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6 M-Bus communication
M-Bus communication is half duplex allowing two-way communication with one M-Bus slave at a time.
The master's integrated port controller makes sure that communication is only possible on one serial port at a time.
6.1
Communication speed
M-Bus Master MultiPort 250D supports the following communication speeds:
• 300 baud 8E1
• 2400 baud 8E1
• 9600 baud 8E1 (not via GPRS)
6.2 Transparent reading
MultiPort 250D is equipped with the following communication possibilities for reading from e.g. remote reading
systems, control systems and various controllers with M-Bus interface:
• USB
• RS-232
• RS-485
• Optical eye
• GSM/GPRS (optional equipment).
Communication through the above-mentioned ports is transparent and includes collision detection.
7
Operation of M-Bus Master MultiPort 250D
The master can be operated by
means of its display and six keys.
Kamstrup A/S • 5512853_C1_GB_01.2017
Left function key
Down
Back
M-Bus Master MultiPort 250D
Right function key
Up
OK
25
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