Campbell CR800 Spécifications Page 303

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Section 14. PakBus Networking
14-19
14.3.10 LoggerNet and RF4xx Communications
Consider this example network. LoggerNet communicates via an RF4xx
cabled to a PC’s COM Port. CR800B is x miles from the PC.
LoggerNet~~~
x/2 miles~~~CR800A~~~x/2 miles~~~CR800B
RF4xx RF4xx RF4xx
FIGURE 14.3-2. Transparent Mode Comms
Let’s say we know, from testing with PakBusGraph Ping Node (14.2.3), that
the direct LoggerNet to CR800B link is unreliable, so intermediate CR800A is
placed to act as a router. If LoggerNet is beaconing, CR800B may eventually
hear one of LN’s beacons and successfully respond becoming a neighbor to
LN in spite of the router. To avoid this, disable LN beaconing and install a
neighbor filter in the router to discover the remote (configure Neighbors
Allowed SDC7 and Verify Interval SDC7).
Flat Device Map
It can be risky to configure ‘flat’ LoggerNet device maps in RF4xx networks.
Instead, use ‘tree’ shaped device maps which prevent LoggerNet from initially
creating, from the device map, a 1-hop but unreliable link to a distant node (see
Static Link and Dynamic Link in glossary).
ComPort_2
PakBusPort
CR800A
CR800B
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