State Industries GFK-0827 manual Memor y Protect Keyswitch, CPU Status LEDs, Battery Connectors

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Memor y Protect Keyswitch

The Memory Protect keyswitch is located at the top of the module and has two positions: ON and OFF. This keyswitch is used to manually lock program and configuration data. When the key is in the ºprotectedº (ON) position, program and configuration data can only be changed by a programmer connected for parallel communications with the CPU 780 (that is, to the Bus Transmitter Module).

CPU Status LEDs

There are four LEDs mounted at the top of the CPU board which indicate the current state of the CPU. The normal state of these LEDs when the CPU is running is ON. They are OFF or flashing to indicate special or failure conditions.

OK

The top LED, labeled OK is an indicator of the health of the CPU. It is ON when the CPU is functioning properly. The LED blinks when the CPU executes the power-up diagnostics, when the system has failed, and when the remote unit is powered-up. However, when in this state, the CPU can still communicate with the programmer (the CPU cannot communicate with the programmer during power-up diagnostics) . The LED is OFF when the system has failed and the CPU cannot communicate with the programmer.

RUN

The middle LED, labeled RUN is an indicator of the RUN/STOP status of the CPU. It is ON when the CPU is in the RUN/ENABLE or RUN/DISABLE mode. When the CPU is in the STOP mode, the LED is OFF.

ENABLED

The bottom LED, labeled ENABLED indicates the state of the outputs. This LED is ON when the outputs are enabled, and OFF when the outputs are disabled.

MEM PROTECT

This LED indicates the status of the memory protect keyswitch. When the keyswitch is in the OFF position the LED is OFF, and the CPU can be programmed (if connected for parallel communications, the CPU can be programmed regardless of the keyswitch position). After the program has been verified, the toggle switch for mode selection can be moved to the appropriate mode position. When the memory protect keyswitch is in the ON position, the LED will be ON.

Battery Connectors

Directly below the mode switch are two identical battery connectors. The connector wired to the lithium backup battery cable plugs into one of these connectors to connect the battery to the CMOS memory devices. Two connectors are provided for use when the battery requires replacement. The battery currently installed can remain connected until the new battery is connected, thus minimizing the possibility of losing data.

GFK-0827

Chapter 2 System Components

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Contents GE Fanuc Automation GFL±002 Content of this Manual Related PublicationsPreface We Welcome Your Comments and SuggestionsContents Chapter System Components Chapter Configuration Chapter Operation System Operation Fault Detection and Control Actions Synchronized Hot Standby CPU Redundancy System Configuration Contents Chapter Introduction Hot Standby CPU Redundancy ProductGFK-0827 Features of the Hot Standby CPU Redundancy Product Benefits of the Hot Standby CPU Redundancy ProductSystems for Hot Standby CPU Redundancy Systems Genius I/O SystemLocal I/O System Cable ConnectionsBasic Hot Standby Operation Control StrategySynchronized Hot Standby CPU Redundancy System Configuration Redundancy CPU Module Redundancy Communications ModuleBumpless Switching Switch to Backup Unit TimeSynchronized CPUs Effect on Scan TimeOn-Line Programming Configurable Backup Data SizeOn-Line Repair Configuration Requirements Programming ConsiderationsDefinition of Terms Term DefinitionCommonly Used Acronyms Acronym DefinitionChapter System Components Redundancy CPUCPU Architecture Watchdog TimerCapacities for Redundancy CPU, IC697CPU780 CPU Features Redundancy CPU IC697CPUCPU Mode Switch Valid Operating Mode SelectionBattery Connectors Memor y Protect KeyswitchCPU Status LEDs Expansion Memory Board Serial Port ConnectorExpansion Memory Boards for CPU RCM Features Redundancy Communications ModuleRCM System Status Leds Board OKRCM Connectors Unit Selection PushbuttonLED Status Indicators Bus Transmitter ModuleBTM Connectors Bus Receiver ModuleBRM Connectors Bus Signal TerminationGenius Bus Controller Genius Bus Controller User Features GBC Connectors RacksChapter Configuration Configuring a Hot Standby CPU Redundancy SystemBasic Redundancy System Setup Logicmaster 90 ConfigurationSystem Configuration Redundancy System RequirementsScreens for Fault Category Configuration Monitor or Online modeConfiguration with Logicmaster Handling FoldersConfiguration of a Redundancy CPU Module GFK-0827 Redundant CPU Requirements Redund Type Normal Sweep ModeBackground Window Constant Window Sweep Mode Constant Sweep ModeFail Wait Ctrl StrgyShared I/O Shared I/O Data Parameters Shared I/O Reference ValuesTransfer Data Size Reference Type ReferenceSize CalculationforNumberofBytesConfiguring a CPU Expansion Memory Board Configuration of a Redundancy Communications Module Configuration Configuration of a Genius Bus Controller Paired GBC ParameterSerial 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 Configuration Configure Genius I/O Blocks Configure the Bus Transmitter Module Configuring a Secondary Redundant PLC Change Redund Type GFK-0827 Power-Up Sequence of a Redundant CPU Chapter OperationIncompatible Configurations Resynchronization of the Redundant CPU Hot-Standby Redundancy Control Strategy Synchronous Scan First Data Transfer %I, %AI and SynchronizationData Transfer from Backup Unit to Active Unit Switching Control to Backup Unit Second Data Transfer %Q, %AQ, %R, and %MRole Switch Svcreq References for CPU Redundancy Definition for% S Reference for Redundancy StatusRedundancy CPU Considerations RUN Disabled Mode Differences in Operation for CPURUN/ENABLED Locrdy Locact Remrdy Remact Configuration of Fault Actions Stop to RUN Mode Transition Background Window TimeWords per Sweep = Timed Contacts Ovrpre %S ReferenceGenius Bus Controller Switching Fault Detection Fault CategoriesChanging Fault Category Actions PLC Fault Table Fault Zoom Help Text for Redundancy Error CodesFaulting RCMs, Losing Links, and Terminating Communications GFK-0827 Fault Actions in a CPU Redundancy System Maskable Fault Group DescriptionsMaskable Fault Group Actions UserConfigurableNon-Maskable Fault Group Descriptions Non-Maskable Fault Action DescriptionsMaintaining Parallel Bus Termination On-Line RepairOn-Line Repair Recommendations Power Supply RacksCentral Processor Unit Redundancy Communications Module and CablesBus Transmitter Module Redundancy Communications Link FailuresGenius Bus Controller Genius Bus GeniusBlocksAppendix Redundancy Alternatives Redundancy AlternativesRedundancy Option Key See Table RedundancyOptions PLCSeries 90-70 Redundancy Through Application Logic Index Index Index Index Index
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