5.10
Operation of the WB169-RFG module
Receiving radio messages from surrounding radio modules and forwarding of the messages to the superior system
via Internet the WB169-RFG module performs fully automatically. Take into consideration that the broadcasting
systems according to the Wireless M-BUS standard has no protection against interference during transmission (a
signal collision, which occurs when two modules broadcast at the same time), so that temporary loss of data from
some modules can commonly occur in case of operating of a large number of modules in one radio network. These
losses can last for several hours or days.
The greatest risks of the signal losses from surrounding radio modules are commonly caused by human activities
within the installation. It is mainly about the following risks:
•
turning off the module power (e.g. circuit breaker failure or unintentional shutdown);
•
malfunction of the Internet connection caused by a local failure of the GSM network, or failure of the PPP
connection caused by incorrect functioning of the authorization servers or other devices of the GSM operator;
•
temporary or permanent shading of the antenna (e.g. due to building operations);
•
mechanical damage of the module, the antenna cable or the antenna when handling things at the installation
site.
To eliminate these risks, it is recommended to pay close attention to selection of the installation site and choice of
antenna and antenna location so that to find appropriate compromise between qualities of signal and the level of
risk of mechanical damage of the module or antenna. It is necessary to carry out the installation carefully with
using of high-quality cables and mounting components.
In case of loss of income data from large number (or all) reading modules, it is recommended to contact the
installation site caretaker and ask for the potential cause of the anomaly or perform the physical check on the
installation site.
WB169-RFG
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