Modicon Modbus Plus Network Planning and Installation Guide

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Introducing the Modbus Plus Network Non-Linear Expansion You can connect RR85 repeaters to create multiple paths, so long as each section is run along a linear path (no branches to the cable). In effect, you can use RR85 repeaters to create the equivalent of star or tree configurations. This can be useful where a linear configuration may not be practical due to the layout of your plant facility. The figure below shows an example of non-linear network expansion using RR85 repeaters. This is a legal configuration because it satisfies the network requirements. � no more than 32 nodes are present on any single section. � each section is a linear cable path of 1500 ft (450 m) or less. � no more than three RR85 repeaters are present in the cable path between any pair of nodes. The figure below shows a non-linear expansion. 1500 ft cable max. 1500 ft cable max. ND = node device RR = repeater ND ND ND ND 38 890 USE 100 00 November 2004 RR RR RR ND ND RR 1500 ft cable max. 1500 ft cable max. ND ND ND ND ND ND ND ND 1500 ft cable max.
Joining Modbus Plus Networks How the Bridge Plus Operates Introducing the Modbus Plus Network The BP85 Bridge Plus device connects as a node on each of two Modbus Plus networks. The bridge operates as an independent node on each network, receiving and passing tokens according to each networkís address sequence. Bridge plus devices are not applicable to networks used for distributed I/O applications. The figure below shows three networks (A,B, and C) joined by a pair of bridge plus devices. The figure shows a single-cable network for simplicity. The bridge plus also supports dual-cable layouts. One bridge appears on network A at node address 22, and on network B at node 25. The other bridge is on network B at node 20, and on network C at node 20. network A node 22 node node node node 20 BP85 bridge plus node 20 network B network C node BP85 bridge plus node 25 Note: Each bridgeís two network addresses are entirely separate and can be set uniquely for each network. If a data message intended for a remote node is received at one of the bridgeís ports, the bridge stores the message and then forwards it to a node address on the next network as soon as it has received the token to transmit on that network. 890 USE 100 00 November 2004 39 node node node node node node
Page 1 and 2: 31003525.03 Modicon Modbus Plus Net
Page 3 and 4: Table of Contents Safety Informatio
Page 5 and 6: Chapter 7 Connecting a BP85 Bridge
Page 7 and 8: Important Information Safety Inform
Page 9 and 10: At a Glance About the Book Document
Page 11 and 12: At a Glance Introducing the Modbus
Page 13 and 14: Bridging Networks Introducing the M
Page 15 and 16: Introducing the Modbus Plus Network
Page 17 and 18: Overview of the Physical Network In
Page 21 and 22: Network Option Modules Introducing
Page 23 and 24: Terminal Block I/O (TIO) Modules In
Page 25 and 26: Typical Network Adapter Application
Page 29 and 30: Point to Point Message Transactions
Page 31 and 32: Designing for Process Speed Introdu
Page 33 and 34: Using Peer Cop Peer Cop Transaction
Page 35 and 36: A Peer Cop Example Other References
Page 37: Using RR85 Repeaters Expanding Dual
Page 41 and 42: Using the Bridge Plus Introducing t
Page 43 and 44: Modbus Configurations Introducing t
Page 45 and 46: RS232 and RS485 Configurations Intr
Page 47 and 48: At a Glance Elements of Network Pla
Page 49 and 50: Preparing a Network Plan Elements o
Page 51 and 52: Modbus Plus Drop Cables Elements of
Page 53 and 54: Adding Service Connectors Dual-Cabl
Page 55 and 56: At a Glance Estimating Network Perf
Page 57 and 58: Estimating Network Performance Esti
Page 59 and 60: Factors for Planning Estimating Net
Page 61 and 62: Factors That Affect Performance Han
Page 63 and 64: Communication Paths and Queuing Est
Page 65 and 66: Reading and Writing with the MSTR E
Page 67 and 68: A Sample MSTR Communication Estimat
Page 69 and 70: Getting and Clearing Statistics Loc
Page 71 and 72: Reading and Writing Global Data Pas
Page 73 and 74: Modbus Port Data Path Handling Unde
Page 75 and 76: Formula for Calculating Rotation Es
