Features:
- Transfers control between redundant PLCs without a process bump.
- Switches to the standby controller within one scan in most cases.
- Supports online programming and repair in redundant operation.
Configurable backup-data size lets
IC697CPU780 synchronize the application state needed by the secondary controller rather than treating the pair as two unrelated CPUs.
Parity checking and processor checksums monitor the attached expansion memory, while status bits and fault tables expose redundancy and hardware symptoms to the control strategy.
Primary and secondary controllers may run the same program or different coordinated programs, with program-controlled or pushbutton transfer available for the redundancy design.
Availability and quotation assistance for General Electric IC697CPU780 16 MHz Hot-Standby CPU is available from Apter Power.
General Electric IC697CPU780 16 MHz Hot-Standby CPU Manuals, Datasheets, Links
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Hardware required around an IC697CPU780 redundancy pair
- Processor pairing: Two IC697CPU780 units are used, one configured as primary and the other as secondary.
- CPU racks: IC697CHS750, IC697CHS790, and IC697CHS791 provide the supported rack environment.
- Redundancy link: Each controller rack uses an IC697RCM711 Redundancy Communications Module.
- Expansion bus: IC697BEM713 connects the CPU rack to compatible Series 90-70 expansion racks.
- Shared I/O: IC660 and IC661 devices can form the common I/O layer seen by both controllers.
Programming connections for primary and secondary IC697CPU780 units
- Serial access: The 15-pin CPU connector provides an RS-485-compatible programming port.
- Signal conversion: IC690ACC900 or IC690ACC901 adapts the CPU interface for an RS-232 workstation connection.
- Parallel access: The upper port on IC697BEM713 supports a parallel programming connection.
- Controller selection: The programmer is moved between racks so primary and secondary configurations are loaded into the intended CPU.
How IC697CPU780 maintains standby readiness
- Synchronization: Controller data is transferred so the backup can assume control with a current operating state.
- Scan impact: Redundancy processing adds approximately 20 ms to the scan under nominal conditions.
- Transfer trigger: Hardware faults, program logic, or the RCM pushbutton can initiate a controller changeover.
- Failure isolation: The architecture removes a single processor as the sole point of control failure.
- Online service: The inactive side can be repaired while the healthy controller continues the application.
Processes that benefit from IC697CPU780 Hot Standby control
- Continuous production: Coordinated primary and secondary PLCs reduce disruption when one controller must leave service.
- Material transfer: Common Genius I/O keeps field states available to the controller that assumes control.
- Process sequencing: Floating-point execution supports calculated process values alongside redundant discrete logic.
- Maintainable automation: Online repair allows planned processor work without shutting down the healthy side of the pair.