Siemeca AMR ⢠Network Node WTT16/WTX16 M-Bus ... - Armatec AB
Siemeca AMR ⢠Network Node WTT16/WTX16 M-Bus ... - Armatec AB
Siemeca AMR ⢠Network Node WTT16/WTX16 M-Bus ... - Armatec AB
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Extended<br />
Secondary<br />
Addressing<br />
If the device identification is subsequently changed (e.g., when a<br />
radio pulse adaptor for water meters is retrofitted), <strong>Siemeca</strong> devices<br />
will automatically and additionally broadcast a fabrication number.<br />
The fabrication number is a copy of the original device ID. It prevents<br />
any address conflict from occurring on the M-bus (and on the radio<br />
channel), even if the same device ID has inadvertently been<br />
programmed in two different devices. The master has to use<br />
extended selection for that purpose.<br />
However, if a meter is simultaneously registered in two networks or<br />
two network nodes from one network are connected to the M-bus,<br />
there will still be a collision, even if extended selection (without wild<br />
cards) is used. The reason for such a collision is that the meter is<br />
simulated on the M-bus by two network nodes. Thus, the same<br />
device address does, indeed, exist twice on the M-bus.<br />
20/56 For intra-company use only<br />
Siemens<br />
Netzwerkknoten <strong>WTT16</strong>/<strong>WTX16</strong><br />
Building Technologies The <strong>Network</strong> <strong>Node</strong> 09.03.2007
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