Efficiency Tips, Introduction | Schneider Electric 840 USE 106 0

Additional Guidelines for IEC Hot Standby

8.3	Efficiency Tips

Introduction

Purpose

What’s in this Section?

This section describes efficiency tips for the IEC Hot Standby.

This section contains the following topics:

Topic	Page

Use Constants Instead of Equal Literals	158

Use Constants Instead of Open Inputs	159

Programmed Logic	161

Reduce the Use Of Complex Data Structures	162

840 USE 106 00 January 2003

157

Image 157

Schneider Electric 840 USE 106 0 manual Efficiency Tips, Introduction

Contents

USE 106 Quantum Hot StandbyPage Table of Contents Theory of IEC Hsby Operation Using a Quantum 984 Hsby SystemPlanning a Quantum Hot Standby System Additional Guidelines for IEC Hot Standby Using a Quantum IEC Hot Standby System Maintenance Ethernet Hot Standby Solution Appendix a Com Act Error Patterns Specifications for CHS 110 Hot StandbyAppendix C ProWORX Nxt Configuration Appendix B Fiber Optic Cable GuidePage Procedure Safety InformationImportant Information Persons Schneider Electric All Rights Reserved Please Note At a Glance About the BookValidity Note Related Documents About the Book Purpose Overview of Quantum Hot StandbyWhat’s in this Chapter? Overview of Quantum Hot Standby Introduction 1ControlPurpose What’s in this Section? Description Primary and Standby ControlRole of the CHS Hot Standby Cables See Fiber Optic Cable Guide, p Hardware Components in a Quantum Hot Standby System Topology CHS 110 Hot Standby ModulePanel Controls LED Display Following table shows the five status indicatorsModule 140 CHS 110 Slide Switch KeyswitchUpdate Button Function Modes of Operation 2OperationHsby Modes of Hsby has three Modes of Operation Operation Ignores your action Run ModePrimary unit fails 3Cabling Cable Fiber Optic CableConnections CHS 210 Hot Standby Kit Hsby and IEC Hsby Architecture HsbyQuantum 984 Hot Standby involves Module Version RIO is serviced differently Upgrade PLC firmwareIEC compliant languages FBD, LD, SFC, IL and ST Hsby system Fiber Optic CHS Link 5HPRWRUJUDWHU Overview Standby This chapter contains the following topics Theory of 984 Ladder Logic Hsby Operation How a 984 Hsby System Works Primary Rack Scan System Scan TimeSolve Segment Scan PLC to CHS Data Scan Time Increase table belowTransfer Rate Leads to the following results Scan Time Increase Table in PLC Scan Times, p Example Time State RAM Transfer and Scan Time Theory of 984 Hsby Operation Automatic Default Transfer AreaTransfer Primary to the Standby controller on every scan Example Customizing Options Alternatives to the default transfer areaCustom State Area Up using multiple scans to transfer all the data Setting upCustom Scans Custom Scans Theory of 984 Hsby Operation Theory of IEC Hsby Operation Definitions IEC Hot Standby DefinitionsFollowing are IEC Hot Standby definitions IEC runtime system Currently used IEC Heap Size and the Maximum IEC Heap Size IEC HeapProgram Data Online -- Memory Statistics IEC Theory How an IEC Hsby System WorksProgram. There are three steps in the transfer process State RAM Defined System Scan Time Primary Rack Transfer diagram The following shows a transfer diagramStandby Rack Following result Time Scan Time Increase Table belowIEC Scan Time Increase IEC Scan Time Increase Table See Overall PLC Scan Time, p State Ram Transfer and Scan Time Configured for IEC Hsby Transferred RAM LayoutStandby’s IEC data consistency Theory of IEC Hsby Operation Planning a Quantum Hot Standby System Primary Guidelines for Planning a Hot Standby SystemControllers Positioning Safety Precautions Electrical Safety Precautions Remote I/O Cable Topologies Configuration Single Cable ConfigurationSingle Cable Dual Cable Standby system Dual Cable ConfigurationStandby PLC Primary PLC How to Install a Hot Standby System InstallationProcedure Installing a Hot Designation Set to B Slide Switches SettingBattery has been disconnected for at least five minutes Damage Network Following diagram illustrates the network connections Step Aligning Key Locking Ring