施耐德Modicon的MB 网络的计划与安装手册.pdf

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施耐德Modicon的MB 网络的计划与安装手册pdf,施耐德Modicon的MB 网络的计划与安装手册
Contents Chapter 1 Introducing the Modbus Plus Network 1·mm·m 1.1 Introducing the Modbus Plus Network.……2 1.1.1 Modbus Plus Applications 2 1.1.2 Extending the Network 2 1.1.3 Bridging Networks 2 1.1.4 Network Example 垂垂垂 3 1.2 Network Terminology 4 1.3 Overview of the Logical Network 6 1.4 Overview of the Physical network 1.5 Major Components of the Network 1.5.1 Programmable Controllers 1.5.2 Network Option modules 11 1.5. 3 DIO Drop Adapters................ 1.5.4 Available Backplanes for DIO Applications 3 1.5.5 Terminal Block Io(TIO) Modules...... 3 1.5.6 Network Adapters for Host Computers 14 1.5.7 BM85 Bridge Multiplexer 16 1.5.8 BP85 Bridge plus 1.5. 9 RR85 Repeate 1. 6 How Nodes access the Network 1.6.1 How Your application s Layout Affects Node Access 1.6.2 The Token Rotation Sequence 18 1.6.3 Point to Point Message Transactions 1.6.4 Global database Transactions 19 1.7 Error Checking and Recovery 21 1.8 Designing for Process Speed 22 1. 9 Designing for Deterministic IO Servicing 23 0 Using Peer Co 24 1. 10.1 Peer Cop Transactions 24 1.10.2 A Peer Cop example 26 Contents Chapter Introducing the Modbus Plus Network (Continued) 1.11 Expanding the Network · 28 1.11.1 Linear expansion 28 1.11.2 Using RR85 Repeaters 29 1. 11.3 Expanding dual-cable Networks 1. 11.4 Non Linear Expansion........ 1.12 Joining modbus Plus Networks 1.12.1 How the Bridge Plus Operates 1. 12.2 Using the Bridge Plus 34 1.13 Bridging Modbus Plus and Serial Devices 36 1.13.1 How the Bridge Multiplexer Operates......... 36 1. 13.2 Modbus Configurations.......... 36 1.13.3 Modbus Port mapping 37 1.13.4 RS232 and rs485 Configurations Contents 890UsE10000 Chapter 2 Elements of Network Planning ................. 41 2. 1 An Overview of Network Planning 2.1.1 Preparing a Network plan 2.2 Defining the Network Components 44 2. 2. 1 Modbus Plus Trunk cable 45 2.2.2 Modbus Plus Drop Cables......... 45 2.2.3 Modbus Plus Tap 2.2.4 Modbus Plus Cable Impedance Termination 46 2.2.5 Modbus Plus Network Grounding 47 2.3 Defining the Network Layout 2.3.1 Component Locations 48 2.3.2 Environmental requirements 2.3.3 Adding Service Connectors 49 2.3.4 Dual-Cable Length Consideratio 2.3.5 Estimating Cable Run Distances........... Contents Chapter 3 Estimating Network Performance ■■ 51 3.1 Overview .· 52 3.1.1 Your Network Performance Goal and Options 52 3.1.2 ign Options for IyO Servicing 53 3.2 Factors for Planning................ 54 3.2.1 Network Applications ·.··.·········· 54 3.2.2 Information Requirements 54 3.2.3 Transaction Requirements 55 3.3 How Devices interact on the network 3.4 Factors That Affect Performance 58 3.4.1 Handling Multiple Operations 58 3.4.2 Planning Your Application Program 3.5 Communication Paths and queueing 3.5.1 Path Typo 60 3.5.2 Path Quantities 61 3.5.3 Queueing 61 3.6 Reading and writing with the mstr 3.7 A Sample mstR communication 3.8 Getting and Clearing Statistics 3.8.1 al Device Stat 3.8.2 Remote Device Statistics 3.9 Reading and Writing Global dat 70 3.9. 1 Passing Global Data Between Nodes 70 3.10 Loading Effects in Your applicatio 3.10. 1 MSTR Data Path Handling under loading 3.10.2 Modbus Port Data Path Handling Under loading ... 73 3.10.3 Program Path Handling Under Loading 73 3.11 Predicting Token Rotation Time ····· 74 3.12 Formula for Calculating Token Rotation 76 3. 13 Predicting MSTR Response Time 78 3. 14 Estimating Throughput(With MstR)....... 82 3. 14.1 Grouping Nodes Logically for Increased Throughput 3.15 Estimating Throughput(With Peer Cop) 3.15.1 Estimating Total Communication Til 3. 15.2 Estimating Specific Input and Specific Output Times 85 3. 15.3 An Example of Peer Cop Performance 85 Contents 890UsE10000 3.16 Predicting Node Dropout Latency Time 3.16. 1 How the Network Handles Node Dropouts 86 3. 16.2 The Latency formula 86 3. 17 Estimating latency for a small Network 88 3. 18 Estimating Latency for a Large Network 90 3. 