Re: [foxboro] Annuciator keyboard alternative

> What if you don't have an FBM close by?
>
> Brian


Hmmm... Creative Engineering 101.  ...

First, there is Russ's observation that the horn in a GCIO
could be used; it is the console horn.

Also possible would be that the "horns.cfg" could be set to 
specify some OM Global value (boolean or integer) as the 
"external horn". (The workstation doesn't know the difference 
twixt this and a block).  When an alarm comes to the workstation 
is will set that global variable.  If you were to hook up a unix 
script to run when that bit sets, it could write a 'wav' file 
to the audio output of the AW51, and  keep writing it until 
the bit is reset.

Reset of the bit can be achieved by picking the ALARM or PROC 
button on the display page (which calls up the Alarm Manager).

Now, there are a couple of ways to run a script on the change
of a global variable.  I prefer the little program which runs 
on the AW and connects to the OM variable awaiting a change,
then runs a script.  About a hundred years ago, I promised to
put this up somewhere and make it available for download.  Never
got around to it.  I can, however, send it on if you'd like. 
(and maybe get it up on a web page, too)

Regards,
William C. Ricker
FeedForward, Inc.
Marietta, GA, USA
wcricker@xxxxxxxxxxxxxxx
770-426-4422  


-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx
[mailto:foxboro-bounce@xxxxxxxxxxxxx]On Behalf Of William C. Ricker
Sent: Friday, September 17, 2004 3:02 PM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] Annuciator keyboard alternative


Well, now...

Look at file "/usr/fox/alarms/horn.cfg"

You can set up a horn thru a contact output.  The WP
will set the bit you specify here as an "External Horn".
You then need to find a way to clear it.  If you have an
annunciator panel, the point is cleared whenever you hit
one of the Ann Panel display keys, or the Alarm Silence
key.  I think it also clears when you hit the Alarm key
(to call up the alarm summary).

In the absence of a keyboard, and if you want a button for
the operators to hit, you could also hook a button to a
contact input and use a block to clear the horn output
whenever the button input is set.

Really easy, once you understand how the sets and clears work.

Regards,
William C. Ricker
FeedForward, Inc.
Marietta, GA, USA
wcricker@xxxxxxxxxxxxxxx
770-426-4422  


 
 
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