Diagram Converting to You need backplanes with at least four slots Adding Hot Using a Quantum 984 Hsby System Using a Quantum 984 Hsby System 1Configuration CHS Configuring 984 HsbyModsoft Controlling Installed into your applicationSystem by CHS Instruction Hot Standby System by Configuration ExtensionExtension System CHS Instruction Execute Hsby Unconditionally Enable CommandHsby System Active Using the CHS Instruction Block Hot Standby Command Register Hazard Using CHS Instruction Block Command Register Nontransfer Area Within the State RAM Transfer Status Register Elements of the Nontransfer Area CHS module Configuration Zoom Screen Zoom screen of CHS InstructionScreens must be identical to those in the CHS block Status Register Hot Standby Status RegisterBits in the Hot Standby Status Register Reverse Transfer Registers Reverse Reverse Transfer Logic ExampleTransfer Logic Segment 000813 Using a Quantum 984 Hsby System Using Configuration Extension Concept shown Dialog Standby Concept Hot Standby Dialog Commandsystem Register Bits in the Hot Standby Command Register Hot Standby Command Register Hazard Keyswitch Override Hazard Keyswitch Override and Run ModeRun Override Software Control Example Power up the system again. Download the new configurationOption Mismatch Hazard Standby on Logic Mismatches Modbus Plus SwitchoverPort Address Swapping at Transfer All Transfer All State RAMTransferred if this check box is activated Check box Nontransfer Area Status Register for Configuration extension Hot Standby Status Register for Configuration Extension Advanced Advanced Options Additional RAM State RAM dialog Defining the Transfer Area of State RAM 12K Option Dialog User Defined Option State RAM Transfer Transfer Additional State RAM Hazard Transferring Additional State RAM Data 101 Data Type Scan TransfersBegins again, sending the first 512 additional registers 4Operation Preconditions Starting the System Starting Your Hot Standby SystemStep Action RIO Head Ready FaultStandby Backplane Clock Synchronizing Time-of-Day ClocksSynchronization Network 1 of Segment Following diagram shows synchronizing time-of-day clocksNetwork 2 of Segment While Your System Is Running This chapter presents operating procedures for the IEC Hsby Using a Quantum IEC Hot Standby System Using a Quantum IEC Hot Standby System This section describes Quantum IEC Hot Standby configuration Loading the Software @1SE V196 @2I7 Concept Loadables Installation Screen@2IE V196 V208 Standby controller executes the logic of segment IEC Logic in a Extensions UsingTransfer from Primary to Standby Loadables are removed from the project automatically Hot Standby Dialog Standby Dialog Activation of HotConcept 2.5 shown Standby Command Register Specifying the Command RegisterSpecify Register is Enable it Hot Standby Command RegisterRange Register. However Software Enable Keyswitch OverrideControl Example Option Options forSoftware Control Stage Description Comment Advanced Options Concept Exec Upgrade Without Stopping Application Stopped Cancel Stopping the process System Executive Upgrade Procedure Standby on Logic Mismatch Map / Configuration HazardLogic Mismatch For Concept Logic Project global data that is updated includes Data that do not exist on both controllers is not updatedUpdating Project Global Data Is also Swapping Addresses at Switchover NOE 771 cannot be controlled, it is always activated IP AddressMatter if they reside in the Standby or Primary rack Standby Backplanes State RAM Using a Quantum IEC Hot Standby System Nontransfer Area of State RAM 4nnnnn Supported only with Concept 2.5 or higher Controllers Memory Partition Diagram below shows a PLC Memory PartitionRegisters Shows how the number of IEC Hsby Registers can be modified State RAM Size State RAM Size Section Transfer Control Section Transfer Control FBD Select Component of Type Bool Preconditions 5OperationStarting Regardless of its designation as a or B CHS 110 RIO Head 140 Normal Operation IEC State RAM Memory/Scantime optimizationMap 142 Memory Prediction Screenshot of the Memory