Campbell CR800 Dokumentacja Pobierz pdf (Strona 291)

Section 14. PakBus Networking

14-7

14.2.1 Router and Leaf-node Configuration

The arrangement of routers and leaf-nodes happens early in network planning.

The number of network routers can be from none to many extending from the

LoggerNet PC to the most remote stations. Routers can include a datalogger

and do measurements or employ an RF401 series stand-alone router to only

route packets for other dataloggers. Leaf-node devices can be added to any

router.

A leaf-node cannot route packets but can originate or destinate them. The

CR800 is a leaf-node by default. It becomes a router by setting IsRouter to “1”

or “True” (see 14.4 Settings Editors). The CR206 series are always leaf-nodes.

The network below contains 4 routers and 8 leaf-nodes. LoggerNet is always a

router and, as such, can route datalogger to datalogger communications.

14.2.2 PakBus Address Setup

Out-of-the-box CR800s have a PakBus address (PBA) of 1. For networks with

more than a handful of stations you should have a system of PBA assignment

to organize them and to guarantee unique PBAs. One approach is to assign

PBAs that are multiples of ten to routers and assign PBAs to their leaf-nodes

by filling those decades. The example below shows such a system:

CR800(12) CR206(21)

CR10XPB(11) CR510PB(31)

LoggerNet (4094)---------- CR800(10)-------------CR800(20)------------------ CR800(30)

router router router router

CR206(13)

CR206(22) CR206(23) CR510PB(32)

There are several Settings Editors, such as the Device Configuration Utility

and PakBus Graph that can modify a CR800’s PakBus address (see 14.4). Be

careful when editing a remote datalogger’s PakBus address. If you end up not

knowing what it changed to, you may need to direct connect to a PC running

the Device Configuration Utility in order to discover its PBA.

14.2.3 Neighbor Discovery Setup

PakBus network stations need to discover the links that will be needed for

communications between LoggerNet and the dataloggers or between

dataloggers. For example, in the Quick Start network CR800_10’s neighbor

filter established the link needed to communicate with CR800_20. LoggerNet

can discover an in-range node when you click on the Connect Screen Connect

button using static link information from a properly configured device map.

If you set LoggerNet and the network routers to beacon, neighbor discovery

happens automatically as all possible rf paths are discovered. However, some

of these paths may be unreliable, in which case they can be eliminated by

adding some neighbor filters and disabling some beacons. On the other hand,

you may find out by beaconing and pinging (see below) that a link you thought

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Campbell CR800 Dokumentacja Strona 291

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