Key Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | IC697CPX928GE1 |
| Manufacturer | GE Fanuc / GE Automation |
| Product Type | Central Processing Unit (CPU) |
| System Compatibility | GE Series 90-70 PLC |
| Processor | 80486DX4 @ 96 MHz |
| Memory | 6MB Battery-Backed RAM + 256KB Flash |
| Max Discrete I/O | 12,288 points |
| Max Analog I/O | 8,192 points |
| Serial Ports | 1x RS232, 2x RS485 |
| Bus Standard | VME C.1 |
| Operating Temp | 0°C to 60°C (forced air) |
| Power Req | 5V DC, 3.1A nominal |
Product Introduction
The GE IC697CPX928GE1 is a high-performance central processing unit designed for the GE Series 90-70 programmable logic controller platform. It serves as the computational core for large-scale industrial automation systems, executing complex control logic, batch processing, and high-speed I/O scanning. This CPU module is engineered for applications requiring substantial memory and extensive I/O capacity, making it a staple in critical infrastructure and heavy manufacturing.Unlike entry-level PLC processors, the GE IC697CPX928GE1 features a 96MHz 80486DX4 microprocessor with 32-bit floating-point capability, achieving a Boolean scan rate of approximately 0.4 microseconds per function. It supports up to 12,288 discrete I/O points and 8,192 analog I/O points, all managed through a standard VME C.1 backplane. The module includes 6MB of battery-backed RAM and 256KB of non-volatile flash memory, ensuring data integrity during power cycles and supporting complex control strategies without external memory expansion.
Installation & Configuration Guide
Preparation (15 min)
Verify the GE IC697CPX928GE1 matches the memory and firmware requirements of your existing system. Gather the appropriate lithium battery (IC697ACC701), a key switch tool, and ESD protection. Self-correction: Always document the current CPU’s firmware version and memory configuration before removal. The 90-70 series has multiple CPU variants, and mixing memory sizes can cause configuration conflicts.Removal (5–10 min)
Switch the CPU key to STOP position and remove power from the rack. Disconnect the serial programming cable and any Ethernet modules. Release the module’s ejector levers and carefully extract the CPU from the VME backplane. Inspect the backplane connectors for bent pins or debris—VME connectors are precision-machined and easily damaged by forced insertion.Installation (10 min)
Align the GE IC697CPX928GE1 with the backplane guide rails. Slide in firmly and evenly until the ejector levers engage. Secure the levers to lock the module. Install a fresh lithium battery if the old one is expired. Reconnect the programming cable and verify the key switch is in the STOP position before applying power.Power-On & Test (15 min)
Apply rack power. Observe the 7 front-panel LED indicators: the RUN LED should illuminate green after the self-test completes. Connect via Logicmaster 90-70 or Proficy Machine Edition and verify the CPU is recognized. Download your existing program or restore from backup. Perform a forced STOP-to-RUN transition and verify I/O scanning is active.
Troubleshooting Quick Reference
| Symptom | Probable Cause | Immediate Action |
|---|---|---|
| No LEDs Illuminated | Backplane power failure or bad seating | Reseat module. Measure 5V DC at backplane. |
| FAULT LED Solid Red | Hardware failure or corrupted memory | Cycle power. If persists, replace CPU. |
| RUN LED Flashing | Program error or watchdog timeout | Connect programming software. Check fault table. |
| Battery LED On | Battery depleted or missing | Replace with IC697ACC701 immediately. |
| Comm Failure | Serial port config or cable fault | Verify baud rate, parity, and cable pinout. |
Dimensions, Mounting & Wiring Notes
- Dimensions: Single-slot VME form factor (~254mm x 147mm x 51mm)
- Mounting: VME C.1 backplane slot with ejector levers
- Terminal Notes: No field wiring. Connections are via front-panel serial ports (RS232/RS485) and optional Ethernet module. Real-world detail: The battery holder is typically located on the front panel near the LEDs. If you see corrosion around the battery contacts, clean with isopropyl alcohol before installing a new battery—corroded contacts can cause intermittent memory loss even with a fresh battery.
FAQ
Is the IC697CPX928GE1 compatible with all 90-70 racks?
Yes, it fits any standard Series 90-70 VME backplane. However, verify that your power supply can deliver the required 3.1A at 5V DC, especially if the rack is fully populated with high-density I/O modules.Can I replace an IC697CPX782 with this module?
Yes, the CPX928 is an upward-compatible replacement for the CPX782. It offers more memory (6MB vs 1MB) and identical I/O capacity. You will need to download your existing program, and the CPU may require a firmware update to match your system configuration.What programming software does this CPU use?
The GE IC697CPX928GE1 is programmed using Logicmaster 90-70 (DOS/Windows) or Proficy Machine Edition (Windows). Both support ladder logic, C, SFC, and State Logic programming languages.How long does the battery last?
The lithium battery (IC697ACC701) typically lasts 3-5 years under normal operating conditions. The front-panel BATT LED illuminates when voltage drops below threshold. Replace immediately when indicated—memory loss occurs within minutes of battery failure.Does this CPU support Ethernet natively?
No. The IC697CPX928GE1 has three serial ports but requires an optional Ethernet module (e.g., IC697CMM002) for TCP/IP communication. The Ethernet module installs in an adjacent slot and communicates via the VME backplane.I replaced the CPU but the program won’t download. What now?
Check the key switch position (must be in STOP or PROG). Verify the serial communication parameters match between the CPU and programming software. If using Ethernet, ensure the optional module is properly configured and the IP address is correct. A corrupted flash memory may require a factory reset via the rear reset port.Is this CPU still supported by GE?
The Series 90-70 platform is in the mature support phase. GE continues to provide spare parts and documentation, but new installations should consider the PACSystems RX3i or RX7i platforms. The IC697CPX928GE1 remains fully functional for existing systems and is widely available through authorized refurbishers.
