Master Control - Berker

4.2.4.12.4 Alarms
Activating and deactivating an alarm
If a detector within an armed area responds, or a sabotage detector triggers when armed or any
detector is found to be missing, the signalling system switches to the "Alarm" status and activates
the internal siren and, with additional external arming, also the visual alarm. For this, "1"
telegrams are transmitted to the bus using the corresponding 1 bit communication objects. In
addition, the panel transmits a "1" telegram via the "Alarm" object. This allows any switching
function to be executed in the bus. In addition, the signalling system uses the
14 byte object "Alarm detector text" to display the detector text of the detector which triggered
the alarm.
The internal siren is an alarm encoder activated for a set period of time. The system project
planner must set the switching length of the internal siren in the ETS plug-in. Switching times of
2 s to 255 s are possible. The signalling system automatically deactivates the internal siren
when the switching time after the alarm is triggered has elapsed. The visual alarm (e.g. a flashing
light on the exterior of the building) remains activated for the entire length of the alarm status
(see "Alarm acknowledgement" section below).
An alarm and the detector causing it are logged in the event memory of the panel (see chapter
4.2.4.12.6. Event memory).
An active alarm can be switched off by unarming on the panel or using a KNX/EIB switching
unit. In this case, the panel switches the internal siren off if it has not already been switched off
automatically after a period of time has elapsed, transmits a "0" telegram to the bus via the
"Alarm" object and switches to the status "Unarmed after alarm". The visual alarm (for external
alarming) remains switched on.
i In the case of an alarm, the panel can also send an e-mail with a predefined text, providing
that the Ethernet functionality of the panel is used and an e-mail mailbox was configured.
For this, the "Alarm" object of the signalling system can be linked to the
"Send e-mail" object of an event e-mail of the panel using an internal or external group address
(see chapter 4.2.4.13.1. Introduction).
Alarm delay / Prealarm
An alarm delay can optionally be configured for internal and external alarm. An alarm delay is
often used when the switching device (e.g. the panel or a button sensor) is installed in the secure
area of the building. In such cases, authorised people must be able to enter the secured
building area, meaning the status the switching device for unarming can only be reached after a
delay.
The alarm delay can be configured separately, using the parameter of the same name in the
ETS plug-in, for internal and external arming. Delay times of 0 s to 255 s can be configured. The
setting "0 s" (presetting) deactivates the alarm delay for the appropriate arming operation.
If an alarm delay time is running during system operation, a "Prealarm" can be activated first.
Depending on the parameter configuration, a prealarm is signalled by the piezo buzzer of the
panel and/or separate 1 bit communication objects. During a prealarm, an authorised person
can unarm the system without triggering a 'real' alarm. The transition to the "Alarm" status only
takes place is the system is not unarmed during the prealarm.
i A prealarm configured in the ETS plug-in only functions if an alarm delay time of more than
0 s has been configured. Otherwise the prealarm will not be executed during system operation.
i An alarm due to a triggered sabotage detector or a missing detector is always executed
without delay.
Order-No. 7574 00 1X
Software "...590101"
Functional description
Page 122 of 222