Allen-Bradley Application SCADA System Guide (Publication AG-6.5.8) Important User Information Because of the variety of uses for the products described in this publication, those responsible for the application and use of this control equipment must satisfy themselves that all necessary steps have been taken to assure that each application and use meets all performance and safety requirements, including any applicable laws, regulations, codes and standards. The illustrations, charts, sample programs and layout examples shown in this guide are intended solely for purposes of example. Since there are many variables and requirements associated with any particular installation, Allen-Bradley does not assume responsibility or liability (to include intellectual property liability) for actual use based upon the examples shown in this publication. Allen-Bradley publication SGI–1.1, Safety Guidelines for the Application, Installation, and Maintenance of Solid State Control (available from your local Allen-Bradley office), describes some important differences between solid-state equipment and electromechanical devices that should be taken into consideration when applying products such as those described in this publication. Reproduction of the contents of this copyrighted publication, in whole or in part, without written permission of Allen-Bradley Company, Inc., is prohibited. Throughout this manual we use notes to make you aware of safety considerations: ATTENTION: Identifies information about practices ! or circumstances that can lead to personal injury or death, property damage or economic loss. Attention statements help you to: • identify a hazard • avoid the hazard • recognize the consequences Important: Identifies information that is critical for successful application and understanding of the product. Publication AG-6.5.8 - October 1998 Summary of Changes Introduction This document has been revised since the June 1996 printing. Changes to this document are so extensive, that it is impractical to mark every change with a revision bar in the margin of the page. The purpose of this section is to outline the changes in the SCADA Application Guide. Scope of Changes This SCADA Application Guide represents the latest developments in Allen-Bradley hardware and software, and includes the most recent third-party supplier information as it relates to SCADA applications. Changes incorporated in this document include: • The updating of the enhanced PLC-5 chapter (Chapter 2), including new screen captures from RSLogix 5 and messaging details. • The restructuring of the SLC 5/03, 5/04 chapter (Chapter 4) to include the SLC 5/05, new screen captures from RSLogix 500 and messaging details. • The addition of a MicroLogix chapter, (Chapter 6) which details the use of MicroLogix controllers in SCADA applications. • The addition of a Logix5550 chapter, (Chapter 7) which details the use of the Logix5550 controller in SCADA applications. • Updated third-party modem documentation (Chapter 8). • The addition of a RSLinx chapter, which details the configuration of the RSLinx DF1 Polling Master and DF1 Slave drivers for use in SCADA applications. • The addition of an appendix (Appendix E) which provides detailed examples of messaging ladder logic that is typical to SCADA applications. Publication AG-6.5.8 - October 1998 Preface What SCADA Information Two principle SCADA documents are available: Is Available? FSSlCCeAAxiDDblAAe SNSoyelseutdteismon Ss efloerc Ytioonu rG uide SCADA System Selection Guide SCADA System Application Guide Publication AG-2.1 Publication AG-6.5.8 (this manual) • Presents A-B capabilities • Describes how to configure for SCADA applications A-B products and third-party modems • Guides you through choosing SCADA system • Describes how to send components messages • Gives application samples Audience We designed this document for individuals who are configuring a SCADA system or are answering configuration questions. This document assumes you know how to: • handle, install, and operate the products referenced in this document • install, navigate through, and use the software products referenced in this document • prepare cables, if necessary Publication AG-6.5.8 - October 1998 ii Book Overview chapter 1 Designing Communication Design chapter 3 chapter 4 chapter 2 Configuring Classic PLC-5 Configuring SLC-5/03,5/04 Configuring Enhanced PLC-5 Processors with 1785-KE and 5/05 Processors Processors Modules Configure chapter 5 chapter 6 chapter 7 Configuring SLC 500 Configuring MicroLogix Configuring Logix5550 Processors with 1747-KE Controllers Processors Interface Modules chapter 8 chapter 9 Configuring Modems Configuring RSLinx 2.0 Software for DF1 Half-duplex Communications chapter 10 chapter 11 Apply Using Dial-up Telephone Remotely Programming Communication PLC-5 and SLC 500 Processors appendix A appendix B appendix C Modem Cable Reference Basic DF1 Protocol Third-Party Supplier Contact Troubleshooting Information Reference appendix D appendix E Glossary Worksheets Sample Ladder Logic Publication AG-6.5.8 - October 1998 iii Terms We use these terms frequently in this book: Term: Definition: Classic PLC–5 processor A collective name used to refer to PLC–5/10, –5/12, –5/15, and –5/25 processors. Enhanced PLC–5 processor A collective name used to refer to PLC–5/11, –5/20, –5/30, –5/40, –5/60, and PLC–5/80 processors. Ethernet PLC–5 processor A collective name used to refer to PLC–5/20E, –5/40E, and –5/80E processors. master station A device (programmable