Configuration Requirements | GE 90-70 guide

Chapter

3

Configuration Requirements

This chapter defines the special configuration requirements of an Enhanced Hot Standby CPU Redundancy system.

Programmer Connection for Configuration

In a Hot Standby CPU Redundancy system, one CPU is configured as the Primary CPU and the other as the Secondary CPU. The Primary Unit and the Secondary Unit must be configured separately. The programming device must be connected directly to either the Primary or the Secondary Unit to configure that unit. For a new system, STORE configuration first, then logic.

Secondary Unit					Primary Unit
P C B R G					P C B R G
P C B R G					P C B R G
S P T C B					S P T C B
U M M C					U M M C

30	31
To Programmer	Genius Bus
	Genius Bus

One Application Program in Both PLCs

Although it is not necessary to use the same application program logic for both PLCs, it is difficult to maintain a system that uses two different programs. If the programs are not the same, logic changes made in one system must be hand-keyed into the program folder for the other PLC. Other than visual inspection, there is no way to tell if changes made in one system have been appropriately made in the other.

Program Folders in Control Programming Software

With the Control programming software, a single folder may be used if the logic is identical for both CPUs.

GFK-1527A

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GE 90-70 manual Configuration Requirements, Programmer Connection for Configuration, One Application Program in Both PLCs

Contents

GE Fanuc Automation GFL-002 Preface Content of This ManualRelated 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 Redundancy CPUs as Compared to Other Series 90-70 CPUs Features not Available with Redundancy CPUsDifferences in Operation for Redundancy CPUs Redundant Racks Enhanced Redundancy CPU ModuleRedundancy Communications Module Systems for Enhanced Hot Standby CPU Redundancy Local I/O Genius I/OCable Connections Enhanced Hot Standby CPU Redundancy System with Local I/O Local I/0 Can be GHS Control Strategy Control StrategiesGDB Control Strategy Output Control with GHS Basic Enhanced Hot Standby OperationOutput 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 On-Line Repair Online ProgrammingDuplex CPU Redundancy System Components For Installation InstructionsSystem Racks Features Redundancy CPU CPU Architecture Watchdog TimerExpansion Memory Board Battery Connectors CPU FeaturesMemory Protect Keyswitch CPU LEDs CPU Mode Switch Port Redundancy Communications Module Unit Select Pushbutton Connector RCM Status Leds Bus Transmitter Module ConnectorsBus Transmitter Module Status LEDs Cables and Termination Bus Receiver ModuleBus Receiver Module Status LEDs Genius Bus Controller Location of GBCs and Blocks Single Bus Genius Networks Dual Bus Genius Networks Bus Controller LEDs One Application Program in Both PLCs Configuration RequirementsProgrammer Connection for Configuration 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 Validating the Backup PLCs Input Scan Backup Qualification with Svcreq #43Validating the Backup PLCs Logic Solution Switching Control to the Backup Unit Switching Times RUN 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 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 Timed Contacts Timer and PID Function BlocksMiscellaneous Operation Information Multiple I/O Scan Sets Debugger Stop to RUN Mode TransitionSequential Function Chart Programming SFC 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 On-Line Repair Recommendations Power SupplyMaintaining Parallel Bus Termination Racks Redundancy Communications Module and Cables Central Processor UnitRedundancy Communications Link Failures Genius Bus Controller Single Bus Networks Bus faultsBus Transmitter Module Genius Bus Dual Bus Networks Genius Blocks IC690CBL714A Multi-drop Cable SpecificationsCabling Information Purpose Connector a Connector A, 15-pin Female Battery connectors Bus Controller, Genius Index Index Online programming Online repair Svcreq