Emerson E2 Technical Bulletin

Clarification of the Operation of Alarm Annunciators in an E2 Control System
Document Part # 026-4214 Rev 1 08-JUN-2012 Page 4 of 8
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technical bulletin
The Annunciator Log
The annunciator keeps a log of all reported advisories from all E2s on the network, including
itself. This log is called the annunciator log, and it is always displayed on the annunciator E2
as its home screen. From the home screen of an E2 annunciator, a user may view information
about any advisory reported from any E2. The annunciator log also includes every alarm,
notice, and failure generated by the E2 annunciator unit
regardless of its own Annunc Prior-
ity filter value. The annunciator does not filter its own advisories when placing them in the
annunciator log  it always places them in the annunciator log.
The user may acknowledge, reset, or clear any advisory shown, and the requested action will
also be carried out on the E2 the advisory originated from. In other words, if a user clears an
advisory from the annunciator log that originated from E2 #3, the advisory will be cleared
from both the annunciator log and the advisory log of E2 #3.
The annunciator E2 has a special view that allows you to view only its own advisories, called
the advisory log. This log keeps all alarms, notices, and failures generated by the annunciator
E2s own subsystems. The advisory log has the same content as the annunciator log view,
except without all of the advisories reported from other devices.
The fact that the E2 annunciator unit has two different views for advisories can be a bit con-
fusing. A good rule of thumb to follow when viewing advisories on an annunciator is:
 If you want to see all the advisories for the site, press
 (HOME).
 If you just want to see advisories for the unit, press
 (ALARMS).
How Annunciators Gather Advisories
As mentioned previously, non-annunciators use the Annunc Priority filter to determine what
advisories get reported to the annunciator. The annunciators job is to listen on the network
for advisories that are being reported from non-annunciators. If the annunciator reads an
advisory from the network, it adds the advisory to the annunciator log.
If a non-annunciator reports an advisory to the annunciator and the annunciator is offline or
otherwise does not respond, the non-annunciator will continue to send the advisory report
three times, with a three-minute pause in between retries. After three unsuccessful retries
have been made, the advisory will not be reported again, and the annunciator log will never
show that advisory.
NOTE: A common mistake made by users is to press the button on an alarm annunciator whose
screen is in “sleep mode” and expect to see the annunciator log. Doing this will show only the unit’s ad-
visories, not the entire annunciator log. For annunciators, always press the key to awaken a box
from “sleep mode” and view the whole annunciator log.

Emerson E2 Specifications

General

Brand	Emerson
Model	E2
Category	Controller
Language	English