GE 90-70 manual Enhanced Redundancy CPU Module, Redundancy Communications Module, Redundant Racks

Page 13

1

Components of the Enhanced Hot Standby Redundancy System

Enhanced Redundancy CPU Module

To utilize the features described in this manual, an Enhanced Redundancy CPU Module (IC697CGR935 or IC697CGR772) must be installed rack 0, slot 1 of both the Primary and Secondary PLCs. Features of the redundancy CPU that are different from conventional CPUS are listed on the previous page.

Redundancy Communications Module

Two Redundancy Communications Modules (RCM) are available that provide a path for sharing data between the two CPUs in the redundant system. Catalog number IC697RCM711 is for use in standard Series 90-70 racks and IC687RCM711, which is for use in dual redundant racks (described below).

The RCM module has a pushbutton switch that can be used to manually switch control from the active unit to the backup unit. The switch between units can also be controlled through the application program logic.

In a synchronized system, I/O data is controlled by only one unit (the active unit) but is shared between both units (active and backup units). The Redundancy Communications Module provides a communications path to synchronize the two CPUs. It also provides the communications path for the transfer of I/O data. An RCM must be located in the main rack of both the Primary PLC and the Secondary PLC, or in both sections of a dual redundant rack.

Redundant Racks

Redundant racks; IC697CHS770 (rear mount) and IC697CHS771 (front mount) have two power supply slots and 12 backplane slots divided into two separate sections, each having a power supply slot and 6 backplane slots. The redundant rack is designed for easy integration of third-party VME modules into a Series 90-70 PLC system. These racks accept all standard Series 90-70 modules and ½ slot VME modules. VME modules require 0.8” spacing and use one slot, while standard Series 90-70 modules use two of the available slots. Cable connection between the required ½ slot RCM modules and the required ½ slot BTM modules (catalog number IC687BEM713) in a redundant rack is through an available 3 foot (0.9 meter) cable, IC697CBL803.

I/O Systems for Enhanced Hot Standby CPU Redundancy

Both Series 90-70 Local I/O and Genius I/O systems can be present in an Enhanced Hot Standby CPU Redundancy system. The two PLCs need not have matching I/O systems -- they may have different numbers of I/O racks, different I/O modules and different option modules.

GFK-1527A

Chapter 1 Introduction

1-5

Page 12 Page 14
Image 13
Page 12 Page 14
Contents GE Fanuc Automation GFL-002 Preface Content of This ManualRelated Publications Preface Contents Contents Chapter Fault Detection Appendix a Cabling Information Definition of Terms IntroductionEnhanced Hot Standby CPU Redundancy Compatibility with CPU780 Using the Redundancy CPU for Non-Redundant OperationRedundancy CPUs as Compared to Other Series 90-70 CPUs Features not Available with Redundancy CPUsDifferences in Operation for Redundancy CPUs Redundancy Communications Module Enhanced Redundancy CPU ModuleRedundant Racks Systems for Enhanced Hot Standby CPU RedundancyLocal I/O Genius I/OCable Connections Local I/0 Can be Enhanced Hot Standby CPU Redundancy System with Local I/OGHS Control Strategy Control StrategiesGDB Control Strategy Output Control with GHS Basic Enhanced Hot Standby OperationOutput Control with GDB Single Bus with Preferred Master GHS Control Strategy Basic CPU Redundancy SetupsCritical Data + Redundant Outputs Transferred Single Bus with Floating Master GDB Control StrategyPaired GBC = INT/EXT Internal External Dual Bus with Floating Master GDB Control StrategyOn-Line Repair Online ProgrammingDuplex CPU Redundancy System Components For Installation InstructionsSystem Racks Redundancy CPU FeaturesCPU Architecture Watchdog TimerExpansion Memory Board Memory Protect Keyswitch CPU FeaturesBattery Connectors CPU LEDsPort CPU Mode SwitchUnit Select Pushbutton Redundancy Communications ModuleRCM Status Leds ConnectorBus Transmitter Module ConnectorsBus Transmitter Module Status LEDs Cables and Termination Bus Receiver ModuleBus Receiver Module Status LEDs Location of GBCs and Blocks Genius Bus ControllerDual Bus Genius Networks Single Bus Genius NetworksBus Controller LEDs Programmer Connection for Configuration Configuration RequirementsOne Application Program in Both PLCs Program Folders in Control Programming SoftwareProgram Folders in Logicmaster CPU Configuration ParametersParameter Default Range Description Configuring Shared I/O ReferencesSystem Communications Window Considerations Finding the Memory Available for Application Program StorageBus Controller Configuration Parameters Rack Module Configuration ParametersGenius I/O Block Configuration Parameters Normal Operation Powerup of a Redundant CPU Resynchronization of a Redundant CPU Incompatible ConfigurationsGDB Control Strategy GHS Control StrategyOvrpre %S Reference Not Available References for CPU RedundancySweep Time Synchronization Scan SynchronizationAT a Output Data Transfer to the Backup UnitFail Wait Time Data Transfer TimeGFK-1527A Normal Operation Data Transfer Example Programming a Data Transfer from Backup Unit to Active UnitDisabling Data Transfer Copy in Backup Unit Svcreq #43 Command Block for Svcreq #43 Validating the Backup PLCs Input Scan Backup Qualification with Svcreq #43Validating the Backup PLCs Logic Solution Switching Times Switching Control to the Backup UnitRUN Disabled Mode for GHS Control Strategy RUN Disabled ModeExample 1 Role switches allowed on both units Example 3 Role switches not allowed on either unit Example 2 Role switches allowed on both unitsExample 4 Role switches allowed on both units Backup Active Example 8 Invalid RUN Disabled Mode for GDB Control StrategyCGR772 CGR935 Finding the Words to Checksum Each SweepFinding the Total Sweep Time Finding the Background Window TimeMiscellaneous Operation Information Timer and PID Function BlocksTimed Contacts Multiple I/O Scan SetsSequential Function Chart Programming SFC Stop to RUN Mode TransitionDebugger Background Window TimeGenius Bus Controller Switching Ethernet Global Data Consumption Ethernet Global Data in a Redundancy CPUSntp Timestamping Ethernet Global Data ProductionConfiguration of Fault Actions Fault DetectionFault Detection Message Fault Description Corrective Action PLC Fault Table Messages for RedundancyWith redundancy in other fault groups Fault Response Losing a Link Faulting the Redundancy Communications ModuleFault Actions in a CPU Redundancy System Fault Group Type Description Configurable FaultsFatal Faults on Both Units in the Same Sweep Non-Configurable Fault GroupOn-Line Repair Maintaining Parallel Bus Termination Power SupplyOn-Line Repair Recommendations RacksRedundancy Communications Module and Cables Central Processor UnitRedundancy Communications Link Failures Bus Transmitter Module Single Bus Networks Bus faultsGenius Bus Controller Genius BusGenius Blocks Dual Bus NetworksCabling Information SpecificationsIC690CBL714A Multi-drop Cable PurposeConnector a Connector A, 15-pin Female Index Battery connectors Bus Controller, GeniusIndex Online programming Online repair Svcreq
Top Page Image Contents