Operation Mode
Operator's Handbook, AutroSafe Interactive Fire Alarm System, Release 3, ASAFE-FO/FE Rev. E, 021105,
Autronica Fire and Security AS
Page 28
3.16.5 Delayed Coincidence Detection Zones
Detection zones configured as Delayed Coincidence Detection Zones
have the following properties:
In Day Mode (Immediate Output Actioning is disabled), outputs that
are configured to be activated by these detection zones will operate
according to their actual configuration, i.e. Silent Alarm, Small Alarm or
Large Alarm as follows:
When a fire alarm signal from the first detector in alarm is received,
the following will occur:
1. The detection zone will enter the Silent Alarm state, and all
FPE outputs configured to be activated on Silent Alarm will be
activated. The (T1) delay period will start.
2. When the T1 delay period expires, the detection zone will
enter the Small Alarm state. All FPE outputs configured to be
activated on Small Alarm will be activated. The (T2) delay
period will start.
3. When the T2 delay period expires, the detection zone will
enter the Large Alarm state. All FPE outputs configured to be
activated on Large Alarm will operate.
Note that, at any time, if an alarm from a second detector within the
same detection zone is received, the detection zone will always enter
the Large Alarm State. This will mean that all (not yet activated) FPE's
configured to be activated on Silent, Small and Large Alarm will be
activated.
Pressing the reset button during a delay period will terminate the delay
period (T1 or T2).
In Night Mode (Immediate Output Actioning is enabled), outputs are
always activated on the first detector in alarm and the system will
always enter the Large Alarm state. As with Day Mode this will mean
that all (not yet activated) FPE's configured to be activated on Silent,
Small and Large Alarm will operate.
In an alarm situation, the actioning of outputs will behave as described
above, provided that;
• the detection zone has been defined as a Delayed Coincidence
detection zone (configurable)
and
• the point(s) in this Delayed Action detection zone has been set to
point delay ON (the default configuration)
Note that when a manual call-point (point delay OFF) is
activated, or when a Heat Detector (point delay OFF) sends an
alarm signal, a Delayed Coincidence detection zone will always
enter the Large Alarm state directly, regardless of Day or Night
Mode.
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