Elpro Technologies 915U-2 User Manual page 64

915U-2 Wireless I/O
Enable Multipath
RSSI Algorithm
Route Request Idle
Time (Sec)
Route Threshold
(Hops)
Route Refresh (Sec)
Route Timeout (Sec)
Save Changes and
Activate.
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Multipath RSSI algorithm should be enabled when the installation
is in an environment that is known to have multipath fading.
These installations are typically where units are installed inside
buildings or in environment where antenna do not have
uninterrupted line of sight or have large metallic objects that are
close to the antennas.
The multipath RSSI algorithm calculates a path RSSI that will be
used when establishing mesh links between neighbours. The
calculated link RSSI is compared to the configured RSSI
threshold. If the calculated RSSI is stronger than the threshold,
then a link will be established.
Route Request Idle Time - is the time the module will wait or hold
off between route requests messages if the route request fails to
get through to the destination. The default time is 30 seconds
which means if the module fails to communicate to its destination
it will wait 30 seconds before sending out another route request.
Without this wait time a network could easily get swamped with
route requests when a link fails to get through.
Route Threshold - Configures the number of additional hops that
the unit reports when replying to mesh routing requests.
Can be used to configure a priority when a module is used as a
repeater. E.g. two repeater modules lay between a destination
and the source, the repeater with the lowest Route Threshold will
be used first.
The default value is 0 which will mean the module will always act
as repeater. Values between 1 and 9 will configure a priority,
higher numbers for units that are less preferred as repeaters.
Setting the parameter to 10 will means the unit will never be used
as a repeater.
Route Refresh - is how often the module will try to find a better
(shorter) route for an existing route. This is used where network
topology changes can occur that could potentially allow a shorter
path to be taken, i.e. a roaming or mobile application. Without
route refresh, the existing route which may not be the best or
most reliable link would continue to be used. The default value is
300 seconds. Setting this parameter to zero will disable the route
refresh operation which will mean the existing route will never
refresh other than on module start up.
Route Timeout – is the time the route remains active from the
last time it was used. When the timeout expires, the route is
deleted from the unit which will mean the module will need to
rediscover what routes are available. Normally, this time should
be greater than the WIBMesh update time to a destination, so
that the routes will not time out, and remain active.
Save changes to non-volatile memory, and restarting the
function to load new configuration.
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User Manual