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Logix5000 Controllers General Instructions Reference Manual

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Reference ManualLogix5000 Controllers General Instructions Reference ManualCatalog Numbers 1756 ControlLogix, 1768 CompactLogix, 1769 CompactLogix, 1789 SoftLogix, 1794 FlexLogix, PowerFlex 700S with DriveLogixImportant User InformationSolid-state equipment has operational characteristics differing from those of electromechanical equipment. Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls (publication SGI-1.1 available from your local Rockwell Automation sales office or online at http://www.rockwellautomation.com/literature/) describes some important differences between solid-state equipment and hard-wired electromechanical devices. Because of this difference, and also because of the wide variety of uses for solid-state equipment, all persons responsible for applying this equipment must satisfy themselves that each intended application of this equipment is acceptable.In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the use or application of this equipment.The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or liability for actual use based on the examples and diagrams.No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or software described in this manual.Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation, Inc., is prohibited.Throughout this manual, when necessary, we use notes to make you aware of safety considerations.Allen-Bradley, Rockwell Software, Rockwell Automation, RSLogix5000, ControlLogix, CompactLogix, SoftLogix, FlexLogix, DriveLogix, PowerFlex 700S, FactoryTalk, FactoryTalk Alarms and Events, Logix5000, SLC, MicroLogix, PLC-2, PLC-3, PLC-5, PhaseManager, FactoryTalk View SE, RSLinx Enterprise, RSView, RSLogix Emulate 5000, SoftLogix 5800, and TechConnect are trademarks of Rockwell Automation, Inc.Trademarks not belonging to Rockwell Automation are property of their respective companies.WARNING: 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. Attentions help you identify a hazard, avoid a hazard, and recognize the consequenceSHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous voltage may be present.BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may reach dangerous temperatures.IMPORTANTIdentifies information that is critical for successful application and understanding of the product.Rockwell Automation Publication 1756-RM003N-EN-P - October 20113Summary of ChangesSummary of ChangesThis manual contains new and updated information. Changes throughout this revision are marked by change bars, as shown to the right of this paragraph.TopicPageAdded MDAC and MDCC motion instructions to Locator29Bit addressing88Configure MSG instructions156Get Audit Value, controller events and set controller events instructions176Get Controller Events Monitored for Changes Bit Definitions178Large Connection option for CIP Generic messages179Audit value and Changes To Detect instructions199Program attributes disable flag status value change; LEDStatus note for 1756-L7x controllers207Status flags644Expressions in array subscripts646Floating point values647LINT data types6504Rockwell Automation Publication 1756-RM003N-EN-P - October 2011Notes:Rockwell Automation Publication 1756-RM003N-EN-P - October 20115Table of ContentsInstruction LocatorWhere to Find an Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29PrefaceIntroduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Who Should Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Purpose of This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Common Information for AllInstructions . . . . . . . . . . . . . . . . . . . . . . . . . 38Conventions and RelatedTerms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38Relay Ladder Rung Condition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39Function Block States. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Additional Resources. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41Chapter 1FactoryTalk Alarms and EventsLogix-based Instructions(ALMD, ALMA)Digital Alarm (ALMD). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44Relay Ladder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44Structured Text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Function Block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45ALARM_DIGITAL Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45State Diagrams when Acknowledgement Required . . . . . . . . . . . . . . 49State Diagrams when Acknowledgment Not Required. . . . . . . . . . . 50ALMD Alarm Acknowledge Required and Latched . . . . . . . . . . . . . 51ALMD Alarm Acknowledge Required and Not Latched. . . . . . . . . 52ALMD Alarm Acknowledge Not Required and Latched. . . . . . . . . 52ALMD Alarm Acknowledge Not Required and Not Latched . . . . 53Relay Ladder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53Structured Text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54Function Block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54Analog Alarm (ALMA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55Relay Ladder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55Structured Text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56Function Block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56ALARM_ANALOG Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56State Diagrams when Acknowledgement Required . . . . . . . . . . . . . . 64State Diagrams when Acknowledgement Not Required. . . . . . . . . . 65ALMA Level Condition Acknowledge Required. . . . . . . . . . . . . . . . 67ALMA Level Condition Acknowledge Not Required. . . . . . . . . . . . 68ALMA Rate of Change Acknowledge Required . . . . . . . . . . . . . . . . 69ALMA Rate of Change Acknowledge Not Required . . . . . . . . . . . . 70Relay Ladder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71Structured Text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71Function Block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71Configure an Alarm Instruction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72Enter Alarm Message Text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74Message String Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75Multiple Language Versions of Alarm Messages . . . . . . . . . . . . . . . . . 76Monitor Alarm Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

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