Page 77 and 78: Estimating Network Performance Guid
Page 79 and 80: Grouping Nodes Logically for Increa
Page 81 and 82: Estimating Specific Input and Speci
Page 83 and 84: Latency Formulas Estimating Network
Page 85 and 86: Estimating Network Performance Time
Page 87 and 88: Estimating Network Performance Time
Page 89 and 90:
Adding or Deleting Nodes Estimating
Page 91 and 92:
Guidelines for a Single Network Usi
Page 93 and 94:
Consistency in Node Addressing Remo
Page 95 and 96:
Guidelines for Multiple Networks Es
Page 97 and 98:
Using Multiple Bridges Between Netw
Page 99 and 100:
Estimating Network Performance The
Page 101 and 102:
At a Glance Documenting the Network
Page 103 and 104:
Worksheets for Network Planning Doc
Page 105 and 106:
Facility/Area: Network Number: Node
Page 107 and 108:
Documenting the Network Layout Use
Page 109 and 110:
Reviewing Your Topology Plan Docume
Page 111 and 112:
Facility/Area: Network Number: Cabl
Page 113 and 114:
Trunk Cables and Taps Documenting t
Page 115 and 116:
Cable Routing Worksheet Documenting
Page 117 and 118:
Facility/Area: Network Number 1 Cab
Page 119 and 120:
Documenting the Network Layout Netw
Page 121 and 122:
At a Glance Installing the Network
Page 123 and 124:
Tools and Test Equipment Required I
Page 125 and 126:
Routing the Cables Installing the N
Page 127 and 128:
Mounting the Taps Installing the Ne
Page 129 and 130:
Cable Entry and Jumpers (Taps at En
Page 131 and 132:
Connecting the Drop Cables Connecti
Page 133 and 134:
Grounding Installing the Network Ca
Page 135 and 136:
Checking the Cable Installation Ins
Page 137 and 138:
At a Glance Connecting an RR85 Repe
Page 139 and 140:
Mounting Dimensions Connecting an R
Page 141 and 142:
Connecting Power Connecting an RR85
Page 143 and 144:
Reading the Network Indicators Over
Page 145 and 146:
at a Glance Connecting a BP85 Bridg
Page 147 and 148:
Dimensions (Panel/Shelf Models) Ove
Page 149 and 150:
Setting the Modbus Plus Addresses C
Page 151 and 152:
Before You Apply Power Connecting a
Page 153 and 154:
Applying Power Connecting a BP85 Br
Page 155 and 156:
Connecting a BP85 Bridge Plus � T
Page 157 and 158:
BP85 Bridge Plus Specifications Ove
Page 159 and 160:
At a Glance Appendices Overview Thi
Page 161 and 162:
At a Glance Modbus Plus Transaction
Page 163 and 164:
SA85 and SM85 network adapters Tran
Page 165 and 166:
0.5 -1.5 transfer command to peer p
Page 167 and 168:
The Message Format ⎯ MAC Level Mo
Page 169 and 170:
LLC Fields The message contains the
Page 171 and 172:
At a Glance Message Routing Overvie
Page 173 and 174:
Bridge Multiplexers Message Routing
Page 175 and 176:
Controller Bridge Mode Routing Mess
Page 177 and 178:
Bridge Multiplexer Routing Modbus A
Page 179 and 180:
Routing Examples The figure below i
Page 181 and 182:
Message Routing If masters A, B, an
Page 183 and 184:
Using The Worksheets Planning Works
Page 185 and 186:
Notes: Below is the notes worksheet
Page 187 and 188:
Page 189 and 190:
Page 191 and 192:
Page 193 and 194:
Page 195 and 196:
At a Glance Installing Custom Cable
Page 197 and 198:
Tools and Test Equipment Required I
Page 199 and 200:
Routing the Cable Installing Custom
Page 201 and 202:
Installing Connectors on Dual-Cable
Page 203 and 204:
Installing Custom Cable Systems Bef
Page 205 and 206:
Determining the Wiring Direction Pl
Page 207 and 208:
Completing the Installation Follow
Page 209 and 210:
Installing Connectors without the T
Page 211 and 212:
Identifying the Terminals Installin
Page 213 and 214:
Installing Custom Cable Systems Not
Page 215 and 216:
Installing Custom Cable Systems Che
Page 217 and 218:
Labeling Installing Custom Cable Sy
Page 219 and 220:
A Glossary acknowledgment An LLC fr
Page 221 and 222:
Glossary DIO Distributed I/O. A Mod
Page 223 and 224:
L Glossary LAN Local area network.
Page 225 and 226:
peer-to-peer communication Glossary
Page 227 and 228:
Glossary transaction The complete a
Page 229 and 230:
Index A AC applying power, 153 AC/D
Page 231 and 232:
connector inline, 196 installing on
Page 233 and 234:
materials summary worksheet, 110, 1
Page 235 and 236:
on a Modbus Plus network, 12, 14, 1
Page 237 and 238:
selecting node address for best thr
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