Echelon LonMaker - Manual (Page 400)

384 Appendix G – Glossary
which case it is called a host-based device. A host-based device uses the Neuron Chip as a network
interface to talk to the L
ON W ORKS network.
Host Processor
The application processor for a host-based device. The host processor is typically a micro-controller,
microprocessor, or computer.
Host-Based Device
A device in which the device application program runs on a processor other than the Neuron Chip.
Hot Backup
A shadow copy of the LNS network database made while one or more LNS applications are accessing
it.
Hub
The center of a connection, which is specified by the device handle and network variable index (or
message tag index). Each connection is defined in terms of a hub and a set of targets. The hub must be
either the only input or the only output network variable (or message tag) in the connection. For
example, if the hub is an output network variable, all the other members in the connection must be
input network variables.
Human-Machine Interface (HMI)
A network management tool that provides services for human monitoring and supervisory control of
systems. The HMI usually runs on a workstation or desktop/portable computer.
i .LON IP-852 Router
An i .LON IP-852 router forwards ANSI/CEA-709.1 (EN14908) packets enveloped in ANSI/CEA-852
packets over an IP-852 channel. i .LON IP-852 routers include the i .LON 10 Ethernet Adapter,
i .LON e 3 100 Internet Server with IP-852 routing, i .LON 600 L ON W ORKS /IP Server, and the i .LON
1000 Internet Server.
IP
Acronym for Internet protocol, the basic programming foundation that carries computer messages
around the globe on the Internet. Sometimes called TCP/IP (Transmission Control Protocol/Internet
Protocol), even though ECP is a protocol that runs on top if IP, and IP supports other protocols besides
TCP.
IP-852 Channel
Also known as an ANSI/CEA-852 L ON W ORKS /IP channel, an IP-852 channel carries ANSI/CEA-
709.1 (EN14908) packets enveloped in ANSI/CEA-852 packets. An IP-852 channel is a L ON W ORKS
channel that uses a shared IP network to connect IP-852 devices and is defined by a group of IP
addresses. These IP addresses form virtual wires that connect IP-852 devices so they can communicate
with each other. IP-852 devices include the LNS Server computers, LonMaker computers, and
i .LON
IP-852 routers. An IP-852 channel enables a remote full client to connect directly to a L ON W ORKS
network and perform monitoring and control tasks.
IP-852 Network Interface
Formally called VNI, an IP-852 network interface enables IP-853 devices such as LNS Server
computers, LonMaker computers, and
i .LON IP-852 routers to be attached to IP-852 channels. An
IP-852 network interface requires that the LonWorks-IP Configuration Server be configured before
trying to communicate with remote devices or remote computers.
LAN
Local area network. A LAN is a communications network that links a number of different workstations
in the same area. The local Area may be defined as the same building or campus of buildings. Using