Practical_modern_SCADA_protocols_-_dnp3,_60870-5_and_Related_Systems

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344 Practical Modern SCADA Protocols: DNP3, 60870.5 and Related Systems The various ICMP messages are shown in the Figure 12.18. Figure 12.18 ICMP message formats
The three common fields are: Ethernet and TCP/IP networks 345 • An ICMP message type (4 bits) which is a code that identifies the type of ICMP message • Code (4 bits) in which interpretation depends on the type of ICMP message • A checksum (16 bits) that is calculated on the entire ICMP datagram ICMP messages can be further subdivided into two broad groups viz. ICMP error messages (destination unreachable, time exceeded, invalid parameters, source quench or redirect) and ICMP query messages (echo request and reply messages, timestamp request and reply messages, and subnet mask request and reply messages). Here follows a few examples of ICMP error messages Source quench If a gateway (router) receives a high rate of datagrams from a particular source it will issue a source quench ICMP message for every datagram it discards. The source node will then slow down its rate of transmission until the source quench messages stop, at which stage it will gradually increase the rate again. Redirection When a gateway (router) detects that a source node is not using the best route in which to transmit its datagram, it sends a message to the node advising it of the better route. Time exceeded If a datagram has traversed too many routers, its TTL counter will eventually reach a count of zero. The ICMP time exceeded message is then sent back to the source node. The timeexceeded message will also be generated if one of the fragments of a fragmented datagram fails to arrive at the destination node. Parameter problem messages When there are problems with a particular datagram’s contents, a parameter problem message is sent to the original source. The pointer field points to the problem bytes. Unreachable destination When a gateway is unable to deliver a datagram, it responds with this message. The datagram is then ‘dropped’ (deleted). In addition to the reports on errors and exceptional conditions, there is a set of ICMP messages to request information, and to reply to such request. Echo request and reply An echo request message is sent to the destination node. This message essentially inquires: ‘Are you alive?’ A reply indicates that the pathway (i.e. the network(s) in between, the gateways (routers) and the destination node are all operating correctly. Timestamp request and replies This can be used to estimate to synchronize the clock of a host with that of a timeserver.
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Practical Modern SCADA Protocols: D
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Practical Modern SCADA Protocols: D
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Contents Preface ..................
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Contents vii 12.6 Frame reception .
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Preface ix Chapter 3: Open SCADA pr
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1 Introduction Objectives When you
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Introduction 3 Figure 1.2 PC to IED
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Introduction 5 The interconnection
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Introduction 7 a number of sub-path
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Introduction 9 The Internet protoco
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Introduction 11 Outside the utiliti
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Fundamentals of SCADA communication
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Key features of SCADA software incl
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2.2.2 Control processor unit (or CP
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2.5.2 Multi-point architecture (Mul
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2.6 Communication philosophies Fund
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Pin 8 - Data carrier detect (DCD) F
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2.7.6 Synchronous communications 2.
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The two most common modes of operat
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2.8.3 Error control/flow control Fu
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3 Open SCADA protocols DNP3 and IEC
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3.2.2 DNP 3.0 and IEC 60870 protoco
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4.2 Interoperability and open stand
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Preview of DNP3 69 The DNP3 User Gr
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Preview of DNP3 71 The capability t
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5 Fundamentals of distributed netwo
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Fundamentals of distributed network
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5.3.6 Full-duplex procedures Fundam
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The message sequences are shown in
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These rules are illustrated in the
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Freeze functions are typically used
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6 Advanced considerations of distri
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Advanced considerations of distribu
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6.2 Interoperability between DNP3 d
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6.3.2 Data classes and events Advan
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Recommendations: 6.3.9 Multiple obj
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6.3.15 Time-tagged binary input eve
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Preview of IEC 60870-5 171 7.2 Stan
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Preview of IEC 60870-5 173 Under IE
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Preview of IEC 60870-5 175 over cor
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8 Fundamentals of IEC 60870-5 8.1 T
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Fundamentals of IEC 60870-5 179 8.1
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8.1.9 IEC 60870-5-101 1995 Fundamen
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Fundamentals of IEC 60870-5 183 pro
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Fundamentals of IEC 60870-5 185 MAS
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8.4 Data link layer Fundamentals of
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8.4.2 Order of information Fundamen
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8.4.5 Unbalanced and balanced trans
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Fundamentals of IEC 60870-5 193 Sta
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Station/link initialization, balanc
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Fundamentals of IEC 60870-5 197 The
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Fundamentals of IEC 60870-5 199 To
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Function codes from secondary stati
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Fundamentals of IEC 60870-5 203 is
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The following notes apply to these
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Fundamentals of IEC 60870-5 207 Typ
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Fundamentals of IEC 60870-5 211 Whe
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Fundamentals of IEC 60870-5 215 to
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Fundamentals of IEC 60870-5 217 Mas
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Fundamentals of IEC 60870-5 219 Qua
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Fundamentals of IEC 60870-5 221 Key
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Fundamentals of IEC 60870-5 223 SVA
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Fundamentals of IEC 60870-5 225 Key
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Fundamentals of IEC 60870-5 227 DCO
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8.6.4 Qualifier information element
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Key - QOC Qualifier of command QU Q
