
To: Andrew Johnson <anj@aps.anl.gov>, EPICS Tech Talk <tech-talk@aps.anl.gov>
Date: Tue, 12 Sep 2017 16:19:32 +0000
> 
> The fact that your widgets weren't updating automatically suggests to me
> that those other PVs might not have been configured correctly, because Text
> Input boxes should update automatically when they get a monitor event
> from the IOC. The fact that yours aren't implies that somehow their values
> are being changed (presumably by the hardware) without triggering record
> processing, which would trigger a CA update event and thus update the GUI
> automatically. Your approach might work fine with CS-Studio, but a different
> GUI tool might not have the same ability, so I don't recommend that you
> accept this as the right solution.
> 
> Is this a situation where those PVs can be updated from either the GUI or the
> back-end hardware? There are techniques people have developed to handle
> this correctly if it is.
> 

The PVs are divided into the "Getters" and "Setters".  The backend-variables can be set in hardware independently of EPICS.  The Getters have their OUT fields pointed at the Setters.

Iain.

Replies:
Re: Automatic refresh of OPI Andrew Johnson
References:
Automatic refresh of OPI Iain Marcuson
Re: Automatic refresh of OPI Kasemir, Kay
RE: Automatic refresh of OPI Iain Marcuson
Re: Automatic refresh of OPI Andrew Johnson

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