19 Planning for Ring Join Time 92 3. 19.1 Adding or Deleting Nodes 93 3.20 Precautions for Hot Standby layouts 94 3.21 Guidelines fora Single Network 3.21.1 Using MsTR Functions 3.21.2 USing Peer-to-Peer Communication Techniques 97 3.21.3 Using the Global Database 97 3.21. 4 Security Considerations in Node Addressing...... 98 3.21.5 Selecting Node Addresses for Best Throughput 98 3.21.6 Consistency in Node Addressing 99 3.21. 7 Remote Programming 99 3. 21.8 Controlling the Sequencing of MSTR Functions........ 100 321.10 Prioritizing and Compressing Data"∴… 3.21. 9 Optimizing Node Counts............... 100 100 3.21.11 Selecting Bridge Multiplexer Port Modes........ 101 3.22 Guidelinesfor MultipleNetworks 102 3.22.1 Bridge Communication Paths ....102 3.22.2 Using Multiple bridges Between Networks 104 3.23 Sample Communications Across Networks 106 3.24 A Summary of Network Planning 108 3.24.1 Analyzing Your Needs ..108 3.24.2 Finding Opportunities for Increasing Performance 108 89oUSE10000 Contents Chapter 4 Documenting the Network Layout ■■ ,,,,,,,,,,,,,,,,,111 4.1 Documenting Your Network Layout · 112 4.2 Worksheets for Network Planning 113 4.3 Defining Your Node requirements 114 4.4 Topology Planning Worksheet............ 4.5 Estimating Cable Lengths ·····..········ 118 4.6 Reviewing Your Topology Pl .,,119 4.7 Detailing the Network Layout 120 4.7.1 Overview of Your Detailed Planning Worksheets.... 120 4.8 Network Planning worksheet 122 4.9 Cable Routing Worksheet 125 4.10 Materials Summary Worksheet 128 Chapter 5 Installing the Network Cable 131 5.1 Overview of the Cable installation 132 5.2 Tools and Test Equipment Required 133 5.3 Before You start 134 5.4 Routing the cables 135 5.5 Mounting the Taps 137 5.6 Connecting the Trunk Cables ··· 138 5.6. 1 Cable Entry and Jumpers(Taps at Inline Sites).... 138 5.6.2 Cable Entry and Jumpers (Taps at End Sites) 5.6.3 Connecting the wires 139 5.7 Connecting the Drop Cable 140 5.7.1 Connecting the Signal Wires....... 140 5.7.2 Connecting the Outer Shield wire 141 5. 8 Grounding ...142 5. 9 Labeling 5.10 Checking the Cable Installation 144 5.10.1 Inspecting the Cable Installation 144 5. 10.2 Checking the Cable Continuity ..144 Contents 890UsE10000 Chapter 6 Connecting an RR85 Repeater ....... 147 6.1 Mounting Methods...... 148 6.1.1 Horizontal Mounting .,148 6.1.2 Vertical Mounting 148 6.2 Mounting Dimensions ...149 6.3 Installing the Repeater ·· .150 6.3. 1 Mounting the Repeater 150 6.3.2 Connecting Power 150 6.3.3 Connecting the Network Cables 151 6.4 Reading the Network Indicators 153 6.5 RRS5 Repeater Specifications.................. 154 Chapter 7 Connecting a BP85 Bridge Plus∴.∴ ■■■■■■■■■■ 155 7. 1 Mounting Methods 156 7.1.1 Horizontal or Vertical Mounting ..156 7. 1. 2 Rack Mounting .156 7. 1.3 Bridge Plus Models 157 7.2 Dimensions(Panel, Shelf Models) 158 7. 3 Dimensions Rack Mount Model 159 7.4 Setting the Modbus Plus Addresses 160 7.5 Connecting the Power Cables ∴...,162 7.5.1 Connecting AC Pow 16 7.5.2 Connecting DC Power ...162 7.5.3 Before You Apply power 163 7.6 Connecting the Network Cables.......... 164 7 Applying Power 165 7.8 Reading the Network Indicators ∴,,,,,,,,,166 7.9 Attaching Port Identification Labels 167 7.10 BP85 Bridge Plus Specifications 168 Contents Appendix A Modbus plus transaction Elements ,,,,,,,,,,,,,,,171 a. 1 Transaction T iming Elements 172 A.1.l Token Holding T ime ........ 172 A.1.2 Worst Case t imins ng Examples 172 A. 1.3 Data Response Time ...... 174 A. 2 The Message Format HDLC Level HDLC Fields 176 a. 3 The Message Format MA C Level 178 a 3.1 MA C Fields 178 a. 4 The Message Format LLC Level 180 A.4.1 LLC Fields 181 Appendix B Message Routing ,,,,,,,,,,,,,,,,.183 B. 1 The Modbus Plus Message Routing Path 184 B. 2 Modbus A ddress Conversion 186 B 3 Controller Bridge Mode Routing 188 B 4 Bridge Multiplexer Routi 190 B 4. 1 Routing examples 192 Appendix C Planning Worksheets∴. ■■■ ,,,,.195 C. 1 USing the worksheets 196 Contents 890UsE10000

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