controller with I/O modules or a workstation) that sends data to and collects data from devices connected on a point-to-multipoint, half-duplex network. slave station A device (programmable controller with I/O modules) that is located in a remote site away from the master station and that controls I/O points at the remote site. A slave station accepts commands from and can send data (if capable) to a master station via a telemetry network. See the Glossary for other definitions. Conventions This section explains the following conventions: • addresses • identifying where you are within the manual Addresses These values: Are represented like: octal X 8 decimal X 10 Publication AG-6.5.8 - October 1998 iv Related Publications Use these manuals as necessary:: Title: Publication Number: Automation Systems Catalog Enhanced and Ethernet PLC–5 Programmable Controllers User 1785–6.5.12 Manual Classic PLC–5™ Family Programmable Controllers Hardware 1785–6.6.1 Installation Manual 1785 PLC–5 Family Programmable Controllers Quick 1785–7.1 Reference PLC–5 Instruction Set Reference Manual 1785–6.1 1785–KE DH+ Communications Interface Module User Manual 1785–6.5.2 SLC 500™ and MicroLogix™ 1000 Instruction Set Reference 1747–6.15 Manual SLC 500 Modular Hardware Style Installation and Operation 1747–6.2 Manual DH–485/RS232C Interface Module User Manual 1747–6.12 MicroLogix™ 1000 Programmable Controllers Users Manual 1761-6.3 Logix5550 Controller User Manual 1756-6.5.12 Logix5550 Controller Programming Manual 1756-6.4.1 Publication AG-6.5.8 - October 1998 Table of Contents Chapter 1 Designing Communication Use This Chapter . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Choosing a Polling Mode for DF1 Half-Duplex Master. . . . . . . . . . . . . 1-2 Message-Based Polling Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Standard Polling Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 About Slave-to-Slave Messaging . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 Addressing Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 Communication Scheme Design Using Standard-Mode . . . . . . . . . . . 1-6 Designing a Polling Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10 Planning for Timing Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12 Design Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12 Communication Scheme Design Using Message-based Mode . . . . . 1-14 Designing Communication for Full-Duplex Protocol. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14 What to Do Next?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16 Chapter 2 Configuring Enhanced PLC-5 Use This Chapter... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Processors Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Installing the Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 Configuring a DF1 Half-Duplex Standard Mode Master Station. . . . . . 2-3 Define the Communication Driver Characteristics . . . . . . . . . . . . . 2-4 Displaying System (Master) Channel Status . . . . . . . . . . . . . . . . . . 2-6 Create Station Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 Monitor Active Stations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 Configuring a DF1 Half-Duplex Message-based Mode Master Station. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 Configuring the Processor as a Slave Station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 Displaying Slave System Channel Status . . . . . . . . . . . . . . . . . . . 2-16 Configuring the Processor as a Station on a Point-to-Point Link. . . . 2-18 Displaying Point-to-Point System Channel Status. . . . . . . . . . . . . 2-20 Messaging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21 Master Station to Slave Station . . . . . . . . . . . . . . . . . . . . . . . . . 2-21 Polled Report-by-Exception . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21 Processor-to-Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22 Considerations When Configuring MSG Control Blocks . . . . . . . . 2-23 Example MSG Control Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24 Publication AG-6.5.8 - October 1998 ii Table of Contents – SCADA System Selection Guide Chapter 3 Configuring Classic PLC-5 Use This Chapter. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Processors with 1785-KE Modules Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Installing the Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Configuring and Installing the 1785-KE Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 Connecting the Processor and 1785-KE Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 Messaging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 Polled Report-by-Exception . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 Processor-to-Processor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 Considerations When Configuring MSG Control Blocks . . . . . . . . . 3-6 Example MSG Control Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 Chapter 4 Configuring SLC 5/03, 5/04 Use This Chapter.... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 and 5/05 Processors Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Installing the Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 Using Modems that Support DF1 Communication Protocols. . . . . . . . 4-2 Dial-up Phone Modems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 Leased-Line Modems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 Radio Modems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 Line Drivers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 Modem Control Line Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 DF1 Full-Duplex. