Practical_modern_SCADA_protocols_-_dnp3,_60870-5_and_Related_Systems

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Appendix D Practicals SESSION 1: MODBUS PROTOCOL Overview The Modbus protocol is still one of the most popular protocols used in the world today and is used extensively in industrial automation and SCADA systems. It is interesting to compare this with the DNP3 protocol used later on in the exercises. It is preferable to use a PC setup a protocol analyzer with two active serial ports to monitor the messages (request and response). This is possible by using the existing comport on the PC along with an add on com port in the form of either a PCMCIA card or USB com port device. In this practical we will use two computers connected by a Laplink cable to simulate the transfer of data from an RTU to the monitoring computer. Therefore we will only need one com port to monitor data in one direction. Procedure The hardware required for this practical is as follows: • Two personal computers running Windo-ws 95/98/ME/XP/2000/NT • One Laplink cross over cable (two 9-pin connectors/two 25-pin connectors) for RS-232 The software required is as follows: • IDC’s Modbus software running on both PCs • IDC’s protocol analysis software tool (PAT) running on one PC Hardware setup • Boot up both computers • Connect the ends of the Laplink cable to the com 1 port on each computer.
Software setup Appendix D: Practicals 429 • Load up the Modbus program on both PCs. • Execute Modbus and set the one PC to master device using the F10 key to toggle the setting. Set the other up as the slave. • Confirm the Modbus communications setup by hitting the F11 key on both computers. • Select 9600 baud and 8 data bits and no parity (why is no parity selected?). • Press the page/down key on the slave and set the coils A and B as 1s. • Press the page/up key to return to the main page. Test procedure 1. Create a protocol message on the master device by selecting the F3 function key. Key in 000A0002. This selects the read coil function code (F2 - 01) to read 2 points starting at address 0A hexadecimal. Note: This function allows the host to obtain the ON/OFF status of one or more logic coils in the target device. The data field of the request consists of the offset address of the first coil (A) followed by the number of coils to be read (2)(A and B). The data field of the response frame consists of a count of the coil bytes followed by that many bytes of coil data. 1. Press the F9 key on the master and then follow the screen prompts. 2. Verify that the correct data was transferred between both PCs as shown. 3. On the slave computer exit out of the Modbus software. 4. Run the PAT software on the slave computer 5. Set up the PAT software to match these parameters using the Port settings.
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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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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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Page 397 and 398: PDS 500 Data Map Applications of DN
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Page 435 and 436: DNP3 device profile Appendix C: Sam
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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 495 Click on
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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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Appendix D: Practicals 521 Communic
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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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