RE: Alarm trigger for persistent values?

["Owens, PH \(Peter\)" <p.h.owens@dl.ac.uk>]

Something along the line of:

record (ai, "TEMPERATURE")
{
	field (SCAN, "1 second")
	field (INP, "CALCULATION PP MS")
}

record (calc "CALCULATION")
{
	field (CALC, "(B>C||B<D)?(A+1):0")
      field (INPA, "CALCULATION.VAL")
      field (INPB, "RAWTEMP")
	field (INPC, "RAWTEMP.HIHI")
	field (INPD, "RAWTEMP.LOLO")
	field (HIHI, "60")
      field (HHSV, "MAJOR")
}

> -----Original Message-----
> From: Bernhard Lopez [mailto:blopez@ego-gw.it]
> Sent: 21 September 2006 08:22
> To: tech-talk@aps.anl.gov
> Subject: Alarm trigger for persistent values?
> 
> 
> Hi,
> 
> At our infrastructure monitoring system we have the case that
> some temperature values should trigger an alarm only if they
> remain above/below a threshold (HIHI/LOLO) for longer than a
> defined amount of time.
> 
> As we could not find support for this feature in the documentation,
> we would be glad to receive a suggestion regarding a solution or
> implementation we could go for.
> 
> The involved sensor devices are represented by "ai" records
> with a home-made device implementation. We use EPICS release
> 3.14 on Linux.
> 
> Many thanks in advance!
> 
> Bernhard.
> 
>