Product manual

TAC Xenta Server – Gateway, Technical Manual B Protocols
Schneider Electric Buildings AB, June 2011 167 (184)
04-00124-06-en
B.7.2 M-Bus Metering Interface
The Meter Bus interface is added into the network pane of XBuilder, as
shown for a PW3 example network in the following screenshot.
Interface Properties
• Port Type – In most cases the RS-232 port option will be selected.
The RS-485 option should only be needed in the rare case of an
M-Bus adaptor using either RS-422 or RS-485.
• Baud Rate, Parity, #Data Bits, #Stop Bits – All the communica-
tion parameters, such as baud rate and parity, must be the same as
that of the target M-Bus serial adaptor.
• Poll interval (min) – Allows the required meter polling-rate to be
entered. The entered number should correspond to the number of
minutes between polling cycles (1 to 60). Because metered values
normally only change slowly, a fast poll cycle is generally not
required, although setting a 1 minute poll rate may be useful when
first commissioning a system to help detect problems. Once a sys-
tem has been successfully commissioned the poll rate should be
set to correspond to the fastest updating metered value of interest.
Note
• Some M-Bus systems include tampering detection that can be
activated by “excessive” polling. In such cases the use of the
Meter Bus interface may not be possible.