State Industries GFK-0827 manual RUN/ENABLED Locrdy Locact Remrdy Remact

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Following are several examples that illustrate the above guidelines. Each example gives the role of each unit, its current operating mode, and the state of the LEDs on the RCMs. An X indicates that the corresponding LED and %S bit is ON.

A. Role switches allowed on both units.

Primary Unit		Secondary Unit
Active		Backup
RUN/ENABLED		RUN/ENABLED
X OK		X OK
X	LOC_RDY	X	LOC_RDY
X	LOC_ACT		LOC_ACT
X	REM_RDY	X	REM_RDY
	REM_ACT	X	REM_ACT

B. Role switches allowed on both units.

Primary Unit		Secondary Unit
Active		Backup
RUN/DISABLED		RUN/ENABLED
X OK		X OK
	LOC_RDY	X	LOC_RDY
X	LOC_ACT		LOC_ACT
X	REM_RDY		REM_RDY
	REM_ACT	X	REM_ACT

Note that the Secondary unit drives the outputs in this case.

C. Role switches are not allowed on either unit.

Primary Unit		Secondary Unit
Active		Backup
RUN/ENABLED		RUN/DISABLED
X OK		X OK
X	LOC_RDY		LOC_RDY
X	LOC_ACT		LOC_ACT
	REM_RDY	X	REM_RDY
	REM_ACT	X	REM_ACT

D. Role switches are allowed on both units.

Primary Unit	Secondary Unit
Active	Backup
RUN/DISABLED	RUN/DISABLED
X OK	X OK
LOC_RDY	LOC_RDY
X LOC_ACT	LOC_ACT
REM_RDY	REM_RDY
REM_ACT	X REM_ACT

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Series 90-70 Hot Standby CPU Redundancy User's Guide ± December 1993

GFK-0827

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Contents GE Fanuc Automation GFL±002 Related Publications Content of this ManualWe Welcome Your Comments and Suggestions PrefaceContents Chapter System Components Chapter Configuration Chapter Operation System Operation Fault Detection and Control Actions Synchronized Hot Standby CPU Redundancy System Configuration Contents Hot Standby CPU Redundancy Product Chapter IntroductionGFK-0827 Benefits of the Hot Standby CPU Redundancy Product Features of the Hot Standby CPU Redundancy ProductGenius I/O System Systems for Hot Standby CPU Redundancy SystemsLocal I/O System Cable ConnectionsControl Strategy Basic Hot Standby OperationSynchronized Hot Standby CPU Redundancy System Configuration Redundancy Communications Module Redundancy CPU ModuleSwitch to Backup Unit Time Bumpless SwitchingSynchronized CPUs Effect on Scan TimeOn-Line Repair Configurable Backup Data SizeOn-Line Programming Programming Considerations Configuration RequirementsTerm Definition Definition of TermsAcronym Definition Commonly Used AcronymsRedundancy CPU Chapter System ComponentsCapacities for Redundancy CPU, IC697CPU780 Watchdog TimerCPU Architecture Redundancy CPU IC697CPU CPU FeaturesValid Operating Mode Selection CPU Mode SwitchCPU Status LEDs Memor y Protect KeyswitchBattery Connectors Expansion Memory Boards for CPU Serial Port ConnectorExpansion Memory Board Redundancy Communications Module RCM FeaturesBoard OK RCM System Status LedsUnit Selection Pushbutton RCM ConnectorsBus Transmitter Module LED Status IndicatorsBus Receiver Module BTM ConnectorsGenius Bus Controller Bus Signal TerminationBRM Connectors Genius Bus Controller User Features Racks GBC ConnectorsConfiguring a Hot Standby CPU Redundancy System Chapter ConfigurationLogicmaster 90 Configuration Basic Redundancy System SetupSystem Configuration Redundancy System RequirementsMonitor or Online mode Screens for Fault Category ConfigurationHandling Folders Configuration with LogicmasterConfiguration of a Redundancy CPU Module GFK-0827 Redundant CPU Requirements Background Window Normal Sweep ModeRedund Type Constant Sweep Mode Constant Window Sweep ModeShared I/O Ctrl StrgyFail Wait Shared I/O Reference Values Shared I/O Data ParametersReference Type ReferenceSize CalculationforNumberofBytes Transfer Data SizeConfiguring a CPU Expansion Memory Board Configuration of a Redundancy Communications Module Configuration Paired GBC Parameter Configuration of a Genius Bus ControllerSerial 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 Chapter Operation Power-Up Sequence of a Redundant CPUIncompatible Configurations Resynchronization of the Redundant CPU Hot-Standby Redundancy Control Strategy First Data Transfer %I, %AI and Synchronization Synchronous ScanData Transfer from Backup Unit to Active Unit Second Data Transfer %Q, %AQ, %R, and %M Switching Control to Backup UnitRole Switch Svcreq Definition for% S Reference for Redundancy Status References for CPU RedundancyRedundancy CPU Considerations Differences in Operation for CPU RUN Disabled ModeRUN/ENABLED Locrdy Locact Remrdy Remact Configuration of Fault Actions Background Window Time Stop to RUN Mode TransitionWords per Sweep = Ovrpre %S Reference Timed ContactsGenius Bus Controller Switching Fault Categories Fault DetectionChanging Fault Category Actions Fault Zoom Help Text for Redundancy Error Codes PLC Fault TableFaulting RCMs, Losing Links, and Terminating Communications GFK-0827 Maskable Fault Group Descriptions Fault Actions in a CPU Redundancy SystemUserConfigurable Maskable Fault Group ActionsNon-Maskable Fault Action Descriptions Non-Maskable Fault Group DescriptionsOn-Line Repair Recommendations On-Line RepairMaintaining Parallel Bus Termination Racks Power SupplyCentral Processor Unit Redundancy Communications Module and CablesGenius Bus Controller Redundancy Communications Link FailuresBus Transmitter Module GeniusBlocks Genius BusRedundancy Alternatives Appendix Redundancy AlternativesRedundancy Option Key See Table PLC RedundancyOptionsSeries 90-70 Redundancy Through Application Logic Index Index Index Index Index