Experimental Physics and
Industrial Control System

Burkhard Kolb <[email protected]> · Wed, 4 Apr 2012 15:24:51 +0200

Hi Kay,
I believe that the archiver and the data server do a pretty good job.
Misleading are only the Severity and Status values in the Inspect Samples
display in the case of Interpolated data. Maybe there should be a button to
choose the raw data when one really wants to inspect data?

Burkhard

Am 04.04.2012 um 14:39 schrieb Kasemir, Kay:

> Hi:
> 
> The CSS data browser, its sample inspector etc. _show_
> the severity. They don't determine it.
> The "Channel Archiver" source in your example indicates that
> your samples are provided by the Channel Archiver's network data server.
> 
> When that network data server is asked for optimized data,
> it performs interpolation via the "plot binning" described
> on page 14 of http://ics-web.sns.ornl.gov/kasemir/archiver/manual.pdf.
> The values you see are the initial, minimum, maximum, final values within
> each plot bin, though the protocol doesn't really indicate which one is
> which.
> The status/severity is not really handled for those min/max samples.
> The point of the plot binning was to have something that looks 99% the same
> when plotted. It's not meant for introspecting each sample.
> 
> Thanks,
> Kay
> 
> 
> 
> 
> 
> From:  Burkhard Kolb <[email protected]>
> Date:  Wed, 4 Apr 2012 07:51:29 -0400
> To:  "[email protected]" <[email protected]>
> Subject:  Inspect Samples of CSS shows inconsistent SEVR
> 
> 
> Hi,
> 
> when looking at archived data with the CSS trend plot "Inspect Samples"
> tool we
> found some surprises in the archived data:
> It looks like the interpolated samples show the wrong Severity and Status.
> When I export the raw data from the archiver all value/status/severity are
> ok (in this case the LOW limit was set at 20).
> See screen shot of CSS(3.1.0.20120201):
> 
> 
> 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System