Re: [foxboro] Alarm Priorities

The following is our alarm set-up in a nutshell (copied from an intranet
page). It's been in use for as long as we have had our I/A system here at
the Carrollton site (14 years), and it's served us well. YMMV.

Hope this helps.

Process alarms are classified into 5 distinct priority levels. Urgency 
of alarms decreases as priority level increases. Level 1 and 2 alarms 
will sound the horn and send a message to the configured alarm historian 
and printer. Level 3 and 4 will sound the horn and send a message to the 
configured alarm historian but not the printer. Level 5 will not sound a 
horn or send an alarm message to a printer but will send an alarm message 
to the configured alarm historian.

Priority  Description
   1      Priority 1 is the highest priority and is reserved for 
          emergency shutdown system alarms.
   2      This priority is reserved for SPAs, secured process alarms.
          (The alarms are "secured" by the use of additional REALM 
          blocks and an access scheme based on access classes. An SPA 
          cannot be changed by the operators in the operators' 
          environments.)
   3      Not Used
   4      This priority level is reserved for Operator Settable Alarms 
          (anything else that's not an SPA above).
   5      This priority level is for FBM device and channel status, 
          and out-of-range values.

Duc

-- 
Duc M. Do
Dow Corning Corp.
Carrollton Plant
Carrollton, KY, US


-----Original Message-----
From: Steve Elwart [mailto:steve.elwart@xxxxxxxxx]
Sent: Wednesday, May 15, 2002 8:26 PM
To: foxboro@xxxxxxxxxxxxx
Subject: [foxboro] Alarm Priorities

We are in the process of taking another look at our alarm priorities.

What is the experience out there with priorities?  What have you set up as
the levels?  What do each mean?

thanks!

Steven P. Elwart, P.E
Director of Systems Engineering
Ergon Refining, Inc.
2611 Haining Road
Vicksburg, MS 39180-0309
601-638-4960 (O)
601-630-8311 (FAX)

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