Re: [foxboro] alarm inhibiting vs. alarm disabling - process summary reporter

If you disable an alarm, the blocks behavior is identical to that of a
block for which the alarm was not configured. That is, disabling causes
the block to stop alarm detection AND notification.

If you inhibit an alarm, the block no longer notifies the rest of the
system of detected alarms of that type.

The "rest of the system" refers to the alarm destinations specified by
the alarm's alarm group parameter. These destinations are specified
block's compound's GRxDVy parameters or the alarm groups in the SYSTEM
block.

Note: I said the behavior is identical, but there is a difference. In
both cases, a message is sent to the alarm destinations telling them
that the alarm is disabled or inhibited. That's how the CAD knows to
change its display.


Regards,
=20
Alex Johnson
Invensys Systems, Inc.
10900 Equity Drive
Houston, TX 77041
713.329.8472 (voice)
713.329.1700 (fax)
713.329.1600 (switchboard)
alex.johnson@xxxxxxxxxxxxxxxx

-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
On Behalf Of Monte J Hansford
Sent: Thursday, December 14, 2006 10:43 AM
To: foxboro@xxxxxxxxxxxxx
Subject: [foxboro] alarm inhibiting vs. alarm disabling - process
summary reporter
Hi, I'm a relatively new Foxboro user, and I'm trying to customize a=20
report of inhibited alarms using the Process Summary Reporter and a
little=20
shell script.  I am a little confused about the difference between=20
'inhibiting' and 'disabling' alarms, which are two separate entries in=20
PSR.  'Alarms disabled' isn't described in the manual (B0193DG-E).
Am I right in thinking that 'disabling' refers to inhibiting alarms from

the block detail page, as opposed to inhibiting via the ICC?  When a=20
block's alarms are disabled, do they become 'inhibited' upon upload to
the=20
workfile?

Monte J. Hansford
MeadWestvaco, Kraft Division
Process Control & IS Group

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