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42
BM 25/25W
Instruction Manual
Self-healing
NOTE
: This section
covers the ‘
BM 25
’ mode only.
Each BM 25W broadcasts a message every 10 seconds. Using the example shown
below, if BM 25W tag A receives no message from BM 25W tag B for more than 2
minutes, then B is considered as missing by A which turns into fault mode (case No. 2
– Table of alarms) and transfers the information to all other BM 25Ws on the network.
Note that BM 25W tag B can act the same if it receives no information from A. Number
of BM 25Ws that do not communicate anymore is displayed on each BM 25W referring
a communication fault. This number may differ depending on the BM 25W you are
looking. Here below, one BM 25W out of four is no longer communicating.
Figure 28 : One BM 25W out of four does not communicate
In case of communication failure, the network tries to reestablish communication every
ten seconds.
In
BM 25
mode, if a BM 25W does not respond or if the network is split, then it is
possible to ignore this fault and to continue to work by the time of the restoration of the
network.
Содержание BM25
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