User Manual

7
Siemens Building Technologies
Cerberus Division
e1143b
06.2000
control panel. This operation, that cancels pending alarms is a very sensitive one and
must be performed by specially trained personnel.
2.3 Data representation
Each physical device connected to the Cerberus or FSS control panel has a finite set of
states. These states, such as normal operation, alarm, fault and so on, are modeled
and internally reproduced by the monitoring software.
2.3.1 Security points
The way LMS manages the security events is based on the use of a number of tables.
The tables connect each physical event (e.g. the door opening signaled by a magnetic
contact) with a logical description of such an event (the place in which the event took
place, the type of description to be associated to it and how the event has to be man-
aged by LMS itself). This procedure, summarized in Fig. 6, is specific to LMS. Only the
outputs of the procedure are significant for the integrated system.
Inside LMS each possible source of information installed in the field (such as a smoke
detector, a magnetic contact or a microwave intrusion detection sensor) is modeled as
a point. Up to 16 different numerical values can be associated to each point and each
value corresponds to a state. A table, called Treatment Table, lets the operator config-
ure the type of event associated to a specific value.