State Industries GFK-0827 manual Redundancy System Requirements, Basic Redundancy System Setup

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Redundancy System Requirements

For a redundant CPU configuration using the Hot-Standby Redundancy scheme to be valid, the following requirements must be true in both the Primary Unit and the Secondary Unit in the redundancy system.

HOne configuration must be set to Primary; the other to Secondary.

HThe control strategy configurable parameter must be set to ºGHSº.

HAn RCM must be configured in rack 0 of each system. There can be no empty slots between the RCM and the CPU. For a given unit, the Local RCM is the one configured in that unit; the Remote RCM is not configured by the user, but is automatically configured by the system to be in slot 1 of rack 7.

HAll Genius Bus Controllers in the system must be configured for RED CTRL Redundancy with the redundant pair set for EXTERNAL, or they must be configured for no redundancy.

HIf a Genius Bus Controller is set to redundant in a redundant CPU configuration, all of its bus blocks must also be set redundant; if a Genius Bus Controller is set non-redundant in a redundant CPU configuration, all of its bus blocks must also be set non-redundant.

HIf the primary/secondary configurable item is set to PRIMARY, all Genius Bus Controllers configured for RED CTRL redundancy must have Serial Bus Address 31. If the primary/secondary configurable item is set to SECONDARY, all Genius Bus Controllers configured for RED CTRL redundancy must have Serial Bus Address 30.

HThe Shared I/O selections must match exactly between Primary and Secondary PLCs.

Basic Redundancy System Setup

HAssemble each PLC system and cable the last rack of each system to the RCM of the other PLC using the terminated I/O cable. If there are no expansion racks in the system, cable each BTM to the RCM in the other PLC.

Logicmaster 90 Configuration

HSet the primary CPU to PRIMARY.

HSet the secondary CPU to SECNDARY.

Forboth Primary and Secondary CPUs, do the Following:

HSelect Data Transfer (SHARED I/O) parameters (up to 20 Kbytes Input data, up to 28 Kbytes Output data).

HConfigure the SBA for all Redundancy Genius Bus Controllers (SBA 31 for the Primary; SBA 30 for the Secondary), and Redund Mode to ºRED CTRLº.

HSelect fail-wait time. The default value of 60 ms should suffice for most applications.

HSelect watchdog timer. Allow for worst case scan time plus data transfer time plus two fail-wait times (plus a generous margin). Setting this value too small could cause the standby unit to time out during a failure of the active unit.

HSelect the programmer window. Set to about 10% of the normal scan time (if scan time is unknown, use default time (do not exceed the fail wait time).

HSelect Fault Actions.

I/O System Configuration

HConfigure your I/O system as required for your application.

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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 ProductCable Connections Systems for Hot Standby CPU Redundancy SystemsGenius I/O System Local I/O SystemControl Strategy Basic Hot Standby OperationSynchronized Hot Standby CPU Redundancy System Configuration Redundancy Communications Module Redundancy CPU ModuleEffect on Scan Time Bumpless SwitchingSwitch to Backup Unit Time Synchronized CPUsConfigurable Backup Data Size On-Line ProgrammingOn-Line Repair Programming Considerations Configuration RequirementsTerm Definition Definition of TermsAcronym Definition Commonly Used AcronymsRedundancy CPU Chapter System ComponentsWatchdog Timer CPU ArchitectureCapacities for Redundancy CPU, IC697CPU780 Redundancy CPU IC697CPU CPU FeaturesValid Operating Mode Selection CPU Mode SwitchMemor y Protect Keyswitch Battery ConnectorsCPU Status LEDs Serial Port Connector Expansion Memory BoardExpansion Memory Boards for CPU Redundancy Communications Module RCM FeaturesBoard OK RCM System Status LedsUnit Selection Pushbutton RCM ConnectorsBus Transmitter Module LED Status IndicatorsBus Receiver Module BTM ConnectorsBus Signal Termination BRM ConnectorsGenius Bus Controller Genius Bus Controller User Features Racks GBC ConnectorsConfiguring a Hot Standby CPU Redundancy System Chapter ConfigurationRedundancy System Requirements Basic Redundancy System SetupLogicmaster 90 Configuration System ConfigurationMonitor or Online mode Screens for Fault Category ConfigurationHandling Folders Configuration with LogicmasterConfiguration of a Redundancy CPU Module GFK-0827 Redundant CPU Requirements Normal Sweep Mode Redund TypeBackground Window Constant Sweep Mode Constant Window Sweep ModeCtrl Strgy Fail WaitShared I/O 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 Maintaining Parallel Bus TerminationOn-Line Repair Recommendations Redundancy Communications Module and Cables Power SupplyRacks Central Processor UnitRedundancy Communications Link Failures Bus Transmitter ModuleGenius Bus Controller GeniusBlocks Genius BusRedundancy Alternatives Appendix Redundancy AlternativesRedundancy Option Key See Table PLC RedundancyOptionsSeries 90-70 Redundancy Through Application Logic Index Index Index Index Index
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