Product manual

B Protocols TAC Xenta Server – Gateway, Technical Manual
166 (184) Schneider Electric Buildings AB, June 2011
04-00124-06-en
B.7.1 M-Bus Metering Networks
Each M-Bus Network consists of a number of independent meters that
record data on behalf of a master metering application. Each meter may
capture and store a number of metered values such as power or water
consumption. The master application can then read each metered value
as required to record consumption for billing purposes, and so on. The
master application may also write configuration data to the meters as
part of its recording cycle, such as by changing storage intervals, setting
tariff patterns, and so on.
The SP9122 MBUS M-Bus Xenta 913 does not act as the master appli-
cation. Instead, it continuously polls the attached meters for their values
so that they may be utilized within a control system. However, a master
can also be connected to the M-Bus in which case the Xenta 913 will
simply hold-off polling whenever the master communicates on the net-
work
.
Note
• Currently the SP9122 MBUS Xenta 913 does not allow writing
to the M-Bus meters. This is to avoid the risk of losing vital
metering data due to incorrect usage or operation. However, the
Xenta 913 will attempt to cooperate with any separate master
application that connects to the M-Bus either permanently or
periodically.