Document Outline

• 1785-CHBM ControlNet Hot Backup System User Manual
• Important User Information
• Rockwell Automation Support
  • Your Questions or Comments on this Manual
• Preface
  • Manual Objectives
  • Who Should Use This Manual
  • What This Manual Contains
  • Terms and Conventions
  • Related PLC-5 Publications
  • Related ControlNet Publications
• Summary of Changes
  • New Features and Information
    • Notes
• Table of Contents
• Ch 1 - Backup Concepts for the ControlNet PLC-5 Hot Backup System
  • Chapter Objectives
  • Why Use a Backup System?
  • Basic System Architecture
  • How the Backup System Works
    • Qualification
    • Equivalence Checking
    • Bumpless Transfer
    • Switchover
    • Notes
• Ch 2 - Understanding the ControlNet PLC-5 Hot Backup System Components
  • Chapter Objectives
    • Hardware Components
    • Software Components
    • Firmware Components
  • Summary of Required Hardware, Firmware and Software
  • ControlNet Backup Cartridge
    • Notes
• Ch 3 - Installing and Configuring Your ControlNet PLC-5 Backup System
  • Chapter Objectives
  • Installing the Hardware
  • Configuring Your Backup System
    • Configuring With a Single Control Application
    • Configuring With Differing Applications
  • Advanced Configuration Options
    • Configuring Optional Parameters in a ControlNet Hot Backup System
    • Synchronous and Asynchronous Program Scanning
    • Equivalence Checks
    • Crossloading
    • System Status
    • Crossloading Over Data Highway Plus
  • Requalification of Dual Primary Processors
  • PLC-5 Editing Considerations
    • Downloading Editing Changes
    • Testing Data Table Edits
  • Notes
• Ch 4 - Using I/O in Your ControlNet Hot Backup System
  • Chapter Objectives
  • Considerations when Using I/O
    • Redundant Connections
  • Notes
• Ch 5 - Monitoring and Troubleshooting Your ControlNet PLC-5 Hot Backup System
  • Chapter Objectives
  • ControlNet PLC-5 Backup-Specific Major Fault Error Codes
  • Using the 1785-CHBM Cartridge Status Indicators
  • Troubleshooting the Invalid Backup State
  • Troubleshooting Qualification Major Faults
  • Troubleshooting Qualification Crossloads
  • Troubleshooting with Output Ownership Verification
  • ControlNet Backup Configuration and Status File
  • Notes
• App A - Specifications
  • Specifications
  • Notes
• App B - Backup States
  • Chapter Objectives
    • Invalid Backup State
    • No Control Backup State
    • Primary Backup State
    • Lonely Primary Backup State
    • Secondary Backup State
  • Backup State Transitions
    • Qualification
    • Qualification: From the No Control State to the Primary State
    • Qualification: From the No Control State to the Secondary State
    • Reasons for Qualification Major Fault
    • Switchover
    • Qualified Switchovers
    • Unqualified Switchovers
    • Switchover Considerations
• App C - Data Table Crossloading
  • Chapter Objectives
  • Data Table Crossloading
    • On-Demand Data Table Crossloads
    • Optimizing On-Demand Crossloads
    • Triggering an On-Demand Data Table Crossload
    • Qualification Crossloads
    • Qualification Data Table Crossload
    • Qualification State Data Table Crossload
    • Data Table Crossload Time
    • Data Table Crossload Data Latency
    • Effect of Data Table Crossloading on the ControlNet Channel
    • Inhibiting Data Table Crossloads
    • Data Table Crossload Diagnostics
    • Performing Data Table Crossloads Via Your Applications
• App D - Program Synchronization
  • Chapter Objectives
  • Program Synchronization
    • Determining Which Mode to Use
    • Using Synchronous Mode
    • Determining the Maximum Program Scan Time
    • Adjusted Maximum Program Scan Time
    • Program Scan Overrun
• App E - Application Guidelines
  • Chapter Objectives
  • Redundancy Considerations
  • Switchover Considerations
    • Why Transfer Information?
    • What Information Should Be Transferred?
    • When Should the Information Be Transferred?
    • How Often Should the Information Be Transferred?
    • Performance Considerations
  • Inhibiting or Resetting ControlNet I/O
  • Sequential Process Application Considerations
    • What Causes a ControlNet PLC-5 to Get Into an Incorrect State
    • How to Keep the Hot Backup Programmable Controllers in the Same Process State
    • How to Recover When the Programmable Controllers are in Different Process States
    • How to Complete Qualification in the Same Process State
    • Notes
• App F - Comparison to the 1785-BCM System
  • Chapter Objectives
  • Comparison to the BCM System
• Glossary
• Index
• How Are We Doing Form
• Back Cover