CPU Mode Switch, Port | GE 90-70 instruction

2

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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Image 26

GE 90-70 manual CPU Mode Switch, Port

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 Terms Enhanced Hot Standby CPU Redundancy Using the Redundancy CPU for Non-Redundant Operation Compatibility with CPU780 Differences 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 Redundancy Cable Connections Genius I/OLocal I/O Enhanced Hot Standby CPU Redundancy System with Local I/O Local I/0 Can be GDB 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 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 Duplex CPU Redundancy Online ProgrammingOn-Line Repair System Racks For Installation InstructionsSystem Components Features Redundancy CPU Expansion Memory Board Watchdog TimerCPU Architecture 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 Status LEDs ConnectorsBus Transmitter Module Bus Receiver Module Status LEDs Bus Receiver ModuleCables and Termination 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 Logic Solution Backup Qualification with Svcreq #43Validating the Backup PLCs Input Scan Switching Control to the Backup Unit Switching Times Example 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 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 Link Failures Central Processor UnitRedundancy Communications Module and Cables 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