Echelon LNS DDE Server - Manual (Page 68)

Device Dev
Devices. Used to access a device’s or router’s
properties. See Chapter 8 for more information.
System System System properties. For the System type no subsystem
is specified. See Chapter 8 for more information.
Topic Types and the Folder Pane
The example folder pane on the right illustrates
how topic types are displayed by the LNS DDE
Server.
In the folder pane, a tree is displayed with the
LNS DDE Server at the root, networks as
branches off the LNS DDE Server, subsystems as
branches off the networks, and devices as
branches off the subsystems.
For example, the branches immediately below the
Subsystem 1 subsystem in the example folder
pane are the devices in Subsystem 1. Below each
device is a set of type folders that contain the
Network Variables, Configuration Properties, and
L
ON M ARK Objects in the device.
Hierarchy
The folder pane displays the hierarchy of devices,
L
ON M ARK objects, network variables, and
configuration properties. A L ON M ARK object is
contained within a device. Network variables can
be associated with a L
ON M ARK object or with a
device as a whole, so network variables can exist
on the same level as L
ON M ARK objects in the
hierarchy, or one level below L ON M ARK objects.
Configuration properties can be associated with
network variables, L
ON M ARK objects, or devices.
Therefore, configuration properties can be on the
same level of the hierarchy as L ON M ARK objects
or network variables, or they can be on the level
below network variables.
When type folders are contained inside other type
folders, specify the topic type by concatenating
the names of the types.
4-6 Topics and Items