Re: alarm handler confusion (and solution)

[Janet Anderson <jba@aps.anl.gov>]

Maren Purves wrote:

> Question: I put
> alh -filter a -s <config file>
> and it runs without beeping ok. The way I understand the documentation
> the "- filter a" should make the blinking of alarms go away when
> the alarms are no longer active. Am I understanding this wrong or
> did I write the command line wrong? This would be nice to have
> because we run several alarm handlers and it would be nice to just
> look at one screen and know if there are alarms that are still
> active.

With the command line option "-filter a", alh will initially display only alarm
channels (database records) having active alarms.  An alarm channel having an
active alarm is either currently in an alarm state (alarm severity greater than
zero) or has an outstanding unacknowledged alarm.  After the initial display of
only channels with active alarms, new channels with alarms that become
active will appear on the display but channels already displayed will not be
removed when their alarms become inactive. It was decided that alh users would
not want alarm groups and channels jumping around on alh displays when one or
more channels go quickly into and out of active alarm state. Alh displays
can be updated to show only channels currently in active alarm state by
selecting the "Setup/Display Filter/Active Alarms Only" menu item.


Janet