RE: device support for output connected to volatile device

["Mark Rivers" <rivers@cars.uchicago.edu>]

No, that will process the output record, rewriting the output to the
device, which is generally not what is desired.

How about changing the output link to:
   field(OUT,  "mySettingAO NPP") 

But if the record does not process then channel access monitors will not
be posted, so operator displays will not update?

Mark

> -----Original Message-----
> From: tech-talk-bounces@aps.anl.gov 
> [mailto:tech-talk-bounces@aps.anl.gov] On Behalf Of Emmanuel Mayssat
> Sent: Monday, December 03, 2007 6:50 PM
> To: John Dobbins
> Cc: EPICS Tech-Talk
> Subject: Re: device support for output connected to volatile device
> 
> On Mon, 2007-12-03 at 18:17 -0500, John Dobbins wrote:
> > output records it is not obvious how to deal with this. I 
> would like the output 
> > values displayed on the operator screen to be correct even 
> when they are changed 
> >   via means external to EPICS.
> 
> You *may* be able to do this with a calcout with "on change" algorithm
> 
> record(calcout, "myCO") {
>   field(SCAN, ".1 second")
>   field(INPA, "mySettingReadbackAI NPP")
>   field(OOPT, "On Change")
>   field(OUT,  "mySettingAO PP")
>   field(CALC, "A")
> }
> 
> Just an idea,
> 
> --
> Emmanuel
> 
> 
>