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 No Handshaking Selected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 Full-Duplex Modem Selected. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 DF1 Half-Duplex Slave. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 No Handshaking Selected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 Half-Duplex Modem with Continuous Carrier Selected . . . . . . . . . . 4-5 Half-Duplex Modem without Continuous Carrier Selected. . . . . . . . 4-5 DF1 Half Duplex Master. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5 No Handshaking Selected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5 Full-Duplex Modem Selected. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5 Half-Duplex Modem without Continuous Carrier Selected. . . . . . . . 4-5 Configuring DF1 Half-Duplex Channel 0 Parameters . . . . . . . . . . . . . 4-6 RTS Send Delay and RTS Off Delay . . . . . . . . . . . . . . . . . . . . . . . . 4-6 Configuring a Standard-Mode DF1 Half-Duplex Master Station . . . . . 4-7 Minimum DF1 Half-Duplex Master Channel 0 ACK Timeout . . . . . 4-10 Determining Minimum Master ACK Timeout. . . . . . . . . . . . . . . . . 4-10 DF1 Half-Duplex Master Channel Status. . . . . . . . . . . . . . . . . . . . 4-12 Monitor Active Stations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13 Configuring a Message-based Mode DF1 Half-Duplex Master Station. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14 Configuring a Slave Station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17 Configuring Channel 0 Poll Timeout. . . . . . . . . . . . . . . . . . . . . . . . . 4-19 DF1 Half-Duplex Slave Channel Status. . . . . . . . . . . . . . . . . . . . . 4-20 Configuring a Station on a Point-to-Point Link . . . . . . . . . . . . . . . . . 4-21 DF1 Full-Duplex Channel Status. . . . . . . . . . . . . . . . . . . . . . . . . . 4-23 Messaging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25 Publication AG-6.5.8 - October 1998 Table of Contents – SCADA System Application Guide iii Master Station to Slave Station . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25 Polled Report-by-Exception . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25 Processor-to-Processor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25 Considerations When Configuring MSG Control Blocks . . . . . 4-26 For both Point-to-Multipoint and Point-to-Point Link Configurations. 4- 26 Minimum Master MSG Block Message Timeout . . . . . . . . . . . . . . 4-26 Message-based Polling Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27 Standard Polling Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28 Standard Polling Mode With Single Message Transfer . . . . . . . . . 4-28 Standard Polling Mode With Multiple Message Transfer. . . . . . . . 4-28 Minimum Slave MSG Block Message Timeout . . . . . . . . . . . . . . . 4-30 Minimum Point-to-Point MSG Block Message Timeout. . . . . . . . . 4-30 Example MSG Control Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30 Chapter 5 Configuring SLC 500™ Use This Chapter.... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Processors with 1747-KE Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Interface Modules Installing the Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Installing the 1747-KE Interface Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 Configuring the Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 Configuring the 1747-KE Interface Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 Prepare to Configure the Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 Configure the DF1 Protocol Driver . . . . . . . . . . . . . . . . . . . . . . . . . 5-6 Save the Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11 Messaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11 Polled Report-by-Exception . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11 Processor-to-Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12 Considerations When Configuring MSG Control Blocks . . . . . . . . 5-12 Point-to-Multipoint and Point-to-Point Link Configurations. . . . . . 5-12 Point-to-Multipoint Link Configurations . . . . . . . . . . . . . . . . . . . . 5-13 Point-to-Point Link Configurations . . . . . . . . . . . . . . . . . . . . . . . . 5-13 Example MSG Control Blocks . . . . . . . . . . . . . . . . . . . . . . . . . 5-13 Chapter 6 Configuring MicroLogix Use This Chapter.... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 Controllers Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 Installing the Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2 Isolated Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3 Automatic Protocol Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3 Using Modems that Support DF1 Communication Protocols. . . . . . . . 6-4 Dial-up Phone Modems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4 Leased-Line Modems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5 Radio Modems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5 Line Drivers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5 Modem Control Line Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6 DF1 Full-Duplex Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6 DF1 Half-Duplex Slave Operation. . . . . . . . . . . . . . . . . . . . . . . . . . 6-6 Publication AG-6.5.8 - October 1998