Prediction dialog is shown below Statistics MemoryFor IEC Hot Standby data Synchronizing Time of Day Clocks Monitoring Constant InternalRegular Data Transfers Additional Guidelines for IEC Hot Standby Additional Guidelines for IEC Hot Standby General Application Requirements Assessing Memory SavingsExisting IEC Applications Memory Following screen shows memory statistics Statistics Memory Statistics 152 Optimization Needed to achieve it IEC Applications Efficient Use of State RAM Configured StateRAM Registers IEC Application Efficient UseAnything else Data Efficiency Tips RealB RealC RealD Use Constants Instead of Equal LiteralsRealF RealG RealH Use Constants Instead of Open Inputs 160 Programmed Logic Reduce the Use Of Complex Data Structures Solution Ethernet Hot Standby Solution Solution Overview of Hot Standby Solution for NOEsPlease Note Service NOE 771 Drop Hot Standby Topology Device can be assigned the configured IP + 1 address NOE Configuration and Hot StandbyTo download a project to the PLC IP Address Assignment ConfiguringTransparency Secondary Mode Primary ModeStandalone Mode Offline Mode CPU is stopped Offline Mode at Power-up Sequence table Effects on IP Address assignment and Ethernet servicesAddress Assignment Services Power-UpEffects on the Ethernet services Ethernet Information AdditionalGoing to Offline IP Address Assignment and Going Offline Address Swap Times Service Typical Swap Time Maximum Swap TimeConnections Browsers Network Effects of Hot Standby SolutionRemote Connection Request during Hot Standby Swap Hot Standby Swap during Remote Connection Request Scanning ServicePublish Subscribe 176 Maintenance Maintenance Health of a Hot Standby System Health Messages Verifying Health of a Hot Standby System Recognizing Additional Checks Or equipment damage SafetyAvoid Damage to Application I/O Devices Errors Startup Errors Troubleshooting Communications ErrorsInterface Errors LEDs Board Level Error 140 CHS 110 Board Level ErrorsReplace the faulty CHS 110 module 10.3 Failures Main Detecting Failures in a Hot Standby SystemComponents Backplane Detecting Failures in the Primary Backplane Standby module and RIO head to the chart belowController CHS RIO Head Failure Type Description Controller CHS RIO Head Failure Description Detecting Failures in the Standby Backplane 191 Replacement Replacing a Hot Standby Module ReplacementPrimary Backplane Hazard Battery Hazard Changing the Program and Performing a Program UpdateUpdating Standby Ogic Standby controller Off Line Program Change HazardBefore You Begin Controller as well Updating Standby Procedure Amber Standby indicator begins to blink Updating Standby Updating PLC System Executives in a 984 Hsby System While Hot Steps to Upgrade Zoom or RDE PLC executivesStandby is Running Updating PLC System Executives in an IEC Hsby System Forcing a Switchover TestingSwitchover Forcing a Manually Take the following steps to force a switchover manually After Taking the Primary Controller Offline Primary Standby Bringing the Original Primary Unit Back Online Register, p Through Specifications Specifications for CHS 110 Hot StandbySpecifications for CHS 110 Hot Standby Specifications for CHS 110 Hot Standby At a Glance AppendicesIncluded here Appendix contains the following chapters Appendices Purpose What’s in this Chapter? Com Act Error Patterns CHS 110 Error CHS 110 Hot Standby Module Error PatternsNumber Blinks Code Error Patterns Error Patterns The following table shows error patterns CRP Remote I/O Head Processor Error PatternsNumber Code Error Blinks 212 Fiber Optic Cable Guide Recommen ConnectorsDations Suggested Tools include Other Tools Other Tools ProWORX Nxt Hot Standby Configuration Extension ProWORX Nxt ConfigurationMenu and select Hsby Extension from the Tree Control Hot Standby Qua Dialog Screen Functions FieldHot Standby Quantum dialog screen Parameters of a Quantum Hot Standby system Status Registers Dialog screen Initial Command RegisterStatus Register Registers dialog screen Offline state Index Numerics Index Automatic, 108 swapping addresses 226