Campbell RF410 Manuel d'instructions télécharger pdf (Page 38)

PakBus Networking Guide

For example - the Quick Start network in Section 1:

Number of nodes = 4 (LoggerNet is one node) CR10XPB memory usage = 64 bytes

Number of neighbors to the CR10XPB router = 3CR10XPB memory usage = 24 bytes

Number of routers = 2 (counting LoggerNet) CR10XPB memory usage = 4 bytes

4.1.2.2 *D17 View Routing Table

01 :xxxx PakBus Address of destination node

01 :yyyy via neighbor (router) with PakBus Address yyyy

(yyyy is present only if a router is needed to access xxxx)

01 :zzzz worst case response time in seconds (hop metric)

02 :xxxx PakBus Address of destination node

02 :yyyy via neighbor (router) with PakBus Address yyyy

02 :zzzz worst case response time in seconds

...

0n :xxxx PakBus Address of destination node

0n :yyyy via neighbor (router) with PakBus Address yyyy

0n :zzzz worst case response time in seconds

A *D17 listing is added after 1 beacon response, held at least 1 beacon interval,

and dropped ≈ 20 secs after no beacon response.

A *D17 listing is added after one hello response, held for at least 2.5 × the

comms verification interval, and dropped if no response.

A “neighbor” is indicated in a *D17 Routing Table by a single PakBus Address

in that window number. For example, if device 0003 is a neighbor to a

datalogger, the datalogger’s routing table will look like this:

01: 0003 PakBus Address of destination node

01: 1.0000 worst case response time in seconds

The *D17 listing will change once the datalogger discovers a change in the

neighbor list of any router in the network (including itself) that results in a

change in the best routes to the nodes in the network. *D17 shows the current

"best" routes; it does not show all routes even though the datalogger has access

to all possible routes to any given node. If a router's neighbor list changes, all

routers are notified and will recalculate their "best route" routing table based on

the new information.

Although *D17 shows neighbors, in the case of multiple peripherals it does not

show the ports you use to access the respective neighbors.

The P199 instruction copies the *D17 Routing Table to a block of Input

Locations for transfer to another PakBus device.

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Campbell RF410 Manuel d'instructions Page 38