Schneider Electric Modbus Plus Network Bridge Multiplexer none - Manual (Page 105)

Glossary 95 31007492
peer-to-peer communication
A communication between networked devices in which any device
can initiate data transfer. The method used by devices conforming
to the OSI Model. Also the method used on Modbus Plus.
Physical Layer
In the OSI model, the layer that provides the physical connection
and signalling means between nodes of a network. Defined by the
IEEE 802.4 standard.
port
The external connector on a device at which the network cable is
attached.
protocol
A set of rules used mutually by two or more devices to
communicate.
Repeater
A Modicon device that interconnects two sections of a Modbus Plus
network.
routing path
In Modbus Plus, the sequence of device node addresses through
which a message will be routed to its final destination.
routing path field
In a Modbus Plus message frame, a group of five bytes that specify
the addresses of the devices in the message routing path.
RS232
An EIA standard that defines signal requirements and cable
connections for serial data communications, characterized by single
wires for transmitted data and received data.
RS485
An EIA standard that defines signal requirements and cable
connections for serial data communications, characterized by a
balanced pair of wires for both transmitted and received data.
section
A contiguous grouping of cable segments, together with their node
devices, connected directly to form a signal path that does not pass
through any Repeater. The minimum length of a section can be
10āāft (3āām), the same as one segment. The maximum length can be
1500 ft (450 m). One section supports up to 32 nodes.