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ControlLogix Data Highway Plus-Remote IO Communication Interface Module User Manual

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ControlLogix Data Highway Plus-Remote I/O Communication Interface Module1756-DHRIOUser ManualImportant User InformationBecause of the variety of uses for the products described in this publication, those responsible for the application and use of these products 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. In no event will Rockwell Automation be responsible or liable for indirect or consequential damage resulting from the use or application of these products.Any illustrations, charts, sample programs, and layout examples shown in this publication are intended solely for purposes of example. Since there are many variables and requirements associated with any particular installation, Rockwell Automation 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 Rockwell Automation 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 part, without written permission of Rockwell Automation, is prohibited.Throughout this publication, notes may be used to make you aware of safety considerations. The following annotations and their accompanying statements help you to identify a potential hazard, avoid a potential hazard, and recognize the consequences of a potential hazard:Allen-Bradley is a trademark of Rockwell AutomationWARNING!Identifies information about practices or circumstances that can cause an explosion in a hazardous environment, which may lead to personal injury or death, property damage, or economic loss.ATTENTION!Identifies information about practices or circumstances that can lead to personal injury or death, property damage, or economic loss.IMPORTANTIdentifies information that is critical for successful application and understanding of the product.1Publication 1756-UM514B-EN-P - February 2003Summary of ChangesIntroductionThis release of this document contains new and updated information. To find new and updated information, look for change bars, as shown next to this paragraph.Updated InformationThe following changes were made in this release of the manual:•The manual has been reorganized to keep specific information together.–DH+ information (e.g. description of DH+ operation, software usage in DH+ applications, DH+ examples) is grouped together in Chapters 2 through 8. –Remote I/O and block transfer information is grouped together in Chapters 9 through 13.For a full description of the manual’s organization, see Table Preface.1 on page Preface-2 or the Table of Contents.•The description of how to use software with 1756-DHRIO module is expanded, as follows:–Chapter 3 explains Using Programming Software in DH+ Applications.–Chapter 9 explains Using RSLogix 5000 in Remote I/O and Block Transfer Applications.•Appendix C, Application Guidelines and Tips, has been included in the manual to assist you in improving the performance of your 1756-DHRIO module.Publication 1756-UM514B-EN-P - February 2003Summary of Changes 2Notes:1Publication 1756-UM514B-EN-P - February 2003PrefacePurpose of This ManualThis manual describes how to understand, configure and troubleshoot your ControlLogix Data Highway Plus/Remote I/O communication interface module (1756-DHRIO module).This manual also provides step-by-step procedures on how to:•use the 1756-DHRIO module to send DH+ messages between ControlLogix controllers, PLCs and SLCs in DH+ applications.and•connect ControlLogix controllers to remote I/O and send block transfers via the 1756-DHRIO module.Throughout this manual, we describe ControlLogix systems that use the 1756-DHRIO module and ControlLogix controllers. Multiple ControlLogix controllers are available. The examples contained in this manual do not call out specific catalog numbers for ControlLogix controllers. Whenever a controller is shown, any of the controllers apply.For a complete list of ControlLogix controllers, and a description of each, see the ControlLogix Selection Guide, publication 1756-SG001.Who Should Use This ManualThis manual is intended for those individuals who program applications that use 1756-DHRIO modules, such as:•software engineers•control engineers•application engineers•instrumentation techniciansWe assume you have a good understanding of the Data Highway Plus protocol and Remote I/O. This user manual contains a brief description of Data Highway Plus in Chapter 2 and a brief description of Remote I/O in Chapters 10 & 11.

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