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<== Date ==> <== Thread ==>

Subject: Re: delay before alarm on alarm handler
From: Andrew Johnson <[email protected]>
To: [email protected]
Date: Wed, 20 Mar 2013 12:02:40 -0600
Hi James,

On 2013-03-20 James F Ross wrote:
> Does anyone know how to build in a delay for a process variable so
> that it won't alarm unless the value is in the alarm range for a
> setable period of time?  For instance, I'd like to set a particular
> variable so that it will alarm only if the value is below the LOW
> alarm setting for one second or longer.  Is this doable either through
> the alarm handler or the database file or would I have to go into the
> source code and manually program in a delay?

ALH can do this itself using $ALARMCOUNTFILTER, see

http://www.aps.anl.gov/epics/EpicsDocumentation/ExtensionsManuals/AlarmHandler/alhUserGuide-1.2.15/ALHUserGuide.html#6_3_12

In 3.15 you'll be able to configure the standard input record types to filter 
alarms too, but for now the solutions available to you are either to use  
ALH's $ALARMCOUNTFILTER or to do something a lot more complicated in a 
database or an snl program.

- Andrew
-- 
There is no such thing as a free lunch.  When invited for lunch,
it is best to check if you are there to eat, or to be eaten.
-- Clive Robinson

Replies:
Re: delay before alarm on alarm handler James F Ross
References:
delay before alarm on alarm handler James F Ross

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