Memory/Scantime optimization | Schneider Electric 840 USE 106 0

Using a Quantum IEC Hot Standby System

Memory/Scantime optimization

IEC State RAM		An illustration of the IEC State RAM Map.
Map
	State RAM
(compl. xferred)
0x			Header
0x			(Exec vers.,
Total			(Exec vers.,
Total			timing info,...)	prog. data
			timing info,...)

				configured
Total 1x
	forbufferIEC heap		IEC heap
Total 3x	forbufferIEC heap	No. 3x regs	Spaceas big as
		configured for
		IEC HSBY
	Transfer
Total 4x

Program data used

Program data unused

DFB instance data

free memory for addtl. DFB instance data

Safety buffer for future changes/ additions

840 USE 106 00 January 2003

141

Image 141

Schneider Electric 840 USE 106 0 manual Memory/Scantime optimization, IEC State RAM, Map

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 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 Safety Information ProcedureImportant 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 1Control IntroductionPurpose 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 CHS 110 Hot Standby Module TopologyPanel 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 Run Mode Ignores your actionPrimary unit fails 3Cabling Fiber Optic Cable 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 System Scan Time Primary Rack ScanSolve 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 Default Transfer Area AutomaticTransfer 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 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 Primary Guidelines for Planning a Hot Standby SystemControllers Positioning Safety Precautions Electrical Safety Precautions Remote I/O Cable Topologies Single Cable Configuration 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 Configuring 984 Hsby CHSModsoft Controlling Installed into your applicationSystem by CHS Instruction Hot Standby System by Configuration ExtensionExtension System Execute Hsby Unconditionally Enable Command CHS InstructionHsby 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 of CHS Instruction Zoom ScreenScreens 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 Transfer Logic Example ReverseTransfer 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 Power up the system again. Download the new configuration Software Control ExampleOption 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 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 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 Activation of Hot Standby DialogConcept 2.5 shown Standby Command Register Specifying the Command RegisterSpecify Register is Enable it Hot Standby Command RegisterRange Register. However Enable Keyswitch Override SoftwareControl 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 Memory/Scantime optimization IEC State RAMMap 142 Memory Prediction Screenshot of the Memory Prediction dialog is shown below Memory StatisticsFor 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 Configured State Efficient Use of State RAMRAM Registers IEC Application Efficient UseAnything else Data Efficiency 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 Solution Overview of Hot Standby Solution for NOEs SolutionPlease Note Service NOE 771 Drop Hot Standby Topology NOE Configuration and Hot Standby Device can be assigned the configured IP + 1 addressTo download a project to the PLC Configuring IP Address AssignmentTransparency 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 Service Typical Swap Time Maximum Swap Time Address Swap TimesConnections 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 Safety Or equipment damageAvoid Damage to Application I/O Devices Errors Startup Errors Troubleshooting Communications ErrorsInterface Errors LEDs Board Level Errors Board Level Error 140 CHS 110Replace the faulty CHS 110 module 10.3 Failures Main Detecting Failures in a Hot Standby SystemComponents Backplane Standby 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 Backplane 191 Replacement Replacement Replacing a Hot Standby ModulePrimary 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 Steps to Upgrade Zoom or RDE PLC executives While HotStandby 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 for CHS 110 Hot Standby SpecificationsSpecifications 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 CRP 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 Tools Other Tools ProWORX Nxt Configuration ProWORX Nxt Hot Standby Configuration ExtensionMenu 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 Initial Command Register Status Registers Dialog screenStatus Register Registers dialog screen Offline state Index Numerics Index Automatic, 108 swapping addresses 226