Figure 21 : In the example above, BM 25W tag G communicates with E and F. In the event
of a loss of communication between G and F, E still ensures the communication to the
rest of the network. If G goes into gas alarm or fault condition, all BM 25Ws on the
network will report a corresponding alarm
Alarm sequence differs depending on whether a BM 25W sends information (gas alarm
or fault) or receives information (alarm transfer). This allows for quick identification of
the BM 25W in alarm condition so that the appropriate action can be taken. Although
there is no hierarchy in a mesh network, the unit in alarm and the unit reporting the
alarm are referred to later in the manual as 'main’ and ‘secondary’ BM 25W,
respectively.
Fault (no communication at
all, sensor fault, low battery,
etc.)
At least one BM 25W does
not communicate
Table 1 : ‘Alarm’ mode – Table of events
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