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PakBus Networking Guide

7.1.3 Leaf Node

A leaf node is a PakBus Device that cannot route packets. It can send and

receive packets only. The CR205 is always a leaf node.

By default, the CR10XPB, CR510PB and CR23XPB are configured as a leaf

node (not set up in *D15 as a router to forward packets toward other devices).

7.2 Packets

In a PakBus network, all communications take place via packet transfer. In

LoggerNet’s Status Monitor Low Level log you may see packets of two

protocols: PakCtrl (network layer) and BMP5 (application layer). The PakCtrl

packets handle low level network functions such as discovery and neighbor list

passing among routers. The BMP5 packets are used for higher level application

to application communications; for example, a BMP5 packet is used to send a

program or to collect data from a datalogger. Both types of packet appear in the

Status Monitor low level I/O log.

From the tables that follow, you can see that most packets occur in

command/response pairs. For example, the BMP5 Collect Data Command (09)

is sent to a datalogger. The datalogger responds by sending back Collect Data

Response (89) packets with table data encapsulated until all the data is

transferred to LoggerNet.

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Campbell RF410 Bedienerhandbuch Seite 54