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Fundamentals of IEC 60870-5 233 SCQ
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Fundamentals of IEC 60870-5 235 LOF
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Fundamentals of IEC 60870-5 237 FBP
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Fundamentals of IEC 60870-5 239 In
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Fundamentals of IEC 60870-5 247 Val
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Type 11 Measured, scaled value Fund
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Type 20 Packed single-point with st
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Fundamentals of IEC 60870-5 259 Pro
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9.1.1 Station initialization Advanc
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9.1.2 Data acquisition Advanced con
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Advanced considerations of IEC 6087
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Page 329 and 330: Intelligent electronic devices (IED
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Page 335 and 336: Ethernet and TCP/IP networks 319 Th
Page 337 and 338: Ethernet and TCP/IP networks 321 Fi
Page 339 and 340: 12.2.5 10Broad36 12.2.6 1Base5 Ethe
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Page 345 and 346: 12.8.4 Length Ethernet and TCP/IP n
Page 347 and 348: Ethernet and TCP/IP networks 331 To
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Page 351 and 352: 12.12 TCP/IP Ethernet and TCP/IP ne
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Page 355 and 356: Ethernet and TCP/IP networks 339 Fi
Page 357 and 358: Here follows a brief description of
Page 359: Unicast addresses Ethernet and TCP/
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Page 365 and 366: 13 Fieldbus and SCADA communication
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Page 371 and 372: • Programmable logic controllers
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Page 377 and 378: Figure 13.9 High speed Ethernet and
Page 379 and 380: 14.2 UCA development UCA protocol 3
Page 381 and 382: 14.3.1 Uniform communications infra
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Page 385 and 386: 14.3.5 Uniform data model UCA proto
Page 387 and 388: Figure 14.6 Device object model ove
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Page 391 and 392: Applications of DNP3 and SCADA prot
Page 397 and 398: PDS 500 Data Map Applications of DN
Page 407 and 408: 16 Future developments Objectives W
Page 409 and 410: Appendix A Glossary 3GPP 10Base2 10
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Appendix A: Glossary 395 ATM Attenu
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Appendix A: Glossary 397 Capacitanc
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Appendix A: Glossary 399 Decibel (d
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Appendix A: Glossary 401 ESS Etherl
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Appendix A: Glossary 403 I/O addres
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Manchester encoding Appendix A: Glo
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Appendix A: Glossary 407 Packet PAD
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Appendix A: Glossary 409 RFI Ring R
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Appendix A: Glossary 411 TDMA TDR T
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Appendix A: Glossary 413 X.25 CCITT
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Appendix B: Implementers of DNP3 41
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Appendix B: Implementers of DNP3 41
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DNP3 device profile Appendix C: Sam
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Appendix C: Sample device profile d
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Software setup Appendix D: Practica
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Appendix D: Practicals 431 1. Set u
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Objectives • To show how a basic
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Implementation/setting up TCP/IP Cl
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Appendix D: Practicals 437 Click on
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Appendix D: Practicals 441 Now rese
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Appendix D: Practicals 443 Practica
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Appendix D: Practicals 445 This sho
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Appendix D: Practicals 447 Once you
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IMPORTANT NOTICE: Appendix D: Pract
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Appendix D: Practicals 451 (This is
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Appendix D: Practicals 453 PRACTICA
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Click on the Diags button and the f
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Appendix D: Practicals 457 The scre
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Appendix D: Practicals 459 Assume t
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Appendix D: Practicals 461 Problem
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Network Loading Assumptions Item Da
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2. IEC 60870-5-101 Packet Analysis
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3.1.1.1.1 Appendix D: Practicals 46
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Appendix D: Practicals 469 Valid Ca
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3.1.1.1.7 Type 14 INFORMATION OBJEC
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Appendix D: Practicals 473 3.1.1.1.
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Appendix D: Practicals 475 QDS Qual
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Appendix D: Practicals 477 7 6 5 4
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3.1.1.1.11 Communication 1 Appendix
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Communication 1 Answer Appendix D:
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CITECT PRACTICAL For Citect Version
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Appendix D: Practicals 485 Next cli
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Appendix D: Practicals 487 (3) Defi
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Appendix D: Practicals 489
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Appendix D: Practicals 491 (4) Crea
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Appendix D: Practicals 493 Use the
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Appendix D: Practicals 497 When fin
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Appendix D: Practicals 499 What is
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Communication 2 05640DC405001A00637
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05640DC405001A006378C6C601010200003
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Appendix D: Practicals 505 What are
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Appendix D: Practicals 507 01 01 01
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Appendix D: Practicals 509 E2 81 00
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Appendix D: Practicals 511 At fist
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Appendix D: Practicals 513 Then rem
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Appendix D: Practicals 515 The next
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Packet Interpretation Practical App
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056408C40300A200EA80C5C5171E4405641
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Appendix D: Practicals 521 Communic
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05640DC405001A006378C6C601010200003
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Appendix D: Practicals 525 What is
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01 01 01 01 01 01 01 crc:BB crc:C3
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Appendix D: Practicals 529 Read Dat
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Index 531 Carrier sense with multip
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Index 533 support for protocol, 310
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Index 535 process related, 220 bina
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Index 537 signal quality detector,
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