Backup Active | GE 90-70 instruction

4

Example 5: Role switches allowed on both units Secondary Unit Active

Note: Secondary unit active is not a recommended mode of operation when using the GHS Control Strategy.

	Primary Unit	Secondary Unit

Role	Backup	Active

Operating Mode	RUN/ENABLED	RUN/ENABLED

OK LED on RCM	ON	ON

LOC_RDY LED on RCM and %S Bit	ON	ON

LOC_ACT LED on RCM and %S Bit	OFF	ON

REM_RDY LED on RCM and %S Bit	ON	ON

REM_ACT LED on RCM and %S Bit	ON	OFF

Example 6: Role switches not allowed on either unit, Secondary Unit Active

Note: Secondary unit active is not a recommended mode of operation when using the GHS Control Strategy.

	Primary Unit	Secondary Unit

Role	Backup	Active

Operating Mode	RUN/DISABLED	RUN/ENABLED

OK LED on RCM	ON	ON

LOC_RDY LED on RCM and %S Bit	OFF	ON

LOC_ACT LED on RCM and %S Bit	OFF	ON

REM_RDY LED on RCM and %S Bit	ON	OFF

REM_ACT LED on RCM and %S Bit	ON	OFF

Example 7: Role switches allowed on both units, Secondary Unit Active

Note: Secondary unit active is not a recommended mode of operation when using the GHS Control Strategy.

	Primary Unit	Secondary Unit

Role	Backup	Active

Operating Mode	RUN/DISABLED	RUN/DISABLED

OK LED on RCM	ON	ON

LOC_RDY LED on RCM and %S Bit	OFF	OFF

LOC_ACT LED on RCM and %S Bit	OFF	ON

REM_RDY LED on RCM and %S Bit	OFF	OFF

REM_ACT LED on RCM and %S Bit	ON	OFF

GFK-1527A

Chapter 4 Normal Operation

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GE 90-70 manual Backup Active

Contents

GE Fanuc Automation GFL-002 Related Publications Content of This ManualPreface Preface Contents Contents Chapter Fault Detection Appendix a Cabling Information Introduction Definition of Terms Enhanced Hot Standby CPU Redundancy Using the Redundancy CPU for Non-Redundant Operation Compatibility with CPU780 Differences in Operation for Redundancy CPUs Features not Available with Redundancy CPUsRedundancy CPUs as Compared to Other Series 90-70 CPUs Enhanced Redundancy CPU Module Redundancy Communications ModuleRedundant Racks Systems for Enhanced Hot Standby CPU Redundancy Cable Connections Genius I/OLocal I/O Enhanced Hot Standby CPU Redundancy System with Local I/O Local I/0 Can be GDB Control Strategy Control StrategiesGHS Control Strategy Output Control with GDB Basic Enhanced Hot Standby OperationOutput Control with GHS Basic CPU Redundancy Setups Single Bus with Preferred Master GHS Control Strategy Single Bus with Floating Master GDB Control Strategy Critical Data + Redundant Outputs Transferred Dual Bus with Floating Master GDB Control Strategy Paired GBC = INT/EXT Internal External Duplex CPU Redundancy Online ProgrammingOn-Line Repair System Racks For Installation InstructionsSystem Components Features Redundancy CPU Expansion Memory Board Watchdog TimerCPU Architecture CPU Features Memory Protect KeyswitchBattery Connectors CPU LEDs CPU Mode Switch Port Redundancy Communications Module Unit Select Pushbutton Connector RCM Status Leds Bus Transmitter Module Status LEDs ConnectorsBus Transmitter Module Bus Receiver Module Status LEDs Bus Receiver ModuleCables and Termination Genius Bus Controller Location of GBCs and Blocks Single Bus Genius Networks Dual Bus Genius Networks Bus Controller LEDs Configuration Requirements Programmer Connection for ConfigurationOne Application Program in Both PLCs Program Folders in Control Programming Software CPU Configuration Parameters Program Folders in Logicmaster Configuring Shared I/O References Parameter Default Range Description Finding the Memory Available for Application Program Storage System Communications Window Considerations Rack Module Configuration Parameters Bus Controller Configuration Parameters Genius I/O Block Configuration Parameters Normal Operation Powerup of a Redundant CPU Incompatible Configurations Resynchronization of a Redundant CPU GHS Control Strategy GDB Control Strategy References for CPU Redundancy Ovrpre %S Reference Not Available Scan Synchronization Sweep Time Synchronization Output Data Transfer to the Backup Unit AT a Data Transfer Time Fail Wait Time GFK-1527A Normal Operation Programming a Data Transfer from Backup Unit to Active Unit Data Transfer Example Disabling Data Transfer Copy in Backup Unit Svcreq #43 Command Block for Svcreq #43 Validating the Backup PLCs Logic Solution Backup Qualification with Svcreq #43Validating the Backup PLCs Input Scan Switching Control to the Backup Unit Switching Times Example 1 Role switches allowed on both units RUN Disabled ModeRUN Disabled Mode for GHS Control Strategy Example 4 Role switches allowed on both units Example 2 Role switches allowed on both unitsExample 3 Role switches not allowed on either unit Backup Active RUN Disabled Mode for GDB Control Strategy Example 8 Invalid Finding the Words to Checksum Each Sweep CGR772 CGR935 Finding the Background Window Time Finding the Total Sweep Time Timer and PID Function Blocks Miscellaneous Operation InformationTimed Contacts Multiple I/O Scan Sets Stop to RUN Mode Transition Sequential Function Chart Programming SFCDebugger Background Window Time Genius Bus Controller Switching Ethernet Global Data in a Redundancy CPU Ethernet Global Data Consumption Ethernet Global Data Production Sntp Timestamping Fault Detection Configuration of Fault Actions Fault Detection PLC Fault Table Messages for Redundancy Message Fault Description Corrective Action With redundancy in other fault groups Fault Response Faulting the Redundancy Communications Module Losing a Link Fault Actions in a CPU Redundancy System Configurable Faults Fault Group Type Description Non-Configurable Fault Group Fatal Faults on Both Units in the Same Sweep On-Line Repair Power Supply Maintaining Parallel Bus TerminationOn-Line Repair Recommendations Racks Redundancy Communications Link Failures Central Processor UnitRedundancy Communications Module and Cables Single Bus Networks Bus faults Bus Transmitter ModuleGenius Bus Controller Genius Bus Dual Bus Networks Genius Blocks Specifications Cabling InformationIC690CBL714A Multi-drop Cable Purpose Connector a Connector A, 15-pin Female Battery connectors Bus Controller, Genius Index Index Online programming Online repair Svcreq