Description

GE Fanuc IC697CPU788

I. Basic Information

Model: IC697CPU788

Brand: GE Fanuc

Product Line: High-performance 32-bit PLC central processor for GE Series 90-70 VME bus control system, supporting TMR triple modular redundant architecture. Equipped with dual serial communication ports, large-capacity flash + battery-backed RAM, high-speed floating-point operation capability, it realizes complex process logic control, distributed I/O scheduling, multi-system data interconnection and full-range hardware fault diagnosis, widely deployed in power, petrochemical, metallurgical and other high-reliability industrial safety control projects.

Product Positioning

IC697CPU788 adopts Motorola 68040 32-bit processor with 0.4μs Boolean instruction execution speed, supports up to 8000 analog channels and remote Genius field bus I/O expansion. It can be configured as dual hot standby or triple 2oo3 voting redundant system to meet SIL3 functional safety requirements. Built-in permanent flash program storage and long-term data backup battery greatly improve system data security, serving as the core control spare part for legacy Series 90-70 system renovation and fault replacement.

Hardware Architecture

Single-slot VME flame-retardant PCB with optional conformal three-proof coating, composed of five core functional units: 32-bit high-speed computing unit, dual redundant memory backup unit, dual-channel serial communication unit, hardware self-diagnosis & permission locking unit, VME backplane bus interaction unit. It realizes real-time program scanning, I/O data interaction and fault latch alarm through independent hardware monitoring circuit.

Mounting Specification

Standard single-slot VME rack installation for Series 90-70 control system, compliant with IEC vibration, humidity cycling reliability standards; same-series CPU modules with matching firmware can be directly replaced without primary wiring and configuration modification.

Dimension: 241mm×40mm×140mm, net weight: 1.2kg.

Compatible Systems

Hardware: 90-70 VME rack, redundant power supply, digital/analog I/O modules, Genius remote I/O modules, communication expansion cards, backup lithium battery, shielded communication cables;
Software: Proficy Machine Edition, LogicMaster 90 for programming, online debugging and firmware upgrade;
Upper Platforms: DCS, SCADA, OPC server, SOE fault event management system;
Application Industries: Thermal power, petrochemical ESD safety system, oil & gas pipeline automation, metallurgical process control, waste heat power generation projects.

Product Characteristics

High-speed 32-bit floating-point computing architecture ensures fast response of complex closed-loop control algorithms for continuous industrial production processes.
Dual Flash + battery-backed RAM storage mechanism avoids program and process parameter loss caused by accidental power failure.
Dual hot standby / TMR triple redundant fault-tolerant architecture realizes bumpless system switching under single hardware fault, meeting high-level safety control specifications.
Local + distributed remote I/O flexible expansion and multi-industrial protocol communication capability support large-scale centralized and distributed automation networking.
Full-cycle hardware self-diagnosis and millisecond SOE recording facilitate on-site rapid troubleshooting and post-failure safety accident traceability.
Wide-temperature rugged design with optional conformal coating adapts to harsh industrial environments for long-term unattended stable operation.

II. Technical Specifications

2.1 Electrical Parameters

Power Supply: 5VDC via VME backplane, typical current 1.6A, power consumption 8W
Backup Battery: Replaceable lithium battery, 10-year shelf life, minimum 6-month data retention for RAM
Dielectric Withstand Voltage: 1500VAC 1min for all communication and backplane ports, ±4kV ESD, ±2kV EFT surge protection.

2.2 Computing & Memory Parameters

CPU: 32-bit Motorola 68040 @44MHz, Boolean execution speed 0.4μs/step, hardware floating-point arithmetic
Memory: Standard 512KB expandable to 1MB CMOS RAM, 266KB non-volatile Flash
I/O Capacity: Max 352 local discrete I/O, expandable to 8000 analog channels, deterministic scan cycle configurable from 1~100ms.

2.3 Communication Parameters

Port 1: RS232 for programming & HMI, SNP protocol
Port 2: Configurable RS422/485, Modbus RTU / SNP-X supported
Expansion: Ethernet, Profibus DP, Genius field bus via dedicated communication cards, SNTP time synchronization supported.

2.4 Environmental Specifications

Operating Temperature: 0~60℃ (forced air cooling), 0~40℃ (natural cooling); Storage: -40~85℃
Relative Humidity: 5%~95% non-condensing, vibration resistance IEC 60068-2-6, CE & cUL certified
Protection Class: IP20 for bare board, IP30 installed in sealed metal cabinet, optional conformal coating.

2.5 Mechanical Parameters

Mounting: Standard single-slot VME rack plug-in installation
Dimension: 241mm×40mm×140mm, net weight: 1.2kg
PCB: V0 flame-retardant FR4, optional polyurethane three-proof coating
Interfaces: Dual serial ports, mode key switch, status LEDs, gold-plated VME backplane connector.

III. Key Features

3.1 High-Speed Complex Process Closed-Loop Control

Executes interlock logic, PID regulation, sequence control and mass balance algorithms with short deterministic scan cycles to stabilize process parameters for continuous industrial production.

3.2 Dual Redundant Safe Data Storage

User programs are permanently stored in Flash; real-time operating data is retained by battery-backed RAM to avoid process disturbance caused by unexpected power outage and equipment restart.

3.3 Dual Redundancy & TMR Triple Fault-Tolerant Operation

Supports Genius hot standby and 2oo3 triple modular redundant architecture to achieve seamless fault switching, eliminating safety risks caused by single-point CPU hardware failure in high-risk processes.

3.4 Distributed I/O Expansion & Multi-Protocol Industrial Networking

Realizes long-distance remote I/O deployment through Genius field bus; multi-channel communication interfaces enable seamless data interaction between PLC, DCS, field instruments and upper monitoring systems.

3.5 Full-Range Self-Diagnosis & Millisecond SOE Fault Traceability

Real-time monitoring of hardware, bus and communication operating status with local LED and remote fault alarm; high-precision timestamped event records provide reliable data support for accident analysis and safety compliance audit.

IV. Working Principle

After rack power-on, the CPU completes POST self-test of hardware, bus and communication circuits, loads user programs from Flash to RAM and enters the corresponding operating mode according to the key switch setting. In run mode, the CPU cyclically executes control logic, reads field I/O signals via the VME backplane, outputs control instructions to field actuators, and exchanges operating data with remote devices through serial or extended buses. In redundant configuration, the primary and standby CPUs synchronize programs and real-time variables in real time to realize bumpless takeover upon main unit failure. All fault events and status changes are timestamped and stored, and the backup battery ensures no data loss after power failure.

V. Application Scenarios

Thermal & combined cycle power plants: Turbine boiler interlock control, ETS safety trip protection, plant auxiliary automation and SOE fault sequence recording.
Petrochemical & coal chemical industry: ESD emergency shutdown system and SIL3 safety interlock control for high-risk reaction devices.
Oil & gas long-distance pipeline stations: Compressor anti-surge control, pressure safety cut-off and remote unattended automation monitoring.
Metallurgy, cement and building materials industry: Rolling mill main drive, kiln sequential control and large energy-saving equipment interlock system.
Legacy GE Series 90-70 control system renovation: Plug-and-play CPU replacement compatible with original racks, I/O modules and engineering configurations to shorten equipment outage maintenance duration.