Document Outline

• Chapter 1 Introduction
  • Hot Standby CPU Redundancy Product
    • Features of the Hot Standby CPU Redundancy Product
    • Benefits of the Hot Standby CPU Redundancy Product
    • I/O Systems for Hot Standby CPU Redundancy Systems
    • Genius I/O System
    • Local I/O System
    • Cable Connections
    • Note
    • Control Strategy
  • Basic Hot Standby Operation
    • Redundancy CPU Module
    • Redundancy Communications Module
    • Bumpless Switching
    • Synchronized CPUs
    • Effect on Scan Time
    • Fail Wait Time
    • Switch to Backup Unit Time
    • Configurable Backup Data Size
    • On-Line Programming
    • On-Line Repair
    • Programming Considerations
    • Configuration Requirements
  • Definition of Terms
  • Commonly Used Acronyms
• Chapter 2 System Components
  • Redundancy CPU
    • CPU Architecture
    • Watchdog Timer
    • CPU Features
    • CPU Mode Switch
    • Memory Protect Keyswitch
    • CPU Status LEDs
    • Battery Connectors
    • Serial Port Connector
    • Expansion Memory Board
  • Redundancy Communications Module
    • RCM Features
    • RCM System Status LEDS
    • Unit Selection Pushbutton
    • RCM Connectors
  • Bus Transmitter Module
    • LED Status Indicators
    • BTM Connectors
  • Bus Receiver Module
    • I/O Bus Signal Termination
    • LED Status Indicators
    • BRM Connectors
  • Genius Bus Controller
    • Genius Bus Controller User Features
    • LED Status Indicators
    • GBC Connectors
  • Racks
• Chapter 3 Configuration
  • Configuring a Hot Standby CPU Redundancy System
  • Redundancy System Requirements
    • Basic Redundancy System Setup
    • Logicmaster 90 Configuration
    • I/O System Configuration
  • Screens for Fault Category Configuration
  • Handling Folders
  • Configuration with Logicmaster 90-70
  • Configuration of a Redundancy CPU Module
    • Redundant CPU Requirements
    • Redund Type
    • Background Window
    • Normal Sweep Mode
    • Constant Window Sweep Mode
    • Constant Sweep Mode
    • Ctrl Strgy
    • Fail Wait
    • Shared I/O
    • Configuring a CPU Expansion Memory Board
  • Configuration of a Redundancy Communications Module
  • Configuration of a Genius Bus Controller
    • Paired GBC Parameter
    • Serial 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
    • Configure Genius I/O Blocks
    • Configure the Bus Transmitter Module
  • Configuring a Secondary Redundant PLC
    • Change Redund Type
• Chapter 4 Operation
  • Power-Up Sequence of a Redundant CPU
    • Incompatible Configurations
  • Resynchronization of the Redundant CPU
  • Hot-Standby Redundancy Control Strategy
  • Synchronous Scan
    • First Data Transfer %I, %AI and Synchronization
    • Data Transfer from Backup Unit to Active Unit
    • Second Data Transfer %Q, %AQ, %R, and %M
    • Switching Control to Backup Unit
    • Role Switch SVCREQ
  • %S References for CPU Redundancy
  • Redundancy CPU Considerations
    • Features not Available with CPU 780
    • I/O Interrupts
    • Timed Interrupts
    • VME Integrator Racks
    • STOP/IOSCAN Mode
    • Flash Operation
    • Differences in Operation for CPU 780
    • RUN Disabled Mode
    • Configuration of Fault Actions
    • STOP to RUN Mode Transition
    • Background Window Time
    • Background User Checksum and Background Window Timing Instructions
    • Miscellaneous Operation Information
    • Timer and PID Function Blocks
    • Timed Contacts
    • OVR_PRE %S Reference
    • Genius Bus Controller Switching
  • Fault Detection
  • Fault Categories
    • Changing Fault Category Actions
    • PLC Fault Table
    • Faulting RCMs, Losing Links, and Terminating Communications
    • Fault Actions in a CPU Redundancy System
  • On-Line Repair
    • Maintaining Parallel Bus Termination
    • On-Line Repair Recommendations
    • Power Supply
    • Racks
    • Central Processor Unit
    • Redundancy Communications Module and Cables
    • Redundancy Communications Link Failures
    • Bus Transmitter Module
    • Genius Bus Controller
    • Genius Bus
    • Genius Blocks
• Appendix A Redundancy Alternatives
  • Redundancy Alternatives
  • Series 90-70 Redundancy Through Application Logic
• Index