26 M-Bus support Page 118 of 142
MCS301 meter - product Manual 1.25 MetCom Solutions GmbH
26 M-Bus support
26.1 General
The MCS301 meter supports wired M-Bus communication interface and functions as a
communication master, while other devices connected to the E-meter function as slaves.
The MCS301 meter allows a total maximum current consumption of up to 5 unit loads where
one unit load is defined as the maximum mark state current of 1.5 mA.
The data of the M-Bus devices are mapped to COSEM objects in the E-meter (According to EN
13757-3). The M-Bus devices are accessed via COSEM objects in the E-meter (not transparent
access through electricity meter). The required functions and data mapping model are defined
in this document. The physical interface for communication with gas/water meters is wired M-
Bus, but the provisions are provided to convert it to wireless (by using convertor/transceiver) in
wireless M-Bus applications.
Wired M-BUS definitions
• The format class FT1.2 of EN 60870-5-1 and the telegram structure is used
according to EN 60870-5-2.
• The wired M-Bus is based on the EN 13757-2 physical and link layer.
• The baud rate is 2400 b/s, E,8,1
Uniqueness of M-Bus device identification
According to EN 13757-3 the following 4 parameters are needed to guarantee uniqueness
of the M-Bus device identification:
• Fabrication Number (DIF/VIF);
• Manufacturer (header of M-Bus frame);
• Version (header of M-Bus frame);
• Medium (header of M-Bus frame).
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