Hi:
On 3/30/09 16:43 , "Dalesio, Leo" <[email protected]> wrote:
> Add the following fields
> MSEV - measured alarm severity
> MSTA - measured alarm status
> CFIL - number of scans this status must be true before it is applied
> ACNT - number of scans this status and alarm severity have been detected
Pro:
Goes into the right direction,
configuring an "alarm" is more than setting HIGH & HSV.
To avoid going in & out of alarm, you sometimes need HYST.
To avoid alarms which are too short for anybody to do
anything about them, you sometimes need delays.
> Two questions: does the count get reset every time the alarm condition
> changes? Does it need to be more intelligent?
The above implements alarm-only-when-persists-N-seconds
as for example offered by ALH, but puts it into the IOC,
which I think is good.
But more questions:
In ALH, there's also the idea of M-alarms-within-N-seconds,
as in: PV chattered in and out of alarm M times.
Never lasted N seconds, but happened M times within N seconds,
and that might be reason to alarm.
Does anybody use that?
Should it also be configurable via a new record field?
What about disabling alarms based on machine state?
That's actually very important if you want to avoid
all those nuisance alarms when things are off on purpose.
Should each record have an "alarm disable" input
to make this easier?
While somewhat inconvenient, you can of course already
implement all the delays and conditional alarming that
you want by adding calc records and/or SNL.
Thanks,
-Kay
- References:
- Smoothing and alarm filtering on the analog input record - a proposal Dalesio, Leo
- Navigate by Date:
- Prev:
Smoothing and alarm filtering on the analog input record - a proposal Dalesio, Leo
- Next:
connections with pasynOctetSyncIO->connect John Hammonds
- Index:
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
<2009>
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
- Navigate by Thread:
- Prev:
Smoothing and alarm filtering on the analog input record - a proposal Dalesio, Leo
- Next:
Re: Smoothing and alarm filtering on the analog input record - a proposal Dirk Zimoch
- Index:
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
<2009>
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
|