Echelon LonWorks Router - Manual (Page 104)

Introduction
To install a L ON W ORKS router, perform the following steps:
1. Define a network topology.
2. Physically attach the router to a L
ON W ORKS network.
3. Connect power to the router.
4. Logically install the router on the network.
5. Test the router installation.
The following sections describe these steps in more detail.
Defining a Network Topology
There are many possible network topologies when using routers. The first rule
for initial integration is that if a network management tool is used for
installation, then a physical or logical path must exist between the network
management tool and the router targeted for installation:
• A physical path is created if the network management tool is connected to
the same media as one side of the L ON W ORKS router.
• A logical path is created if one or more active installed routers exist
between the L
ON
W
ORKS
router and the network management tool.
The routers creating the logical path can be L
ON
W
ORKS
routers, custom routers
based on the RTR-10 Router Core Module, or custom routers based on a Series
5000 router. The routers in the logical path must be installed, loaded, and online
before you can add the new router to the network.
When installing routers on a development network, you can use the
LonScanner™ Protocol Analyzer to verify that a path exists to a router to be
installed. To verify the existence of a logical path, press the service switch of a
powered router. If a physical or logical path to the protocol analyzer exists, this
action increments the packets received count. A detailed view of the packet log
resulting from the previous action should show a code of 0x7F, the message code
for an unsolicited service pin message.
Attaching the Router to a Network
The next step in installation is to physically attach the router to two channels in
a L ON W ORKS network. It is important to insure that each channel has only one
transceiver type attached to it. Mixing signals from different transceivers
defeats the collision avoidance algorithms, and therefore severely degrades
network performance.
The wire used for the network affects the overall system performance with
respect to distance, stub length, and total number of devices supported for a
single channel. See the Junction Box and Wiring Guidelines for Twisted Pair
L ON W ORKS Networks engineering bulletin (005-0023-01) for information about
supported cable and wire types for each type of twisted-pair channel.
94 Installing a LONWORKS Router