User Manual

Page 21 of 90
CCT24
Data sent from the base radio in the central location will be routed down the “tree” to the intended node of
the network. Data from the nodes will be routed up the tree to the base or to another node in the system.
Note that it is possible to send data from one node to another node rather than sending it to the base.
A tree-routing system can operate in a polling mode where an application sends data requests to each of
the nodes as needed, or it can operate where devices attached to the node radios send data whenever
they have it to send. Additionally, the auto-report function of the CCT24 radio can be used to send data
through the tree on a timer or interrupt basis.
To set up the example system, all of the CCT24s, including the base, must be configured with the same
tree routing ID, and have tree routing option enabled. In addition, R2, R5, and R6 must be assigned
individual BaseModeNetID parameters, and then configured for router operation. The network IDs and
network addresses will be automatically assigned as the system forms. Figure 2.12.1.2 shows one way
that the network IDs and system addresses could be assigned.
Note that the routing nodes, R2, R5, and R6 have two network-related IDs - a ParentNetworkID and a
BaseModeNetID. The ParentNetworkID is used by a router to join the tree-routing system, and the Base-
ModeNetID is the ID the router uses to let other nodes join the system through it.
While the tree-routing system can form automatically, it is also possible to do additional node configura-
tion to control how the system forms. The following sections provide details of all the tree routing related
configuration commands plus details of the addressing used in a tree routing system.
Figure 2.12.1.2
Example CCT24 Tree Routing System