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42
BM 25A/AW
Instruction Manual
Self-healing
NOTE
:
This section covers the ‘
BM 25
’ mode only.
Each BM 25AW broadcasts a message every 10 seconds. Using the example shown
below, if BM 25AW tag A receives no message from BM 25AW 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 25AWs on the network.
Note that BM 25AW tag B can act the same if it receives no information from A.
Number of BM 25AWs that do not communicate anymore is displayed on each BM
25AW referring a communication fault. This number may differ depending on the BM
25AW you are looking. Here below, one BM 25AW out of four is no longer
communicating.
Figure 28 : One BM 25AW 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 25AW 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.
Summary of Contents for BM 25A/AW
Page 1: ...BM 25A AW Area Gas Monitor Part Number NP25AEN Version C 4 User Manual ...
Page 10: ...10 BM 25A AW Instruction Manual Product Overview Figure 2 Product Overview ...
Page 18: ...18 BM 25A AW Instruction Manual ...
Page 34: ...34 BM 25A AW Instruction Manual ...
Page 70: ...70 BM 25A AW Instruction Manual ...
Page 75: ...9 Special Instructions 75 CSA Control Drawing for BM 25A AW Connections ...
Page 78: ...78 BM 25A AW Instruction Manual ...