State Industries GFK-0827 manual Features of the Hot Standby CPU Redundancy Product

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Features of the Hot Standby CPU Redundancy Product

HBumpless switching h Synchronized CPUs

h 20 millisecond scan extension (nominal). This figure is variable, depending on amount of data transferred.

h One scan switching (in most cases) h Configurable backup data size

HNo single point of failure (excludingGeniusI/O)

HRedundant backup communications

HOn±line repair of failed component

HOn±line programming

HSame or different programs in Primary and Secondary units

HRedundancy CPU has a 16 MHz microprocessor, configurable memory and configurable addressing capacity

HRedundancy Communications Module

h Manual pushbutton switch for switching control between active and backup CPUs

h Five Status LEDs

±Board OK

±Local System Ready

±Local System Active

±Remote System Ready

±Remote System Active

HStatus Bits (%S) reflect redundancy status of Primary/Secondary units

HProgram control switching

HMemory parity and checksums

HCommon I/O on Genius bus

HBackground Diagnostics

±Processor test

±PLC CPU EPROM CRC Validation

±User program checksumming

±Time-of-Day/ElapsedTime Clock test

HMemory Protect Keyswitch

Benefits of the Hot Standby CPU Redundancy Product

Implementation of the Hot Standby CPU Redundancy product provides you with a method of ensuring that a critical control system or process is uninterrupted in the event of a failure of any single component (excluding I/O) of the PLC system.

GFK-0827

Chapter 1 Introduction

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Contents GE Fanuc Automation GFL±002 Content of this Manual Related PublicationsPreface We Welcome Your Comments and SuggestionsContents Chapter System Components Chapter Configuration Chapter Operation System Operation Fault Detection and Control Actions Synchronized Hot Standby CPU Redundancy System Configuration Contents Chapter Introduction Hot Standby CPU Redundancy ProductGFK-0827 Features of the Hot Standby CPU Redundancy Product Benefits of the Hot Standby CPU Redundancy ProductLocal I/O System Systems for Hot Standby CPU Redundancy SystemsGenius I/O System Cable ConnectionsBasic Hot Standby Operation Control StrategySynchronized Hot Standby CPU Redundancy System Configuration Redundancy CPU Module Redundancy Communications ModuleSynchronized CPUs Bumpless SwitchingSwitch to Backup Unit Time Effect on Scan TimeOn-Line Repair Configurable Backup Data SizeOn-Line Programming Configuration Requirements Programming ConsiderationsDefinition of Terms Term DefinitionCommonly Used Acronyms Acronym DefinitionChapter System Components Redundancy CPUCapacities for Redundancy CPU, IC697CPU780 Watchdog TimerCPU Architecture CPU Features Redundancy CPU IC697CPUCPU Mode Switch Valid Operating Mode SelectionCPU Status LEDs Memor y Protect KeyswitchBattery Connectors Expansion Memory Boards for CPU Serial Port ConnectorExpansion Memory Board RCM Features Redundancy Communications ModuleRCM System Status Leds Board OKRCM Connectors Unit Selection PushbuttonLED Status Indicators Bus Transmitter ModuleBTM Connectors Bus Receiver ModuleGenius Bus Controller Bus Signal TerminationBRM Connectors Genius Bus Controller User Features GBC Connectors RacksChapter Configuration Configuring a Hot Standby CPU Redundancy SystemSystem Configuration Basic Redundancy System SetupLogicmaster 90 Configuration Redundancy System RequirementsScreens for Fault Category Configuration Monitor or Online modeConfiguration with Logicmaster Handling FoldersConfiguration of a Redundancy CPU Module GFK-0827 Redundant CPU Requirements Background Window Normal Sweep ModeRedund Type Constant Window Sweep Mode Constant Sweep ModeShared I/O Ctrl StrgyFail Wait Shared I/O Data Parameters Shared I/O Reference ValuesTransfer Data Size Reference Type ReferenceSize CalculationforNumberofBytesConfiguring a CPU Expansion Memory Board Configuration of a Redundancy Communications Module Configuration Configuration of a Genius Bus Controller Paired GBC ParameterSerial Bus Address Configuring a Primary Redundant PLC Select the Redundancy CPU Module Select an Expansion Memory Board Configure the Redundant Communications Module Configure a Genius Bus Controller Configuration Configure Genius I/O Blocks Configure the Bus Transmitter Module Configuring a Secondary Redundant PLC Change Redund Type GFK-0827 Power-Up Sequence of a Redundant CPU Chapter OperationIncompatible Configurations Resynchronization of the Redundant CPU Hot-Standby Redundancy Control Strategy Synchronous Scan First Data Transfer %I, %AI and SynchronizationData Transfer from Backup Unit to Active Unit Switching Control to Backup Unit Second Data Transfer %Q, %AQ, %R, and %MRole Switch Svcreq References for CPU Redundancy Definition for% S Reference for Redundancy StatusRedundancy CPU Considerations RUN Disabled Mode Differences in Operation for CPURUN/ENABLED Locrdy Locact Remrdy Remact Configuration of Fault Actions Stop to RUN Mode Transition Background Window TimeWords per Sweep = Timed Contacts Ovrpre %S ReferenceGenius Bus Controller Switching Fault Detection Fault CategoriesChanging Fault Category Actions PLC Fault Table Fault Zoom Help Text for Redundancy Error CodesFaulting RCMs, Losing Links, and Terminating Communications GFK-0827 Fault Actions in a CPU Redundancy System Maskable Fault Group DescriptionsMaskable Fault Group Actions UserConfigurableNon-Maskable Fault Group Descriptions Non-Maskable Fault Action DescriptionsOn-Line Repair Recommendations On-Line RepairMaintaining Parallel Bus Termination Central Processor Unit Power SupplyRacks Redundancy Communications Module and CablesGenius Bus Controller Redundancy Communications Link FailuresBus Transmitter Module Genius Bus GeniusBlocksAppendix Redundancy Alternatives Redundancy AlternativesRedundancy Option Key See Table RedundancyOptions PLCSeries 90-70 Redundancy Through Application Logic Index Index Index Index Index