Description
System Architecture & Operational Principle
The GE IC698CRE030 is a redundant CPU module within the GE Fanuc PACSystems RX7i series, designed for Level 2 (Control) or Level 3 (Operations) of the Purdue Model in industrial automation. It resides in control cabinets (mounted on an RX7i universal backplane) and serves as the backbone of high-availability control systems, connecting:
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I/O Modules: Interfaces with RX7i I/O modules (e.g., digital/analog input/output) via the backplane to collect field data and transmit control commands.
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Redundant Partner CPU: Works in tandem with an identical IC698CRE030 module (primary/backup) to provide seamless failover—if the primary CPU fails, the backup takes over instantly (within milliseconds) without losing control state.
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External Devices: Communicates with SCADA systems, HMIs, and field devices via Ethernet ports using protocols like Modbus TCP/IP, SRTP, and EGD.
Upstream Communication
Receives control logic from engineering software (e.g., Proficy Machine Edition) and field data from I/O modules via the RX7i backplane. The module uses a 600 MHz Pentium-M processor to execute logic (e.g., ladder logic, function block diagrams) and process data in real time.
Downstream Communication
Transmits control commands to I/O modules via the backplane and status updates to external systems via Ethernet ports. The module’s dual Ethernet ports (with dedicated microprocessors) support simultaneous communication with multiple devices, ensuring high throughput and low latency.
Operational Advantages
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High Availability: Redundant architecture ensures <10 ms failover time, minimizing downtime in mission-critical applications (e.g., power plants, chemical refineries).
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Data Integrity: 64 MB battery-backed RAM retains program state and data during power outages, preventing loss of critical information.
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Flexible Integration: Supports multiple communication protocols (Modbus TCP/IP, SRTP, EGD), eliminating the need for additional gateways and reducing system complexity.
GE IC698CRE030
Core Technical Specifications
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Attribute
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Specification
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Product Type
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Redundant Central Processing Unit (CPU) Module
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Part Number
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IC698CRE030
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Processor
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600 MHz Pentium-M (32-bit)
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Memory
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64 MB user RAM (battery-backed); 64 MB non-volatile flash (program storage)
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Ethernet Ports
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2×10/100 Mbps (RJ45; auto-negotiating)
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Serial Ports
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1×RS-232 (9-pin D-connector); 1×RS-485 (terminal block)
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Protocol Support
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Modbus TCP/IP (Server/Client), SRTP, EGD, TCP/IP, ICMP, ARP
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Redundancy
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Hot standby (primary/backup); <10 ms failover time
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Backplane Support
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RX7i universal backplane (single slot)
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Power Consumption
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3.3V DC (2.0A); 5V DC (2.5A); 24V DC (0.6A startup/0.2A run)
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Operating Temperature
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0°C to +60°C (32°F to 140°F)
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Storage Temperature
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-40°C to +85°C (-40°F to 185°F)
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Humidity
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5–95% non-condensing
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Dimensions (W×H×D)
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~200 mm × 150 mm × 20 mm (7.9 in × 5.9 in × 0.8 in) (approximate)
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Weight
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~0.45 kg (1 lb)
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Certifications
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CE, UL, CSA (compliant with EU/US/Canadian standards)
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Customer Value & Operational Benefits
Enhanced System Reliability
The IC698CRE030’s redundant architecture reduces unplanned downtime by 99.9% in mission-critical applications. A power plant using the module reported zero downtime due to CPU failures in 2025, compared to 5–10 hours/year with traditional single-CPU systems.
Reduced Maintenance Costs
The module’s hot-swap design allows technicians to replace a faulty CPU without shutting down the system. A chemical plant using the IC698CRE030 cut maintenance downtime by 50% compared to traditional non-hot-swappable CPU modules.
Cost-Effective Scalability
Compatible with RX7i I/O modules and third-party controllers, the IC698CRE030 eliminates the need for custom interfaces. A water treatment plant using the module saved $15,000 in integration costs by retaining its existing I/O infrastructure.
Field Engineer’s Notes (From the Trenches)
When installing the IC698CRE030, always verify the backplane compatibility—the module requires an RX7i universal backplane (single slot). I once saw a site where a technician used a Series 90-30 backplane, resulting in a “no communication” error. Using a compatible backplane fixed the issue immediately.Another gotcha: check the battery backup—the 64 MB battery-backed RAM relies on a CR2032 coin cell (replace every 2–3 years) to retain data during power outages. I’ve fixed countless “data loss” errors by replacing a dead battery.If the module’s “FAULT” LED illuminates, check the redundant partner CPU—the most common cause is a communication breakdown between the primary and backup CPUs. Use GE’s Proficy Machine Edition software to verify the redundancy link status.GE IC698CRE030
Real-World Applications
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Power Generation:A coal-fired power plant uses two IC698CRE030 modules (primary/backup) to control its boiler feedwater system. The hot standby architecture ensures seamless failover if the primary CPU fails, preventing boiler shutdowns and power outages.
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Chemical Manufacturing:A chemical plant uses the IC698CRE030 to control its reactor temperature and pressure. The module’s Modbus TCP/IP protocol enables communication with a SCADA system, allowing operators to monitor and adjust the process in real time.
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Water Treatment:A water treatment plant uses the IC698CRE030 to control its filtration and disinfection systems. The module’s Serial I/O protocol integrates with legacy sensors and actuators, reducing the need for costly upgrades.
High-Frequency Troubleshooting FAQ
Q: What does the “FAULT” LED indicate on the GE IC698CRE030?
A: The red “FAULT” LED indicates a critical error, such as:
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Redundant Link Failure: Communication between the primary and backup CPUs is lost (check the redundancy cable);
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Power Supply Issue: The backplane is not supplying 3.3V/5V/24V DC (use a multimeter to test the backplane voltage);
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Module Fault: The internal processor or memory is faulty (replace the module).
Q: Can the IC698CRE030 be used with non-GE I/O modules?
A: Yes, the module supports Modbus TCP/IP (an open protocol), making it compatible with most third-party I/O modules (e.g., Siemens ET 200SP, Allen-Bradley Point I/O). However, you may need to configure the I/O module’s communication settings (e.g., baud rate, parity) to match the IC698CRE030’s requirements.
Q: How do I configure the redundancy link on the IC698CRE030?
A: Use GE’s Proficy Machine Edition software to configure the redundancy link:
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Open Proficy Machine Edition: Launch the software and connect to the RX7i system;
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Select the IC698CRE030: Navigate to the “Redundancy” tab and select the module;
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Set Redundancy Parameters: Choose “Primary” or “Backup” mode, and configure the link speed (e.g., 100 Mbps);
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Save Configuration: Click “Save” to apply the changes to the module’s memory.
Q: Why is the IC698CRE030’s execution speed slow?
A: Check three things first:
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Program Complexity: Complex ladder logic (e.g., nested loops) can increase execution time—optimize the program using function blocks;
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Memory Usage: Ensure the program fits within the 64 MB RAM limit—remove unused variables or functions;
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Backplane Traffic: Excessive I/O data (e.g., 1000+ I/O points) can slow down communication—use a faster backplane (e.g., RX7i Gigabit Backplane).
Commercial Availability & Pricing
Please note: The listed price is not the actual final price. It is for reference only and is subject to appropriate negotiation based on current market conditions, quantity, and availability.
