Echelon Lumewave CRD 3000 Street Light Bridge - Manual (Page 50)

40 Planning for the Street Lighting Solution
module in the entire street lighting network. The Segment Controller discovers
and commissions nearby devices first, then discovers additional devices through
the Street Light Bridge or luminaire repeaters, and then commissions them.
Thus, the discovery and commissioning process is iterative, and could take some
time to complete. The process also depends on your having installed Street Light
Bridge or luminaire repeaters in appropriate positions within the network.
Both installation methods are supported, and both work well in most cases. The
first method is recommended for new installations because it allows you to create
and document the network as you install it. For either installation method, you
can manually commission any device within the network if you have the device’s
Neuron ID.
Defining Repeating
The main purpose of a CRD 3000 Street Light Bridge module is to act as a
repeater for power line communications, for RF communications, or for both. By
repeating the communications packets, the CRD 3000 Street Light Bridge
module can extend the overall range of the street lighting network, or it can
bypass obstacles that could otherwise restrict communications within the
network.
What kind of repeater the Street Light Bridge becomes depends on the value of
the nciRepeatMode data point:
• If nciRepeatMode is 0, proxy requests received on the power line
channel are repeated onto the RF channel. This is the default value.
• If nciRepeatMode is 1, no packets are sent on the RF channel (that is,
the CRD 3000 Street Light Bridge module acts as a power line repeater
only).
• If nciRepeatMode is 2, no packets are sent on the power line channel
(that is, the CRD 3000 Street Light Bridge module acts as an RF repeater
only).
Regardless of the CRD 3000 Street Light Bridge module’s repeating mode, when
it receives a message that requires a response, an acknowledgement, or a
challenge, the CRD 3000 Street Light Bridge module sends that response,
acknowledgement, or challenge on the channel on which the original message
was received.
PL/RF Repeater
In normal mode, the CRD 3000 Street Light Bridge module serves both power
line and RF channels according to the following rules:
• When receiving a message, the CRD 3000 Street Light Bridge module
replies only on the channel on which the message was received (PL or
RF). In this case, “reply” means response, acknowledgement, or
challenge.
• When receiving a proxy request, the CRD 3000 Street Light Bridge
module forwards the request to both the RF and PL channels.
A CRD 3000 Street Light Bridge module does not repeat a packet onto the RF
channel unless it receives a request from the Segment Controller to repeat.