Echelon IzoT Commissioning Tool - Manual (Page 21)

IzoT Commissioning Tool Network Designs
An IzoT Commissioning Tool Network Design consists of an OpenLNS network database and an
OpenLNS CT drawing.
OpenLNS Network Database
An OpenLNS network database contains definitions of the devices contained within a L ON W ORKS
network and an OpenLNS CT drawing, including information such as the name, address, application
configuration, and network connections for each device. Whenever you change an OpenLNS CT
drawing, IzoT Commissioning Tool automatically uses OpenLNS services to update the information in
the OpenLNS network database associated with the OpenLNS CT drawing.
Every OpenLNS CT drawing is associated with an OpenLNS network database, and the OpenLNS
network database is always located on the computer with the OpenLNS Server. The OpenLNS Server
may be located on the same computer as IzoT Commissioning Tool, or it may be located on a different
computer. You can maintain backup copies of the Izot Commisioning Tool network database, and you
can move the OpenLNS Server and OpenLNS network database to a backup computer. See Backing
Up an OpenLNS CT Network Design in Chapter 7, Maintaining Networks, for more information.
OpenLNS CT Drawing
An OpenLNS CT drawing contains the graphical representation of the L ON W ORKS network. An
OpenLNS CT drawing consists of one or more drawing files, and the drawing files consist of one or
more pages that each represent a subsystem. One drawing file is designated as the top-level drawing
file; this drawing file is the one created when you create a new OpenLNS CT network design. A
subsystem within the top-level drawing file is designated as the top-level subsystem; this subsystem is
represented by the first page of the drawing that you create when you create a new OpenLNS CT
network design.
An OpenLNS CT drawing is always located on the computer running OpenLNS CT or on a remote file
share. When multiple OpenLNS CT users are accessing the same OpenLNS CT drawing, OpenLNS
CT automatically keeps the drawing synchronized. Multiple-user operation is described in Automatic
OpenLNS CT Drawing Synchronization in Chapter 7.
L
ON
W
ORKS
Basics
This section provides an overview of L ON W ORKS networks and defines related terms. The Glossary in
Appendix B provides a quick reference for specific terms.
Networks
A L ON W ORKS network consists of intelligent devices (such as sensors, actuators, and controllers) that
communicate with each other using a common protocol over one or more channels. Network devices
are sometimes called nodes.
Devices
Each device includes one or more processors and a transceiver. The processor(s) provide the device’s
intelligence and implement the ISO/IEC
14908-1 Control Network Protocol (CNP). The transceiver
serves as the device’s electrical interface to the communications channel.
Protocol
A device publishes and consumes information as instructed by the application that it is running. The
applications on different devices are not synchronized, and it is possible that multiple devices may all
IzoT Commissioning Tool User’s Guide 5