Experimental Physics and
Industrial Control System

Luedeke Andreas <[email protected]> · Tue, 04 Mar 2003 17:43:30 +0100

At the SLS we're using the alarmhandlers feature to launch commands on
a change in the severity state of an alarm group.
This can be used for example:

   * to play dedicated alarm sounds on loudspeakers (as loud as you like :-)
   * to send SMS messages to an operator mobile in case of new alarms
     (The operator has to arm the mechanism to get the next alarm only)
   * to write the alarm severity of an alarm group to a channel

The latter is at the moment used for alarm overview panels,
but we'll move to dedicated EPICS databases calculating sum-alarms
for those panels, to avoid unnessesary interdependencies in our high
level application (E.g. what happens if two alarmhandlers are running with
slightly different configurations?)

Kate Feng wrote:

> "Ned D. Arnold" wrote:
>
> >
> > One feature of ALH is that it can write the severity of an alarm group
> > to a specified PV. We intend to use this capability to feed "soft" PVs
> > that are are used for the "comfort" display. The comfort display will be
> > a simple medm screen with red/green boxes on a dedicated monitor.
>
> I  guess the dedicated monitor is an X-terminal  instead of being
> controlled by an IOC. ???  Is the sound generated by the monitor
> lound enough to be herad in  your control enviorment.
>
> > A simple glance at the comfort display will direct the operators to the
> > appropriate alarm handler where they can find the many details
> > associated with the alarm.
> >
>
> Someone wants to be sound alerted  in the middle of the busy operation
> in case of emergency.
>
> >
> > This provides a very basic, always visible, comfort display by using
> > standard EPICS tools. The hierarchical approach for alarms built into
> > alh is helpful in managing the thousands of signals that are monitored
> > and grouping them down to about two dozen top-level groups.
> >
>
> I agree so.   I am looking for basic  and  fast solutions.
>
> Thanks,
> Kate

--
I prefer the most unjust peace to the most righteous war.
        -- Cicero

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System