25
Event sequence
register
The annunciator unit continually registers the
incoming events and the latest 9 events are
always stored in their chronological order in the
event sequence register from which they can be
read out from the digital display at any time.
The events are read out with the push-button
↑
,
which becomes accessible when the plastic lid
has been opened. Each time the
↑
push-button
is depressed, a new event is shown in the display
starting with the youngest event and ending up
with the oldest event after which the display is
turned off. The stepping through of the event
sequence register can be repeated if required.
The stepping through always proceeds in the
same direction.
IMPORTANT!
When the annunciator unit is turned into the
programming mode by the push-button
↑
, the
information in the event sequence register is
automatically erased. The information in the
event sequence register is also lost if the auxiliary
supply of the annunciator unit is interrupted.
However, the event register for the serial com-
munication will not been reset when the unit is
turned into programming mode only if the
auxiliary supply is interrupted.
Fig. 28. Principle of the event sequence register.
Chronological order
Decimal point indicates first-
out alarm after previous
acknowledge
Type of event
A = incoming alarm
- = disappering alarm
- - - - = acknowledge
Channel number
1...16
Channel 1
Channel 2
Channel 3
Channel 16
Event
register
Acknowledge
Digital display
Youngest event
The information of the event
register is read out with the
push button
