Practical_modern_SCADA_protocols_-_dnp3,_60870-5_and_Related_Systems

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350 Practical Modern SCADA Protocols: DNP3, 60870.5 and Related Systems Figure 13.1 Profibus protocol architecture (courtesy of Profibus) 13.2.2 The physical layer The physical layer specifies the type of Profibus transmission medium. The EIA-485 voltage standard is defined for the FMS and DP versions of Profibus. The IEC 1158-2 is used in the PA version: • FMS (RS-485): 187.5 Kbps General use • DP (RS-485): 500 Kbps/1.5 Mbps/12 Mbps Fast devices • PA (IEC 1158-2): 31.25 Kbps Intrinsically safe Basic properties of the RS-485 voltage standard for Profibus Topology: Linear bus, terminated at both ends Medium: Twisted pair shielded cable Wire size: 18 AWG (0.8 mm) Attenuation: 3 dB/km at 39 kHz Number of stations: 32 stations without repeaters extendible to 127 Bus length: max. 1200 meters extendible to 4800 meters at slow rates Speed: up to 12 Mbps Connector: Phoenix-type screw or 9-pin D-sub connector IEC 1158-2 is a standardized current standard used in special areas of a factory or plant that require intrinsically safe devices. IEC 1158-2 modulates a Manchester encoded bipolar NRZ +/–10 mA signal on top of a 9 to 32 V DC voltage. This 10 mA creates a +/– 1-volt signal that is read by each of the devices on the bus.
Fieldbus and SCADA communications systems 351 It is very easy to connect Profibus FMS, DP and PA versions together on the same system, as the main difference between them is only the physical layer. This allows deployment of lower cost devices in most of the plant (FMS) and fast devices (DP) in parts of the plant that need the speed. Intrinsically safe devices (PA) are used in the areas of the plant where intrinsic safety is required. 13.2.3 The data link layer The data link layer is defined by Profibus as the fieldbus data link layer (FDL). The medium access control (MAC) part of the FDL defines when a station may transmit data. The MAC ensures that only one station transmits data at any given time. Profibus communication is termed hybrid medium access. It uses two methods of operation, namely token passing and master/slave operation. The token passing method ensures the assignment of the bus access right within a precisely defined time interval. The token is circulated between all masters with a maximum (and configurable) token rotation time. Token passing is especially useful for communication between complex automation masters that require equal rights on the bus. The token is passed in a defined sequence (in order of increasing addresses). The master/slave method allows the master that currently has the token to communicate with the associated slave devices. The master can then read from or write data to the slave devices. A typical configuration is shown below. Figure 13.2 Typical architecture of a Profibus system During the bus system startup phase, the task of the active station’s media access control layer (MAC) is to detect logical assignment and establish the token ring. The MAC also handles adding or deleting stations (which have become inactive), deleting multiple nodes with the same address or deleting multiple or lost tokens.
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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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In Figure 9.4 the following time sy
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Page 315 and 316: Basic application functions: 9.2.3
Page 317 and 318: Advanced considerations of IEC 6087
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Page 327 and 328: 10.2 Which one will win? Difference
Page 329 and 330: Intelligent electronic devices (IED
Page 331 and 332: 11.2.5 Communications Intelligent e
Page 333 and 334: Ethernet and TCP/IP networks 317 tr
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
Page 341 and 342: Ethernet and TCP/IP networks 325 si
Page 343 and 344: Ethernet and TCP/IP networks 327 As
Page 345 and 346: 12.8.4 Length Ethernet and TCP/IP n
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Page 349 and 350: 12.11.8 Fast Ethernet Ethernet and
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Page 355 and 356: Ethernet and TCP/IP networks 339 Fi
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Page 365: 13 Fieldbus and SCADA communication
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Page 371 and 372: • Programmable logic controllers
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Page 375 and 376: Three such ‘services’ are readi
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
Page 383 and 384: UCA protocol 367 14.3.4 Uniform app
Page 385 and 386: 14.3.5 Uniform data model UCA proto
Page 387 and 388: Figure 14.6 Device object model ove
Page 389 and 390: UCA protocol 373 An excellent refer
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
Page 411 and 412: Appendix A: Glossary 395 ATM Attenu
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Page 415 and 416: 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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