User ManualTable of ContentsChapter 1 Introduction12Hot Standby CPU Redundancy Product12Features of the Hot Standby CPU Redundancy Product14Benefits of the Hot Standby CPU Redundancy Product14I/O Systems for Hot Standby CPU Redundancy Systems15Genius I/O System15Local I/O System15Cable Connections15Note15Control Strategy16Basic Hot Standby Operation16Redundancy CPU Module18Redundancy Communications Module18Bumpless Switching19Synchronized CPUs19Effect on Scan Time19Fail Wait Time19Switch to Backup Unit Time19Configurable Backup Data Size20On-Line Programming20On-Line Repair20Programming Considerations21Configuration Requirements21Definition of Terms22Commonly Used Acronyms23Chapter 2 System Components24Redundancy CPU24CPU Architecture25Watchdog Timer25CPU Features26CPU Mode Switch27Memory Protect Keyswitch28CPU Status LEDs28Battery Connectors28Serial Port Connector29Expansion Memory Board29Redundancy Communications Module30RCM Features30RCM System Status LEDS31Unit Selection Pushbutton32RCM Connectors32Bus Transmitter Module33LED Status Indicators33BTM Connectors34Bus Receiver Module34I/O Bus Signal Termination35LED Status Indicators35BRM Connectors35Genius Bus Controller35Genius Bus Controller User Features36LED Status Indicators36GBC Connectors37Racks37Chapter 3 Configuration38Configuring a Hot Standby CPU Redundancy System38Redundancy System Requirements39Basic Redundancy System Setup39Logicmaster 90 Configuration39I/O System Configuration39Screens for Fault Category Configuration40Handling Folders41Configuration with Logicmaster 90-7041Configuration of a Redundancy CPU Module42Redundant CPU Requirements44Redund Type45Background Window45Normal Sweep Mode45Constant Window Sweep Mode46Constant Sweep Mode46Ctrl Strgy47Fail Wait47Shared I/O47Configuring a CPU Expansion Memory Board50Configuration of a Redundancy Communications Module51Configuration of a Genius Bus Controller53Paired GBC Parameter53Serial Bus Address54Configuring a Primary Redundant PLC55Select the Redundancy CPU Module56Select an Expansion Memory Board57Configure the Redundant Communications Module58Configure a Genius Bus Controller59Configure Genius I/O Blocks61Configure the Bus Transmitter Module62Configuring a Secondary Redundant PLC63Change Redund Type64Chapter 4 Operation66Power-Up Sequence of a Redundant CPU66Incompatible Configurations67Resynchronization of the Redundant CPU68Hot-Standby Redundancy Control Strategy69Synchronous Scan70First Data Transfer %I, %AI and Synchronization70Data Transfer from Backup Unit to Active Unit71Second Data Transfer %Q, %AQ, %R, and %M72Switching Control to Backup Unit72Role Switch SVCREQ73%S References for CPU Redundancy74Redundancy CPU Considerations75Features not Available with CPU 78075I/O Interrupts75Timed Interrupts75VME Integrator Racks75STOP/IOSCAN Mode75Flash Operation75Differences in Operation for CPU 78076RUN Disabled Mode76Configuration of Fault Actions78STOP to RUN Mode Transition79Background Window Time79Background User Checksum and Background Window Timing Instructions80Miscellaneous Operation Information81Timer and PID Function Blocks81Timed Contacts81OVR_PRE %S Reference81Genius Bus Controller Switching82Fault Detection83Fault Categories83Changing Fault Category Actions84PLC Fault Table85Faulting RCMs, Losing Links, and Terminating Communications86Fault Actions in a CPU Redundancy System88On-Line Repair91Maintaining Parallel Bus Termination91On-Line Repair Recommendations91Power Supply92Racks92Central Processor Unit92Redundancy Communications Module and Cables92Redundancy Communications Link Failures93Bus Transmitter Module93Genius Bus Controller93Genius Bus94Genius Blocks94Appendix A Redundancy Alternatives95Redundancy Alternatives95Series 90-70 Redundancy Through Application Logic98Index99Size: 684 KBPages: 103Language: EnglishOpen manual
