Rockwell Automation 1747-ACNR15 ControlNet Adapter Module User Manual - Manual (Page 135)

1 Publication 1747-UM003A-EN-P
Glossary
The following list defines common terms used in this manual.
Complementary Module - A module that performs an opposite function; an
input module complements an output module and vice versa
Configuration Manager node - The node responsible for distributing
ControlNet configuration data to all nodes on the network
ControlNet network - A communication architecture that allows the
exchange of messages between Allen-Bradley products and certified
third-party products.
ControlNet status indicators - Channel A and channel B indicators on your
node indicating status on the ControlNet link.
Drop cable - A cable that connects a node to the trunkline (this is an integral
part of 1786 taps).
Frame - A single data transfer on a ControlNet link
Link - A collection of nodes with unique addresses (in the range of 1-99).
Segments connected by repeaters make up a link; links connected by routers
make up a network.
NAP (Programming Terminal Port) - Network access port - a port that
provides a temporary network connection through an RJ-45 connector. A
single bidirectional electrical interface programming channel is provided on all
ControlNet nodes usable in both redundant and non-redundant connections,
but is not available on nodes acting as repeaters.
Network - A series of nodes connected by some type of communication
medium. The connection paths between any pair of nodes can include
repeaters, routers, bridges, and gateways.
Network address - A node’s address on the network.
Node - The port of a physical device connecting to the network which
requires a network address in order to function on the network - a link may
contain a maximum of 99 nodes.
NUT - Network update time - the repetitive time interval in which data can be
sent on the ControlNet link.
Processor - A term used to mean an Allen-Bradley programmable controller.
Redundant media - Using dual cables to receive the best signal over a
network.
Repeater - A two-port active physical-layer device that reconstructs and
retransmits all traffic it hears on one segment to another segment.