Practical_modern_SCADA_protocols_-_dnp3,_60870-5_and_Related_Systems

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The message sequences are shown in the following drawings. Fundamentals of distributed network protocol 101 MASTER OUTSTATION Send request Accept Optional Confirm Process Request Accept Send response Optional Confirm Figure 5.21 Application message sequences In the above sequence, the outstation receives a request from the master station. If the master station has set a ‘confirm’ bit, the outstation will send a confirm message. It will at the same time commence processing the request. Once it has assembled the necessary information it will send its response. The master station will send a confirmation if the confirm bit is set in the response. The case of an unsolicited response is shown below. An event or defined process change is detected, causing the generation of a message by the outstation. MASTER OUTSTATION Process change or event Accept Send `Unsolicited response' Optional Confirm Figure 5.22 Unsolicited response message
102 Practical Modern SCADA Protocols: DNP3, 60870.5 and Related Systems Whilst the message sequences appear simple enough, complexities arise from various causes. This includes the need to generate multi-fragment messages, and the need to handle crossovers in communications such as might arise if both a master and an outstation send messages simultaneously. These complexities are catered for by ‘flow control’ and the APCI, discussed in the following sections. 5.6.3 Application message formats As noted previously, application messages are of two types, request and response. Each of these appear as one or more APDUs. Each APDU is made up of a header which is termed the application protocol control information, and optional data, the ASDU. APDU APCI ASDU 2-4 0-2046/2044 REQUEST HEADER AC RESPONSE HEADER FC AC FC IIN 1 1 1 1 2 Key AC FC IIN Application Control Function Code Internal Indications Figure 5.23 Application message format The request and response headers differ by one field. The response header includes an additional two-byte field designated internal indications (IIN). The content of the ASDU is not depicted in this drawing, but it is made up of data objects, each with an object header. These will be presented in detail later. For now the ASDU may be thought of merely as data. 5.6.4 Application control field The application control field is the first byte of the control information, or APCI. It is used to control the communication flow. It has three bits or flags, plus a sequence number which is used to sequentially number fragments.
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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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Page 62 and 63: Fundamentals of SCADA communication
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Page 80 and 81: Preview of DNP3 69 The DNP3 User Gr
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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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In Figure 9.4 the following time sy
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Basic application functions: 9.2.3
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10 Differences between DNP3 and IEC
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Data objects: Differences between D
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10.2 Which one will win? Difference
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Intelligent electronic devices (IED
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11.2.5 Communications Intelligent e
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Ethernet and TCP/IP networks 317 tr
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Ethernet and TCP/IP networks 319 Th
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Ethernet and TCP/IP networks 321 Fi
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12.2.5 10Broad36 12.2.6 1Base5 Ethe
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Ethernet and TCP/IP networks 325 si
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Ethernet and TCP/IP networks 327 As
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12.8.4 Length Ethernet and TCP/IP n
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Ethernet and TCP/IP networks 331 To
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12.11.8 Fast Ethernet Ethernet and
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12.12 TCP/IP Ethernet and TCP/IP ne
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Ethernet and TCP/IP networks 337
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Ethernet and TCP/IP networks 339 Fi
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Here follows a brief description of
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Unicast addresses Ethernet and TCP/
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The three common fields are: Ethern
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Ethernet and TCP/IP networks 347 Th
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13 Fieldbus and SCADA communication
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Fieldbus and SCADA communications s
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• Programmable logic controllers
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Three such ‘services’ are readi
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Figure 13.9 High speed Ethernet and
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14.2 UCA development UCA protocol 3
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14.3.1 Uniform communications infra
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UCA protocol 367 14.3.4 Uniform app
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14.3.5 Uniform data model UCA proto
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Figure 14.6 Device object model ove
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UCA protocol 373 An excellent refer
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Applications of DNP3 and SCADA prot
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PDS 500 Data Map Applications of DN
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16 Future developments Objectives W
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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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