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

Subject: RE: Logging change of state for binary input in Message History of CSS
From: "Kasemir, Kay" <kasemirk@ornl.gov>
To: "'ZYCHLA Emmanuel'" <emmanuel.zychla@atos.net>, "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
Date: Fri, 21 Oct 2011 12:36:31 -0400
Hi:

> I'm working with CODAC 2.1.0 framework (the ITER framework which include
> EPICS 3.14.12 and CSS 2.4.0). I would like to have in the Message History of
> CSS a message for any change value for all binary input PV.
> My question is how to configure the EPICS alarm's field (ZSV, OSV, COSV,...)
> of my binary input PV to get this behavior?
> I try several configurations but all were unsuccessful.

Why not simply archive your binary input PVs?
All changes are then stored.

The message log is not a value log.
It's a log for application messages (warnings, errors)
or alarm system traffic.
You __could__ add all your binary input PVs to the alarm handler,
configure them to generate alarms on change-of-state,
and log the alarm traffic to the message log.
But I doubt that all your binary input state changes are useful alarms
where each one requires an operator to inspect the alarm, do something about it,
acknowledge it, ...

-Kay


References:
Logging change of state for binary input in Message History of CSS ZYCHLA Emmanuel

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