GE 90-70 PLC Fault Table Messages for Redundancy, Message Fault Description Corrective Action

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5

PLC Fault Table Messages for Redundancy

The following table lists messages, descriptions, and corrective actions for error codes associated with the redundancy fault group. These error codes can be viewed by selecting Ctrl-F on the corresponding redundancy fault (in Logicmaster 90-70) or double-click on the corresponding fault (in Control). The entire fault data (including these error codes) can also be accessed with a SVC_REQ and other applications that communicate with the CPU.

Error

 

 

 

Code

Message

Fault Description

Corrective Action

1

Primary Unit is Active and

The primary and secondary units have

None required.

 

Secondary Unit is Backup.

switched roles.

 

2

Secondary Unit is Active

The secondary and primary units have

None required.

 

and Primary Unit is

switched roles.

 

 

Backup.

 

 

3

Primary Unit is Active; No

The primary unit has transitioned to RUN

Secondary unit MUST be placed in RUN

 

Backup Unit Available.

mode and is running as a stand-alone unit.

mode with a comparable configuration in

 

 

 

order to have a synchronized system.

 

 

 

 

4

Secondary Unit is Active;

The secondary unit has transitioned to RUN

Primary unit MUST be placed in RUN

 

No Backup Unit Available.

mode and is running as a stand-alone unit.

mode with a comparable configuration in

 

 

 

order to have a synchronized system.

5

Primary Unit Has Failed;

Primary unit has recorded a fatal fault, has

If primary unit has also logged the fault

 

Secondary Unit is Active

been powered down, or has lost ability to

“Secondary Unit Has Failed: Primary Unit

 

w/o Backup.

communicate with the secondary unit while

is Active w/o Backup”, then

 

 

acting as the active or backup unit.

communications has been broken between

 

 

Secondary unit will continue running as a

the two units and must be repaired. If a

 

 

stand-alone unit.

fatal fault has been logged in the primary

 

 

 

unit, the indicated fault must be repaired.

 

 

 

Power may have to be cycled on one of the

 

 

 

units in order to re-establish

 

 

 

communications and return to a

 

 

 

synchronized system.

6

Secondary Unit Has Failed;

Secondary unit has recorded a fatal fault, has

If secondary unit has also logged the fault

 

Primary Unit is Active w/o

been powered down, or has lost ability to

“Primary Unit Has Failed: Secondary Unit

 

Backup.

communicate with the primary unit while

is Active w/o Backup”, then

 

 

acting as the active or backup unit. The

communications has been broken between

 

 

primary unit will continue running as a

the two units and must be repaired. If a

 

 

stand-alone unit.

fatal fault has been logged in the secondary

 

 

 

unit, the indicated fault must be repaired.

 

 

 

Power may have to be cycled on one of the

 

 

 

units in order to re-establish

 

 

 

communications and return to a

 

 

 

synchronized system.

7

Synchronization Failure;

A communications failure between the two

One of the units should be power cycled to

 

Both Units are Active.

units has caused each unit to become stand-

return to a synchronized system. NOTE:

 

 

alone units. Communications has since been

The Genius blocks will respond to the unit

 

 

restored.

that is using Serial Bus Address 31.

8

Unable to Switch

An attempt to switch redundancy roles was

None required.

 

Redundancy Roles

made when it was not possible to perform

 

 

 

the switch.

