User Manual

30
Other communication
standards
Modbus
Modbus is an open, widely used stan-
dard employed in many areas of appli-
cation such as industry, buildings as
well as the transport and energy
sectors. The Modbus protocol is used
to establish master-slave/client-server
communication between intelligent devices. Via Modbus,
a master, for example an automation station, and multiple
slaves, such as refrigeration machines, can be connected.
The data is transmitted via one of the three operating
modes: Modbus ASCII, RTU or TCP. Please find more
information at: modbus.org
M-Bus
M-Bus (Meter-Bus) is a European
standard for remote meter reading,
and can be used for various types of
consumption meters as well as various
valves and actuators. Data, such as heat
quantities, can be read electronically.
This data is transmitted serially via a reverse-polarity-