Emerson E2 Manuel D’Utilisation

Apart from storing alarms it generates in its own 

Alarm Advisory Log, E2 can also report alarms it gener-
ates or receives in order to notify personnel. E2 can report 
alarms in several different ways.

 Alarms that occur within an E2 (or which are received 

by an Alarm Annunciator from another E2) may be 
reported to the header display at the top of the screen. 
When an alarm is reported to the display, the word 
“*ALARM*” flashes underneath the time at the top of the 
screen, allowing site managers or supervisors to see that 
one or more alarms are active for the E2.

Each E2 has a single digital output that reacts to alarm 

reports. An alarm can be reported to this output, in which 
case the output turns ON and remains on until the alarm 
condition has returned to normal.

Alarms may be sent to remote alarm receivers via the 

modem defined for the controller. Possible dial-out 
devices include a PC running UltraSite, a printer, a fax 
machine, and a digital pager. Dial-out sites are configured 
in Section 10.16.3.

If multiple E2s exist on a network, you may choose to 

send alarms from all E2s across the Echelon Network so 
that they may be picked up by the Alarm Annunciator. 

The Alarm Annunciator is the primary alarm reporting 

device in a multiple-device E2 Network. The Alarm 
Annunciator gathers all alarms posted by all devices on the 
Echelon Network, records them in its own advisory log, 
and applies its own set of alarm filters to determine if the 
alarms should be dialed out, reported to its display, or sent 
to its Advisory Output. 

There are several benefits to having an Alarm Annun-

ciator:

• An Alarm Annunciator makes it possible to handle 

all alarm dial-outs for all controllers with a single 
modem or network card.