 

GFK-1527A

Chapter 5 Fault Detection

5-3

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Contents GE Fanuc Automation GFL-002 Preface Content of This ManualRelated Publications Preface Contents Contents Chapter Fault Detection Appendix a Cabling Information Definition of Terms IntroductionEnhanced Hot Standby CPU Redundancy Compatibility with CPU780 Using the Redundancy CPU for Non-Redundant OperationRedundancy CPUs as Compared to Other Series 90-70 CPUs Features not Available with Redundancy CPUsDifferences in Operation for Redundancy CPUs Systems for Enhanced Hot Standby CPU Redundancy Enhanced Redundancy CPU ModuleRedundancy Communications Module Redundant RacksLocal I/O Genius I/OCable Connections Local I/0 Can be Enhanced Hot Standby CPU Redundancy System with Local I/OGHS Control Strategy Control StrategiesGDB Control Strategy Output Control with GHS Basic Enhanced Hot Standby OperationOutput Control with GDB Single Bus with Preferred Master GHS Control Strategy Basic CPU Redundancy SetupsCritical Data + Redundant Outputs Transferred Single Bus with Floating Master GDB Control StrategyPaired GBC = INT/EXT Internal External Dual Bus with Floating Master GDB Control StrategyOn-Line Repair Online ProgrammingDuplex CPU Redundancy System Components For Installation InstructionsSystem Racks Redundancy CPU FeaturesCPU Architecture Watchdog TimerExpansion Memory Board CPU LEDs CPU FeaturesMemory Protect Keyswitch Battery ConnectorsPort CPU Mode SwitchUnit Select Pushbutton Redundancy Communications ModuleRCM Status Leds ConnectorBus Transmitter Module ConnectorsBus Transmitter Module Status LEDs Cables and Termination Bus Receiver ModuleBus Receiver Module Status LEDs Location of GBCs and Blocks Genius Bus ControllerDual Bus Genius Networks Single Bus Genius NetworksBus Controller LEDs Program Folders in Control Programming Software Configuration RequirementsProgrammer Connection for Configuration One Application Program in Both PLCsProgram Folders in Logicmaster CPU Configuration ParametersParameter Default Range Description Configuring Shared I/O ReferencesSystem Communications Window Considerations Finding the Memory Available for Application Program StorageBus Controller Configuration Parameters Rack Module Configuration ParametersGenius I/O Block Configuration Parameters Normal Operation Powerup of a Redundant CPU Resynchronization of a Redundant CPU Incompatible ConfigurationsGDB Control Strategy GHS Control StrategyOvrpre %S Reference Not Available References for CPU RedundancySweep Time Synchronization Scan SynchronizationAT a Output Data Transfer to the Backup UnitFail Wait Time Data Transfer TimeGFK-1527A Normal Operation Data Transfer Example Programming a Data Transfer from Backup Unit to Active UnitDisabling 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 Times Switching Control to the Backup UnitRUN 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 Example 8 Invalid RUN Disabled Mode for GDB Control StrategyCGR772 CGR935 Finding the Words to Checksum Each SweepFinding the Total Sweep Time Finding the Background Window TimeMultiple I/O Scan Sets Timer and PID Function BlocksMiscellaneous Operation Information Timed ContactsBackground Window Time Stop to RUN Mode TransitionSequential Function Chart Programming SFC DebuggerGenius Bus Controller Switching Ethernet Global Data Consumption Ethernet Global Data in a Redundancy CPUSntp Timestamping Ethernet Global Data ProductionConfiguration of Fault Actions Fault DetectionFault Detection Message Fault Description Corrective Action PLC Fault Table Messages for RedundancyWith redundancy in other fault groups Fault Response Losing a Link Faulting the Redundancy Communications ModuleFault Actions in a CPU Redundancy System Fault Group Type Description Configurable FaultsFatal Faults on Both Units in the Same Sweep Non-Configurable Fault GroupOn-Line Repair Racks Power SupplyMaintaining Parallel Bus Termination On-Line Repair RecommendationsRedundancy Communications Module and Cables Central Processor UnitRedundancy Communications Link Failures Genius Bus Single Bus Networks Bus faultsBus Transmitter Module Genius Bus ControllerGenius Blocks Dual Bus NetworksPurpose SpecificationsCabling Information IC690CBL714A Multi-drop CableConnector a Connector A, 15-pin Female Index Battery connectors Bus Controller, GeniusIndex Online programming Online repair Svcreq
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