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Schneider Electric 840 USE 106 0 manual Additional Guidelines for IEC Hot Standby, At a Glance

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Additional Guidelines for IEC Hot

Standby	8

At a Glance

Purpose	This Chapter discusses optimizing an IEC application to run better in an IEC Hot
	Standby environment, and specifically, how to save data memory. This includes
	existing and newly developed IEC applications.
What’s in this
What’s in this	This chapter contains the following sections:
Chapter?
Chapter?	Section	Topic	Page
	Section	Topic	Page

	8.1	General Application Requirements	149

	8.2	State RAM	155

	8.3	Efficiency Tips	157

840 USE 106 00 January 2003

147

Image 147

Schneider Electric 840 USE 106 0 manual Additional Guidelines for IEC Hot Standby, At a Glance

Contents

USE 106 Quantum Hot StandbyPage Table of Contents Using a Quantum 984 Hsby System Theory of IEC Hsby OperationPlanning a Quantum Hot Standby System Additional Guidelines for IEC Hot Standby Using a Quantum IEC Hot Standby SystemMaintenance Ethernet Hot Standby SolutionAppendix B Fiber Optic Cable Guide Specifications for CHS 110 Hot StandbyAppendix a Com Act Error Patterns Appendix C ProWORX Nxt ConfigurationPage Safety Information ProcedureImportant Information Persons Schneider Electric All Rights Reserved Please NoteRelated Documents About the BookAt a Glance Validity NoteAbout the Book Chapter? Overview of Quantum Hot StandbyPurpose What’s in thisOverview of Quantum Hot Standby 1Control IntroductionPurpose What’s in this Section? Hot Standby Primary and Standby ControlDescription Role of the CHSCables See Fiber Optic Cable Guide, p Hardware Components in a Quantum Hot Standby SystemCHS 110 Hot Standby Module TopologyPanel Controls 140 CHS 110 Following table shows the five status indicatorsLED Display ModuleFunction KeyswitchSlide Switch Update ButtonOperation 2OperationModes of Operation Hsby Modes of Hsby has three Modes of OperationRun Mode Ignores your actionPrimary unit fails 3Cabling Fiber Optic Cable CableConnections CHS 210 Hot Standby Kit Hsby and IEC Hsby Module Version HsbyArchitecture Quantum 984 Hot Standby involvesHsby system Upgrade PLC firmwareRIO is serviced differently IEC compliant languages FBD, LD, SFC, IL and STFiber Optic CHS Link 5HPRWRUJUDWHU Overview StandbyThis chapter contains the following topics Theory of 984 Ladder Logic Hsby OperationHow a 984 Hsby System Works System Scan Time Primary Rack ScanSolve Segment Scan Leads to the following results Scan Time Increase table belowPLC to CHS Data Transfer RateScan Time Increase Table in PLC Scan Times, p ExampleTime State RAM Transfer and Scan TimeTheory of 984 Hsby Operation Default Transfer Area AutomaticTransfer Primary to the Standby controller on every scan Example Area Alternatives to the default transfer areaCustomizing Options Custom StateCustom Scans Setting upUp using multiple scans to transfer all the data Custom ScansTheory of 984 Hsby Operation Theory of IEC Hsby Operation IEC runtime system IEC Hot Standby DefinitionsDefinitions Following are IEC Hot Standby definitionsOnline -- Memory Statistics IEC HeapCurrently used IEC Heap Size and the Maximum IEC Heap Size Program DataState RAM Defined How an IEC Hsby System WorksIEC Theory Program. There are three steps in the transfer processSystem Scan Time Transfer diagram The following shows a transfer diagram Primary RackStandby Rack Time Scan Time Increase Table below Following resultIEC Scan Time Increase IEC Scan Time Increase Table See Overall PLC Scan Time, p State Ram Transfer and Scan Time Configured for IEC Hsby Layout Transferred RAMStandby’s IEC data consistency Theory of IEC Hsby Operation Planning a Quantum Hot Standby System Positioning Guidelines for Planning a Hot Standby SystemPrimary ControllersSafety Precautions Electrical Safety PrecautionsRemote I/O Cable Topologies Single Cable Configuration ConfigurationSingle Cable Primary PLC Dual Cable ConfigurationDual Cable Standby system Standby PLCInstalling a Hot InstallationHow to Install a Hot Standby System ProcedureDamage