Redundancy CPUs as Compared to Other Series 90-70 CPUs | GE

1

Redundancy CPUs as Compared to Other Series 90-70 CPUs

he Redundancy CPU has several differences in operation compared to other Series 90-70 CPUs.

Features not Available with Redundancy CPUs

he following features are not available:

I/O Interrupts: This includes the single edge triggered interrupts from the discrete input modules, the high alarm and low alarm interrupts from the analog input modules, and interrupts from third party VME modules. A program that declares I/O Interrupt triggers cannot be stored to a Redundancy CPU.

Timed Interrupts

VME Integrator Racks.

Stop I/O Scan mode: If an attempt is made to place the PLC in this mode, the PLC will reject the selection and return an error.

Flash operation: User Flash (Store/Load, Verify) as opposed to Flash firmware upgrade

FBCs and FIP I/O

Timed and Event-triggered Programs: Logic that contains Timed or Event-triggered programs cannot be stored.

Microcycle Mode and Periodic Programs

T14-point interrupt module

OVR_PRE %S reference which indicates whether one or more overrides is active

Differences in Operation for Redundancy CPUs

he following features operate differently with the CGR772 or CGR935 than they do with other Series 90-70 CPUs:

RUN/DISABLED mode. This is explained in chapter 4, Operation.

Configuration of Fault Actions

STOP to RUN mode transition

Background Window Time (default is different)

C Debugger

TEthernet Global Data operation is enhanced Rack 7 is not available

1-4

Series 90™-70 Enhanced Hot Standby CPU Redundancy User's Guide – May 2000

GFK-1527A

Image 12

GE manual Redundancy CPUs as Compared to Other Series 90-70 CPUs, Features not Available with Redundancy CPUs

Contents

GE Fanuc Automation GFL-002 Content of This Manual PrefaceRelated Publications 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 Features not Available with Redundancy CPUs Redundancy CPUs as Compared to Other Series 90-70 CPUsDifferences in Operation for Redundancy CPUs Enhanced Redundancy CPU Module Redundancy Communications ModuleRedundant Racks Systems for Enhanced Hot Standby CPU Redundancy Genius I/O Local I/OCable Connections Enhanced Hot Standby CPU Redundancy System with Local I/O Local I/0 Can be Control Strategies GHS Control StrategyGDB Control Strategy Basic Enhanced Hot Standby Operation Output Control with GHSOutput Control with GDB 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 Online Programming On-Line RepairDuplex CPU Redundancy For Installation Instructions System ComponentsSystem Racks Features Redundancy CPU Watchdog Timer CPU ArchitectureExpansion Memory Board CPU Features Memory Protect KeyswitchBattery Connectors CPU LEDs CPU Mode Switch Port Redundancy Communications Module Unit Select Pushbutton Connector RCM Status Leds Connectors Bus Transmitter ModuleBus Transmitter Module Status LEDs Bus Receiver Module Cables and TerminationBus Receiver Module Status LEDs 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 Backup Qualification with Svcreq #43 Validating the Backup PLCs Input ScanValidating the Backup PLCs Logic Solution Switching Control to the Backup Unit Switching Times RUN Disabled Mode RUN Disabled Mode for GHS Control StrategyExample 1 Role switches allowed on both units Example 2 Role switches allowed on both units Example 3 Role switches not allowed on either unitExample 4 Role switches allowed on both units 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 Central Processor Unit Redundancy Communications Module and CablesRedundancy Communications Link Failures 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