26 M-Bus support Page 123 of 142
MCS301 meter - product Manual 1.25 MetCom Solutions GmbH
26.7 M-Bus installation
M-Bus installation process can be activated by 3 different actions:
• locally or remotely using a communication interface (remark: only devices with primary
address can be installed in that mode)
• pressing the Reset button, while the meter is in the “Reset mode”
• after power up of the meter.
After activation of the installation procedure the E-meter scans for physically connected M-Bus
devices for addresses from 1 to 4, and then also for address 0. After the M-Bus device is
registered in the MCS301 meter the regular communications can begin.
26.7.1 Scan for M-Bus devices
The MCS301 meter manages a list of connected devices and their addresses. The list can hold
4 M-Bus devices. During installation, the MCS301 will scan for devices on the wired M-Bus. All
responding devices will be registered in the list. Two different methods are supported to
discover M-Bus devices connected to the MCS301 meter:
• Poll for device with address 0,
• Poll for devices with unregistered address.
Poll for M-Bus devices with Address 0
The address 0 is reserved for unconfigured M-Bus devices. Each unconfigured M-Bus device
shall accept and answer all communication to this address. The MCS301 meter will select an
unused device address and set M-Bus device address to it. Following this procedure the e-
meter will request M-Bus data, set event “New M-Bus device installed ch x [1]” and raise alarm
“M-Bus device installed ch x”.
Poll for Devices with Unregistered Address
The Poll method is based on the procedure according EN 13757-3 (chapter 11.5.1). In case at
least one channel is still empty, the E-meter scans for unused M-Bus addresses in the range
from 1-4 and assigns the new address to the free channel of the E-meter.
26.7.2 M-Bus installation Flag
In case at least 1 (out of the maximum of 4 M-Bus) meter is successfully connected to the
MCS301 meter an arrow on the meter LCD, marked with “M”, is displayed.
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