SettingDesignation Set to B Slide Switches Battery has been disconnected for at least five minutesNetwork Following diagram illustrates the network connectionsStep Aligning Key Locking Ring DiagramConverting to You need backplanes with at least four slots Adding HotUsing a Quantum 984 Hsby System Using a Quantum 984 Hsby System 1Configuration Configuring 984 Hsby CHSModsoft Instruction Installed into your applicationControlling System by CHSSystem Configuration ExtensionHot Standby System by ExtensionExecute Hsby Unconditionally Enable Command CHS InstructionHsby System Active Using the CHS Instruction Block Hot Standby Command Register Hazard Using CHS Instruction BlockCommand Register Nontransfer Area Within the State RAM Transfer Status Register Elements of the Nontransfer AreaCHS module ConfigurationZoom screen of CHS Instruction Zoom ScreenScreens must be identical to those in the CHS block Standby Status Register Hot Standby Status RegisterStatus Register Bits in the HotReverse Transfer Registers Reverse Transfer Logic Example ReverseTransfer Logic Segment 000813 Using a Quantum 984 Hsby System Using Configuration ExtensionConcept shown Dialog Standby Concept Hot Standby DialogCommandsystem Register Bits in the Hot Standby Command RegisterHot Standby Command Register Hazard Override Keyswitch Override and Run ModeKeyswitch Override Hazard RunPower up the system again. Download the new configuration Software Control ExampleOption Mismatch Hazard Standby on Logic MismatchesSwapping at SwitchoverModbus Plus Port AddressCheck box Nontransfer Area Transfer All State RAMTransfer All Transferred if this check box is activatedStatus Register for Configuration extension Hot Standby Status Register for Configuration ExtensionAdvanced Advanced OptionsAdditional RAM State RAM dialog Defining the Transfer Area of State RAM12K Option DialogUser Defined Option State RAM Transfer Transfer Additional State RAM Hazard Transferring Additional State RAM Data101 Scan Transfers Data TypeBegins again, sending the first 512 additional registers 4Operation Starting Your Hot Standby System Preconditions Starting the SystemStep Action Ready Fault RIO HeadStandby Backplane Synchronizing Time-of-Day Clocks ClockSynchronization Following diagram shows synchronizing time-of-day clocks Network 1 of SegmentNetwork 2 of Segment While Your System Is Running This chapter presents operating procedures for the IEC Hsby Using a Quantum IEC Hot Standby SystemUsing a Quantum IEC Hot Standby System This section describes Quantum IEC Hot Standby configuration Loading the Software V208 Concept Loadables Installation Screen@1SE V196 @2I7 @2IE V196Standby controller executes the logic of segment IEC Logic in aLoadables are removed from the project automatically UsingExtensions Transfer from Primary to StandbyHot Standby Dialog Activation of Hot Standby DialogConcept 2.5 shown Register is Specifying the Command RegisterStandby Command Register SpecifyRegister. However Hot Standby Command RegisterEnable it RangeEnable Keyswitch Override SoftwareControl Example Stage Description Comment Options forOption Software ControlAdvanced Options Concept Exec Upgrade Without Stopping Application Stopped CancelStopping the process System Executive Upgrade ProcedureFor Concept Map / Configuration HazardStandby on Logic Mismatch Logic MismatchLogic Global Data Data that do not exist on both controllers is not updatedProject global data that is updated includes Updating ProjectIs also Swapping Addresses at SwitchoverStandby Backplanes IP AddressNOE 771 cannot be controlled, it is always activated Matter if they reside in the Standby or Primary rackState RAM Using a Quantum IEC Hot Standby SystemNontransfer Area of State RAM 4nnnnn Supported only with Concept 2.5 or higher ControllersShows how the number of IEC Hsby Registers can be modified Diagram below shows a PLC Memory PartitionMemory Partition RegistersState RAM Size State RAM SizeSection Transfer Control Section Transfer ControlFBD Select Component of Type Bool Regardless of its designation as a or B 5OperationPreconditions StartingCHS 110 RIO Head 140Normal Operation