Hi Matthieu and Stephanie,
I replied separately to David, but perhaps should have cc'ed tech-talk
as well. I proposed that he could easily use event records combined with
a simple cron job to achieve what he wants. You could easily group
records with a desired scan time into a corresponding event and use a
cron job to trigger the event via caput (or something similar).
Erik
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Matthieu Bec
> Sent: Monday, August 11, 2008 3:38 PM
> To: Allison, Stephanie
> Cc: David Dudley; [email protected]
> Subject: Re: Scan Time Definitions
>
>
> As much as I would consider adding scan "60 second", and that
> seems human readable enough, I would ponder on SCAN="4
> hours": when you get the sample would depend on iocInit time,
> not necessarily the intented purpose?
> It sounds like a problem SNL would better address, schedule
> something to happen at midnight, 4 am etc.
>
>
> Allison, Stephanie wrote:
> > Hi,
> >
> >> The SCAN field is an enum-type. You can alter epics-base
> and extend
> >> the range of options, but it will remain enum. Are you refering to
> >> another mechanism? 'seq' records allow specifying arbitrary delay
> >> DLY<n> when to process OUT<n> links, but that's also in seconds.
> >
> > Even though SCAN is enum, the scan task finds the # of
> seconds (which it uses to delay between cycles) from the menu
> ASCII name using strtod (see 17.3.1 of the App Dev Guide).
> This is unusual. It would be nicer if menuScan.dbd had 3
> fields for every option - the enum value (index number), the
> user-friendly name, and the "raw" name which is used by the
> scan task. But this is a change to epics base and probably
> not worth the effort.
> >
> > Stephanie Allison
> >
>
>
> --
> Matthieu Bec Gemini Observatory
> Tel: +56 51 205785 c/o AURA, Casilla 603
> Fax: +56 51 205650 La Serena, Chile
>
>
>
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