GE 90-70 manual CPU Mode Switch, Port

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CPU Mode Switch

The CPU Mode switch selects the operating mode of the CPU: RUN/ENABLED, RUN/DISABLED, or STOP. The CPU mode can also be controlled from the programmer. However, the CPU Mode switch position restricts the ability of the programmer to put the CPU into certain modes, as shown in the following table.

CPU Mode Switch Position	Allowable Programmer
	Mode Command

Run/Outputs Enabled	Run/Enabled
	Run/Disabled
	Stop

Run/Outputs Disabled	Run/Disabled
	Stop

Stop	Stop

Run/Outputs Enabled Mode

In this mode, the CPU executes all portions of the sweep normally.

Run/Outputs Disabled Mode

In this mode, the CPU executes all portions of the sweep normally, but physical outputs are held in their default state and remain unchanged. Refer to Chapter 4 for important information about Run/Disabled mode in a Hot Standby CPU Redundancy system.

Stop Mode

In Stop mode, the CPU communicates with the programmer and the devices connected to the serial port, communicates with other communications modules such as the ethernet module, and recovers faulted modules. Values in the I/O tables can be changed using the programming computer.

The STOP/IOSCAN mode is not a valid mode in a redundancy system. Refer to Chapter 4 for detailed information.

Port 1

The RJ-11 connector provides an RS-232 compatible serial port.

Port 2

The 15-pin D-connector is an RS-485 compatible serial port.

Port 3

The 15-pin D-connector at the bottom of the module provides an RS-422/RS-485 serial port. For applications requiring RS-232 communications, an RS-232 to RS-422 converter (IC690ACC900) or RS-232 to RS422 miniconverter (IC690ACC901) is available.

Note

An RS-422 Isolated Repeater/RS-232 Converter (IC655CCM590) is available for applications requiring ground isolation where a common ground cannot be established between components.

GFK-1527A

Chapter 2 System Components

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Contents GE Fanuc Automation GFL-002 Related Publications Content of This ManualPreface Preface Contents Contents Chapter Fault Detection Appendix a Cabling Information Introduction Definition of TermsEnhanced Hot Standby CPU Redundancy Using the Redundancy CPU for Non-Redundant Operation Compatibility with CPU780Differences in Operation for Redundancy CPUs Features not Available with Redundancy CPUsRedundancy CPUs as Compared to Other Series 90-70 CPUs Redundant Racks Enhanced Redundancy CPU ModuleRedundancy Communications Module Systems for Enhanced Hot Standby CPU RedundancyCable Connections Genius I/OLocal I/O Enhanced Hot Standby CPU Redundancy System with Local I/O Local I/0 Can beGDB Control Strategy Control StrategiesGHS Control Strategy Output Control with GDB Basic Enhanced Hot Standby OperationOutput Control with GHS Basic CPU Redundancy Setups Single Bus with Preferred Master GHS Control StrategySingle Bus with Floating Master GDB Control Strategy Critical Data + Redundant Outputs TransferredDual Bus with Floating Master GDB Control Strategy Paired GBC = INT/EXT Internal ExternalDuplex CPU Redundancy Online ProgrammingOn-Line Repair System Racks For Installation InstructionsSystem Components Features Redundancy CPUExpansion Memory Board Watchdog TimerCPU Architecture Battery Connectors CPU FeaturesMemory Protect Keyswitch CPU LEDsCPU Mode Switch PortRedundancy Communications Module Unit Select PushbuttonConnector RCM Status LedsBus Transmitter Module Status LEDs ConnectorsBus Transmitter Module Bus Receiver Module Status LEDs Bus Receiver ModuleCables and Termination Genius Bus Controller Location of GBCs and BlocksSingle Bus Genius Networks Dual Bus Genius NetworksBus Controller LEDs One Application Program in Both PLCs Configuration RequirementsProgrammer Connection for Configuration Program Folders in Control Programming SoftwareCPU Configuration Parameters Program Folders in LogicmasterConfiguring Shared I/O References Parameter Default Range DescriptionFinding the Memory Available for Application Program Storage System Communications Window ConsiderationsRack Module Configuration Parameters Bus Controller Configuration ParametersGenius I/O Block Configuration Parameters Normal Operation Powerup of a Redundant CPU Incompatible Configurations Resynchronization of a Redundant CPUGHS Control Strategy GDB Control StrategyReferences for CPU Redundancy Ovrpre %S Reference Not AvailableScan Synchronization Sweep Time SynchronizationOutput Data Transfer to the Backup Unit AT aData Transfer Time Fail Wait TimeGFK-1527A Normal Operation Programming a Data Transfer from Backup Unit to Active Unit Data Transfer ExampleDisabling Data Transfer Copy in Backup Unit Svcreq #43 Command Block for Svcreq #43 Validating the Backup PLCs Logic Solution Backup Qualification with Svcreq #43Validating the Backup PLCs Input Scan Switching Control to the Backup Unit Switching TimesExample 1 Role switches allowed on both units RUN Disabled ModeRUN Disabled Mode for GHS Control Strategy Example 4 Role switches allowed on both units Example 2 Role switches allowed on both unitsExample 3 Role switches not allowed on either unit Backup Active RUN Disabled Mode for GDB Control Strategy Example 8 InvalidFinding the Words to Checksum Each Sweep CGR772 CGR935Finding the Background Window Time Finding the Total Sweep TimeTimed Contacts Timer and PID Function BlocksMiscellaneous Operation Information Multiple I/O Scan SetsDebugger Stop to RUN Mode TransitionSequential Function Chart Programming SFC Background Window TimeGenius Bus Controller Switching Ethernet Global Data in a Redundancy CPU Ethernet Global Data ConsumptionEthernet Global Data Production Sntp TimestampingFault Detection Configuration of Fault ActionsFault Detection PLC Fault Table Messages for Redundancy Message Fault Description Corrective ActionWith redundancy in other fault groups Fault Response Faulting the Redundancy Communications Module Losing a LinkFault Actions in a CPU Redundancy System Configurable Faults Fault Group Type DescriptionNon-Configurable Fault Group Fatal Faults on Both Units in the Same SweepOn-Line Repair On-Line Repair Recommendations Power SupplyMaintaining Parallel Bus Termination RacksRedundancy Communications Link Failures Central Processor UnitRedundancy Communications Module and Cables Genius Bus Controller Single Bus Networks Bus faultsBus Transmitter Module Genius BusDual Bus Networks Genius BlocksIC690CBL714A Multi-drop Cable SpecificationsCabling Information PurposeConnector a Connector A, 15-pin Female Battery connectors Bus Controller, Genius IndexIndex Online programming Online repair Svcreq