Memory/Scantime optimization IEC State RAMMap 142 Memory Prediction Screenshot of the Memory Prediction dialog is shown belowMemory StatisticsFor IEC Hot Standby data Synchronizing Time of Day Clocks Transfers Constant InternalMonitoring Regular DataAdditional Guidelines for IEC Hot Standby Additional Guidelines for IEC Hot Standby General Application Requirements Applications Memory SavingsAssessing Existing IECMemory Following screen shows memory statistics Statistics Memory Statistics152 Optimization Needed to achieve it IEC ApplicationsConfigured State Efficient Use of State RAMRAM Registers Data Efficient UseIEC Application Anything elseEfficiency Tips Use Constants Instead of Equal Literals RealB RealC RealDRealF RealG RealH Use Constants Instead of Open Inputs 160 Programmed Logic Reduce the Use Of Complex Data Structures Solution Ethernet Hot Standby SolutionOverview of Hot Standby Solution for NOEs SolutionPlease Note Service NOE 771 Drop Hot Standby TopologyNOE Configuration and Hot Standby Device can be assigned the configured IP + 1 addressTo download a project to the PLC Configuring IP Address AssignmentTransparency Offline Mode CPU is stopped Primary ModeSecondary Mode Standalone ModeAssignment Effects on IP Address assignment and Ethernet servicesOffline Mode at Power-up Sequence table AddressEthernet Power-UpServices Effects on the Ethernet servicesIP Address Assignment and Going Offline AdditionalInformation Going to OfflineService Typical Swap Time Maximum Swap Time Address Swap TimesConnections Hot Standby Swap during Remote Connection Request Network Effects of Hot Standby SolutionBrowsers Remote Connection Request during Hot Standby SwapSubscribe ServiceScanning Publish176 Maintenance Maintenance Health of a Hot Standby System Health Messages Verifying Health of a Hot Standby SystemRecognizing Additional ChecksSafety Or equipment damageAvoid Damage to Application I/O Devices Errors Startup Errors LEDs Communications ErrorsTroubleshooting Interface ErrorsBoard Level Errors Board Level Error 140 CHS 110Replace the faulty CHS 110 module 10.3 Failures Backplane Detecting Failures in a Hot Standby SystemMain ComponentsStandby module and RIO head to the chart below Detecting Failures in the Primary BackplaneController CHS RIO Head Failure Type Description Controller CHS RIO Head Failure Description Detecting Failures in the Standby Backplane191 Replacement Replacement Replacing a Hot Standby ModulePrimary Backplane Hazard Standby Ogic Changing the Program and Performing a Program UpdateBattery Hazard UpdatingBegin Controller as well Program Change HazardStandby controller Off Line Before YouUpdating Standby Procedure Amber Standby indicator begins to blink Updating Standby Updating PLC System Executives in a 984 Hsby System Steps to Upgrade Zoom or RDE PLC executives While HotStandby is Running Updating PLC System Executives in an IEC Hsby System Take the following steps to force a switchover manually TestingForcing a Switchover Switchover Forcing a ManuallyAfter Taking the Primary Controller Offline Primary StandbyBringing the Original Primary Unit Back Online Register, p ThroughSpecifications for CHS 110 Hot Standby SpecificationsSpecifications for CHS 110 Hot Standby Specifications for CHS 110 Hot Standby Appendix contains the following chapters AppendicesAt a Glance Included hereAppendices Purpose What’s in this Chapter? Com Act Error PatternsPatterns CHS 110 Hot Standby Module Error PatternsCHS 110 Error Number Blinks Code ErrorCRP Remote I/O Head Processor Error Patterns Error Patterns The following table shows error patternsNumber Code Error Blinks 212 Fiber Optic Cable Guide Connectors RecommenDations Suggested Tools include Other ToolsOther Tools ProWORX Nxt Configuration ProWORX Nxt Hot Standby Configuration ExtensionMenu and select Hsby Extension from the Tree Control Hot Standby Qua Dialog ScreenParameters of a Quantum Hot Standby system FieldFunctions Hot Standby Quantum dialog screenInitial Command Register Status Registers Dialog screenStatus Register Registers dialog screen Offline state Index Numerics Index Automatic, 108 swapping addresses 226