1771-6.5.115, Analog Input Module, User Manual
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AllenĆBradley Analog Input User Manual Module (Cat. No. 1771ĆIFE Series C) 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 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 which 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 make notes to alert you to possible injury to people or damage to equipment under specific circumstances. ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death, ! property damage, or economic loss. Attention helps you: • identify a hazard • avoid the hazard • recognize the consequences Important: Identifies information that is especially important for successful application and understanding of the product. Important: We recommend you frequently backup your application programs on appropriate storage medium to avoid possible data loss. DeviceNet, DeviceNetManager, and RediSTATION are trademarks of Allen-Bradley Company, Inc. PLC, PLC–2, PLC–3, and PLC–5 are registered trademarks of Allen-Bradley Company, Inc. Windows is a trademark of Microsoft. Microsoft is a registered trademark of Microsoft IBM is a registered trademark of International Business Machines, Incorporated. All other brand and product names are trademarks or registered trademarks of their respective companies. Summary of Changes Summary of Changes This edition of this publication contains new and revised information not included in the previous edition. New Information This edition of this document includes information formally included in a release note (publication 1771-6.5.115–RN1, September 1996). This information covered: • addition of an A/B simulation switch that allowed the Series C module to be used in place of Series A or B modules. • an appendix listing the major differences between Series of the Analog module. Updated Information In addition, minor corrections have been made in response to requests for change from users. Change Bars The areas in this manual which are different from previous editions are marked with change bars (as shown to the right of this paragraph) to indicate the addition of new or revised information. Publication 1771Ć6.5.115 - February 1999 Table of Contents Overview of the Analog Chapter 1 Input Module Chapter Objectives................................... 1-1 Module Description................................... 1-1 Features........................................... 1-1 Program Selectable Input Ranges..................... 1-2 How Analog Modules Communicate with Programmable Controllers 1-2 Communication Between Processor and Module.......... 1-2 Accuracy.......................................... 1-3 Chapter Summary.................................... 1-3 Installing the Input Module Chapter 2 Chapter Objectives................................... 2-1 Compliance to European Union Directives........................... 2-1 EMC Directive..................................... 2-1 Low Voltage Directive................................ 2-1 Before You Install Your Input Module....................... 2-2 Electrostatic Damage.................................. 2-2 Power Requirements.................................. 2-2 Locating the Module in the I/O Chassis..................... 2-3 Setting the Configuration Plugs on the Module................ 2-3 Key the Backplane Connector............................ 2-5 Installing the Analog Module............................. 2-6 Wiring Your Analog Input Module......................... 2-7 Minimizing Ground Loops............................. 2-7 Cable Lengths..................................... 2-7 Grounding.......................................... 2-12 Indicator Lights...................................... 2-13 Chapter Summary.................................... 2-13 Module Programming Chapter 3 Chapter Objectives................................... 3-1 Block Transfer Programming............................ 3-1 PLCĆ2 Programming.................................. 3-2 PLCĆ3 Programming.................................. 3-3 PLCĆ5 Programming.................................. 3-4 Module Scan Time.................................... 3-5 Chapter Summary.................................... 3-7 Publication 1771Ć6.5.115 iv Configuring Your Module Chapter 4 Chapter Objectives................................... 4-1 Configuring Your Input Module........................... 4-1 Input Range Selection................................. 4-2 Input Type.......................................... 4-3 Data Format........................................ 4-3 Digital Filtering...................................... 4-4 Real Time Sampling................................... 4-5 Scaling............................................ 4-6 Implementing the Scaling Feature....................... 4-6 Scaling Ranges.................................... 4-6 Default Configuration.................................. 4-8 Chapter Summary.................................... 4-10 Module Status and Input Chapter 5 Data Chapter Objectives................................... 5-1 Reading Data From Your Module......................... 5-1 Block Transfer Read Format............................. 5-2 Chapter Summary.................................... 5-3 Calibrating Your Module Chapter 6 Chapter Objective.................................... 6-1 When and How to Calibrate Your Analog Input Module.......... 6-1 Tools and Equipment.................................. 6-1 Checking Module Calibration............................ 6-2 Calibrating your Input Module............................ 6-3 Offset Calibration................................... 6-3 Write Block Transfer Word 38 for Offset Calibration......... 6-3 Read Block Transfer Word 21........................ 6-4 Write Block Transfer Word 39 for Gain Calibration......... 6-4 Read Block Transfer Word 22........................ 6-5 Chapter Summary.................................... 6-5 Troubleshooting Your Input Chapter 7 Module Chapter Objective.................................... 7-1 Diagnostics Reported by the Module....................... 7-1 Diagnostic Bits Reported By the Analog Input Module......... 7-1 Troubleshooting Chart for Analog Input Module (1771ĆIFE/C). 7-3 CheckingModule Operation............................. 7-4 Connect the Module in a Simple Test System............... 7-4 Checking for Common Mode Voltages...................... 7-7 Affect of Common Mode Voltage on Inputs................. 7-7 Troubleshooting a Bad Input............................. 7-8 Measuring Each Input with Respect to Module Common....... 7-8 Publication 1771Ć6.5.115 v Disconnecting Inputs from the Field Wiring Arm One at a Time While Observing Module Action.......................... 7-9 Testing for Input Channel Functionality................... 7-10 Chapter Summary.................................... 7-10 Specifications Appendix A Specifications....................................... A-1 Differences Between Series Appendix B A and B Modules and Differences Between Series A and B Modules and Series C Modules B-1 Series C Modules Programming Examples Appendix C Sample Programs for the Analog Input Module................ C-1 PLCĆ2 Family Processors............................... C-1 PLCĆ3 Family Processor............................... C-2 PLCĆ5 Family Processors............................... C-4 Data Table Formats Appendix D 4ĆDigit Binary Coded Decimal (BCD)....................... D-1 SignedĆmagnitude Binary............................... D-2 Two's Complement Binary.............................. D-3 Block Transfer (MiniĆPLCĆ2 Appendix E and PLCĆ2/20 Processors) Multiple GET Instructions Ć MiniĆPLCĆ2 and PLCĆ2/20 Processors.. E-1 Setting the Block Length (Multiple GET Instructions only)........ E-3 Forms Appendix F Analog Block Transfer Read............................. F-2 Analog Block Transfer Write............................. F-3 Publication 1771Ć6.5.115 Preface Using This Manual Purpose of Manual This manual shows you how to use your Analog Input module with an Allen-Bradley programmable controller. It helps you install, program, calibrate, and troubleshoot your module. Audience You must be able to program and operate an Allen-Bradley programmable controller to make efficient use of your input module. In particular, you must know how to program block transfers. We assume that you know how to do this in this manual. If you do not, refer to the appropriate programming and operations