Using the Redundancy CPU for Non-Redundant Operation | GE 90-70

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Features of EnhancedT Hot Standby CPU Redundancy

Bumpless switching

Synchronized CPUs

4.7 ms (CGR935), 5.9 ms (CGR772) base sweep time in Run mode

VOne scan switching (in most cases) Configurable backup data size

No single point of failure (excluding Genius I/O blocks and bus stubs)

Redundant backup communications

Online repair of failed component

Online programming

Same or different programs in Primary and Secondary units

Redundancy Communications Module

VManual pushbutton for switching control between active and backup CPUs Five Status LEDs

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

Program control switching

Memory parity and checksums

Common I/O on Genius bus

Genius Dual Bus support

TBackground Diagnostics Memory Protect Keyswitch

Using the Redundancy CPU for Non-Redundant Operation

The Redundancy CPU can be used for both redundant and non-redundant applications. The functionality and performance of a Redundancy CPU configured for standalone operation is the same as for a unit that is configured for redundant operation which has no backup currently available. This includes the redundancy informational messages such as those generated when a unit goes to Run mode. Refer to Chapter 3, "Configuring the Redundancy CPU for Non-redundant Operation."

Compatibility with CPU780

Note that the IC697CGR772 is not compatible with the CPU780. Also, mixing of IC697CGR935 and IC697CGR772 CPUs is not allowed in the same redundant system, since there are several differences between the two models.

GFK-1527A

Chapter 1 Introduction

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GE 90-70 manual Using the Redundancy CPU for Non-Redundant Operation, Compatibility with CPU780

Contents

GE Fanuc Automation GFL-002 Related Publications Content of This ManualPreface Preface Contents Contents Chapter Fault Detection Appendix a Cabling Information Definition of Terms Introduction Enhanced Hot Standby CPU Redundancy Compatibility with CPU780 Using the Redundancy CPU for Non-Redundant Operation Differences in Operation for Redundancy CPUs Features not Available with Redundancy CPUsRedundancy CPUs as Compared to Other Series 90-70 CPUs Systems for Enhanced Hot Standby CPU Redundancy Enhanced Redundancy CPU ModuleRedundancy Communications Module Redundant Racks Cable Connections Genius I/OLocal I/O Local I/0 Can be Enhanced Hot Standby CPU Redundancy System with Local I/O GDB Control Strategy Control StrategiesGHS Control Strategy Output Control with GDB Basic Enhanced Hot Standby OperationOutput Control with GHS Single Bus with Preferred Master GHS Control Strategy Basic CPU Redundancy Setups Critical Data + Redundant Outputs Transferred Single Bus with Floating Master GDB Control Strategy Paired GBC = INT/EXT Internal External Dual Bus with Floating Master GDB Control Strategy Duplex CPU Redundancy Online ProgrammingOn-Line Repair System Racks For Installation InstructionsSystem Components Redundancy CPU Features Expansion Memory Board Watchdog TimerCPU Architecture CPU LEDs CPU FeaturesMemory Protect Keyswitch Battery Connectors Port CPU Mode Switch Unit Select Pushbutton Redundancy Communications Module RCM Status Leds Connector Bus Transmitter Module Status LEDs ConnectorsBus Transmitter Module Bus Receiver Module Status LEDs Bus Receiver ModuleCables and Termination Location of GBCs and Blocks Genius Bus Controller Dual Bus Genius Networks Single Bus Genius Networks Bus Controller LEDs Program Folders in Control Programming Software Configuration RequirementsProgrammer Connection for Configuration One Application Program in Both PLCs Program Folders in Logicmaster CPU Configuration Parameters Parameter Default Range Description Configuring Shared I/O References System Communications Window Considerations Finding the Memory Available for Application Program Storage Bus Controller Configuration Parameters Rack Module Configuration Parameters Genius I/O Block Configuration Parameters Normal Operation Powerup of a Redundant CPU Resynchronization of a Redundant CPU Incompatible Configurations GDB Control Strategy GHS Control Strategy Ovrpre %S Reference Not Available References for CPU Redundancy Sweep Time Synchronization Scan Synchronization AT a Output Data Transfer to the Backup Unit Fail Wait Time Data Transfer Time GFK-1527A Normal Operation Data Transfer Example Programming a Data Transfer from Backup Unit to Active Unit 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 Times Switching Control to the Backup Unit 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 Example 8 Invalid RUN Disabled Mode for GDB Control Strategy CGR772 CGR935 Finding the Words to Checksum Each Sweep Finding the Total Sweep Time Finding the Background Window Time Multiple I/O Scan Sets Timer and PID Function BlocksMiscellaneous Operation Information Timed Contacts Background Window Time Stop to RUN Mode TransitionSequential Function Chart Programming SFC Debugger Genius Bus Controller Switching Ethernet Global Data Consumption Ethernet Global Data in a Redundancy CPU Sntp Timestamping Ethernet Global Data Production Configuration of Fault Actions Fault Detection Fault Detection Message Fault Description Corrective Action PLC Fault Table Messages for Redundancy With redundancy in other fault groups Fault Response Losing a Link Faulting the Redundancy Communications Module Fault Actions in a CPU Redundancy System Fault Group Type Description Configurable Faults Fatal Faults on Both Units in the Same Sweep Non-Configurable Fault Group On-Line Repair Racks Power SupplyMaintaining Parallel Bus Termination On-Line Repair Recommendations Redundancy Communications Link Failures Central Processor UnitRedundancy Communications Module and Cables Genius Bus Single Bus Networks Bus faultsBus Transmitter Module Genius Bus Controller Genius Blocks Dual Bus Networks Purpose SpecificationsCabling Information IC690CBL714A Multi-drop Cable Connector a Connector A, 15-pin Female Index Battery connectors Bus Controller, Genius Index Online programming Online repair Svcreq