Practical_modern_SCADA_protocols_-_dnp3,_60870-5_and_Related_Systems

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194 Practical Modern SCADA Protocols: DNP3, 60870.5 and Related Systems Figure 8.12 Link layer services The transmission procedures are a set of rules that ensure that transmissions are successfully carried out in response to link user requests. They must be able to cope with errors on the transmission channel that may introduce errors, or cause information to be lost. The transmission procedures are different for unbalanced and balanced links, and described for each in the following sections. 8.4.7 Link initialization Link initialization is a data link service carried out after a station has been off-line and first becomes available again. While the slave station is off-line the master periodically sends link status request functions until a status of link response is obtained. The sequences are shown following for both unbalanced and balanced modes. Station / link initialization, unbalanced mode: • Master sends link status request until status of link received • Master sends link reset • Link is active on receipt of ACK • Slave generates station initialization complete event
Station/link initialization, balanced mode: Fundamentals of IEC 60870-5 195 • Each station sends link status request until status of link received • Each station sends link reset • Link is active on receipt of ACK at each station • One or both may generate station initialization complete event 8.4.8 Unbalanced transmission procedures Unbalanced transmission procedures are required for links other than point-to-point, that is multi-point links. For these links the controlling station must control the data traffic by polling the outstations for data. Only when the controlling or primary station on a link polls a particular secondary station may that station respond. 8.4.9 The control field The control field of the data frame is central to the operation of the transmission procedures. This field is almost identical to that used by the DNP3 protocol because it was derived from the same source document, IEC 60870-5-2 1992. The interpretation of the control field is dependent on whether the communication is a primary or secondary message. Figure 8.13 shows the control field for unbalanced transmission procedures, including the short descriptions of the meanings of the function codes for primary and secondary messages. 1 0 Figure 8.13 Control field – unbalanced transmission
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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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Advanced considerations of distribu
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Page 169 and 170: 6.2 Interoperability between DNP3 d
Page 171 and 172: 6.3.2 Data classes and events Advan
Page 173 and 174: Recommendations: 6.3.9 Multiple obj
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Page 177 and 178: Advanced considerations of distribu
Page 187 and 188: Preview of IEC 60870-5 171 7.2 Stan
Page 189 and 190: Preview of IEC 60870-5 173 Under IE
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Page 193 and 194: 8 Fundamentals of IEC 60870-5 8.1 T
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Page 197 and 198: 8.1.9 IEC 60870-5-101 1995 Fundamen
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Page 201 and 202: Fundamentals of IEC 60870-5 185 MAS
Page 203 and 204: 8.4 Data link layer Fundamentals of
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Page 207 and 208: 8.4.5 Unbalanced and balanced trans
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Page 217 and 218: Function codes from secondary stati
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Page 221 and 222: The following notes apply to these
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Page 229 and 230: Fundamentals of IEC 60870-5 213 8.5
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Page 237 and 238: Fundamentals of IEC 60870-5 221 Key
Page 239 and 240: Fundamentals of IEC 60870-5 223 SVA
Page 241 and 242: Fundamentals of IEC 60870-5 225 Key
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Page 245 and 246: 8.6.4 Qualifier information element
Page 247 and 248: Key - QOC Qualifier of command QU Q
Page 249 and 250: Fundamentals of IEC 60870-5 233 SCQ
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Fundamentals of IEC 60870-5 245 Typ
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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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Fundamentals of IEC 60870-5 267 8.7
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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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