Echelon LonWorks Router Manuel d'utilisateur Page 12
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- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
Introduction
In general terms, a router is a device that forwards data packets between
communications networks. The router connects to the data lines from each
network, and reads address information in each data packet to determine the
packet’s destination.
A L
ONWORKS router connects two communications channels within a LONWORKS
network, and routes LonTalk messages between them. Using a L
ONWORKS
router supports the installation of small or large networks, with dozens to
thousands of nodes.
Figure 1 shows a typical router installation, with a free topology channel and a
78 kbps bus topology channel connected to a 1.25 Mbps backbone twisted pair
channel. Because the network includes the routers, applications on each of the
L
ONWORKS devices can communicate with each other transparently, as if they
were installed on a common channel.
L
ON
W
ORKS
Device 1
L
ON
W
ORKS
Device
2
L
ON
W
ORKS
Device 3
L
ON
W
ORKS
Device 4
TP/XF-1250 Backbone Channel
TP/FT-10 Channel TP/XF-78 Channel
TP/XF-1250
to
TP/FT-10
Router
TP/XF-1250
to
TP/XF-78
Router
Figure 1. Sample Router Installation
A single router can connect two channels, or multiple routers (called redundant
routers) can connect the same pair of channels. Redundant routers provide fault
tolerance by providing more than one routing path from one channel to another.
They are also required when not all devices on a given channel are able to hear
one another (referred to as an “ear shot problem”), for example on a radio
frequency channel. For a router to function as a redundant router, the router
must be configured to be a Configured router (see Router Types).
L
ONWORKS routers are used to:
• Extend the limits of a single channel. You can use a router to add a
channel to a L
ONWORKS network to support additional devices or to
extend the maximum channel length. You can add multiple routers,
depending on the capacity or distance needed.
• Interface different communications media, or bit rates, in a L
ONWORKS
network. For example, you might want to trade data rate for distance on
portions of the network, or to use a 1.25 Mbps backbone twisted pair
channel to connect several 78 kbps free topology and link power channels.
Alternatively, you might want to use power line for a portion of the
2 Introduction to LONWORKS Routers
- LONWORKS 1
- Router 1
- User’s Guide 1
- Welcome 3
- Audience 3
- Related Documentation 3
- Getting Support 4
- FCC Notice 5
- VDE Notice 5
- Canadian DoC Notice 5
- Table of Contents 7
- ONWORKS Routers 11
- LONWORKS Router Products 13
- RTR-10 Overview 14
- ONWORKS 15
- LonWorks Router Based on the 17
- Router 5000 17
- FT Router 5000 17
- ONWORKS router 18
- Router Types 19
- Repeater 19
- Configured Router 19
- Learning Router 20
- Channel A 23
- Router 1 Router 2 23
- Channel B 23
- Power Line Routers 23
- PL Phase A 24
- PL Phase B 24
- Message Receiving Side 25
- Message Sending Side 25
- Direction of Message Flow 25
- Router Performance 28
- LONWORKS Router Electrical 31
- Interfaces 31
- Overview 32
- Electrical Interface 32
- RTR-10 Electrical Interface 32
- ACLK2, BCLK1, and BCLK2 34
- ACP[4..0] and BCP[4..0] 34
- ASVC~ and BSVC~ 34
- AXID[4..0] and BXID[4..0] 34
- Note: RTR-10 Modules 36
- SERVICE~ 37
- Router 5000 Pinout 37
- FT Router 5000 Pinout 39
- Clock Pins (XIN and XOUT) 42
- CP[4..0] – Router 5000 Only 44
- IO[11..0] 46
- SCL, and SDA_CS1~) 47
- Power and Ground 47
- RX Activity Indicator 54
- TX Activity Indicator 54
- Power Requirements 55
- RTR-10 Power Requirements 55
- Low Voltage Protection 56
- LONWORKS Router Mechanical 59
- Developing a LONWORKS Router 65
- Using Custom Transceivers 68
- Differential Driver Circuit 71
- Comparator Circuit 72
- Using an EIA-485 Transceiver 74
- Using an FTT-10A Transceiver 75
- GROUND GUARD 77
- Input Output 89
- NodeBuilder Device Template 91
- Buffer Configurations 92
- Example Neuron C Source 93
- ONWORKS Router Design Issues 95
- PCB Layout Guidelines 96
- Power Supply 97
- Circuitry 97
- EMI Design Issues 99
- Compatibility) 99
- EMC Design Tips 99
- ESD Design Issues 100
- Installing a LONWORKS Router 103
- Introduction 104
- Defining a Network Topology 104
- Connecting Power 105
- Messages 106
- Testing Router Installation 107
- Network Management Messages 109
- Standard Messages 110
- Router-Specific Messages 111
- Set Router Mode 112
- Group Forward 113
- Subnet Forward 114
- Group No Forward 114
- Subnet No Forward 114
- Router Status 115
- Far Side Escape Code 116
- Set Routing Algorithm 116
- Set Buffer Size 116
- LONWORKS Routers 119
- Communications Parameters 120
- Determining RTR-10 Firmware 127
- Version 127
- Router Firmware Version 128
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