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Key Technical Specifications
| Parameter | Value |
|---|---|
| Catalog Number | IC693CPU313 |
| Manufacturer | GE Fanuc / General Electric |
| Product Family | Series 90-30 |
| CPU Type | Embedded Turbo CPU in baseplate |
| Processor | Intel 80188 |
| Processor Speed | 10 MHz |
| Baseplate Format | 5-slot integrated baseplate |
| User Program Memory | 12 KB maximum |
| Register Memory | 2 KB |
| Typical Boolean Execution Speed | 0.6 ms per 1K Boolean logic |
| Discrete I/O Capacity | 160 points maximum |
| Analog Input Capacity | 64%AI words |
| Analog Output Capacity | 32%AQ words |
| Built-In Communication | One serial interface using SNP slave and SNP-X slave protocols |
| Serial Port Location | Connector on the Series 90-30 power supply |
| Floating-Point Math | Not supported |
| Real-Time Clock | Not built in |
| Backplane Consumption | Approximately 430 mA at 5 VDC |
| Operating Temperature | 0–60 °C |
| Expansion Baseplates | Not supported with the embedded CPU base |
| Programming Software | Logicmaster 90 or compatible GE Fanuc programming software |
| Supported Languages | Ladder Logic and Function Block Diagram, subject to firmware/software revision |
The GE Fanuc IC693CPU313 is an embedded Turbo CPU and five-slot baseplate for Series 90-30 PLC systems. It uses a 10 MHz Intel 80188 processor, provides up to 12 KB of user program memory, and executes approximately 1K Boolean logic in 0.6 ms.
This CPU is intended for compact control systems that do not require expansion baseplates. It supports one SNP/SNP-X serial interface through the power supply, but it has no built-in Ethernet port, real-time clock, or floating-point math capability. Verify firmware revision, power supply compatibility, retained logic, and communication requirements before replacement.
IC693CPU313
IC693CPU313
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to This Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| CPU will not power up | Failed power supply, missing rack power, or backplane fault | ✅ High | Measure the power supply input and verify the 5 VDC backplane output | Check the power supply before replacing the CPU baseplate |
| CPU status LED remains stopped | Program fault, memory problem, or invalid configuration | ✅ High | Read the PLC fault table with the programming software | Save diagnostic data and verify program integrity before replacement |
| PLC loses communication with the programmer | Serial cable, power-supply port, baud setting, or CPU fault | ✅ High | Check the serial connector on the power supply and verify SNP/SNP-X settings | Test the cable and port first; the CPU is not the only possible failure point |
| Program disappears after power loss | Volatile memory issue, inadequate backup, or failed CPU memory | ✅ High | Compare the current program with the verified offline backup | Restore only a known-good program and investigate memory retention |
| I/O modules are not recognized | Backplane connector, rack power, or CPU bus fault | ✅ High | Check module LEDs and test a known-good I/O card in the rack | Inspect the baseplate and power supply before replacing individual modules |
| CPU resets during machine operation | Supply sag, electrical noise, watchdog timeout, or program fault | ✅ Medium | Trend the 5 VDC rail and review PLC fault history during the reset | Correct power and program faults before changing the CPU |
| Scan time is excessive | Program size, communication activity, or logic loop | ❌ Low | Monitor scan time and compare it with the 0.6 ms per 1K Boolean reference | Review program execution and communication loading before replacing hardware |
| Expansion baseplate will not communicate | Embedded CPU does not support expansion baseplates | ✅ High | Confirm the CPU catalog number and inspect the system architecture | Use a compatible modular CPU if the application requires expansion |
| Analog values are unavailable | Incorrect %AI/%AQ configuration or unsupported analog module arrangement | ❌ Low | Verify the hardware configuration and monitor the assigned registers | Check module compatibility and addressing before replacing the CPU |
| CPU cannot perform floating-point calculations | Architectural limitation of the CPU313 | ✅ High | Review the application instructions and compiler/programming diagnostics | Use integer scaling or upgrade to a CPU that supports floating-point math |
| Serial data is corrupted | Incorrect SNP/SNP-X settings, cable noise, or incompatible device | ❌ Low | Confirm baud, parity, cable shield, and protocol settings | Correct the serial configuration; do not assume a CPU fault |
If the fault remains unclear, contact technical support with photos of the CPU label, power-supply model, status LEDs, PLC fault table, program backup status, serial configuration, and rack layout.
Frequently Asked Questions (FAQ)
What is the GE Fanuc IC693CPU313?
It is an embedded CPU and baseplate combination for the GE Fanuc Series 90-30 PLC. The CPU is integrated into the rack rather than installed as a removable plug-in processor.
How much program memory does it have?
The IC693CPU313 provides up to 12 KB of user program memory and 2 KB of register memory. Confirm the installed firmware revision because older documentation may list different memory limits for related CPU models.
Can the IC693CPU313 use expansion baseplates?
No. The embedded CPU313 base is intended as a compact, non-expandable rack. If the control system requires additional expansion or remote baseplates, select a compatible modular CPU instead.
Does it support Ethernet or Modbus RTU?
The CPU313 has one serial interface routed through the power supply and supports SNP slave and SNP-X slave protocols. It does not provide native Ethernet, and Modbus RTU requires compatible additional hardware or a protocol gateway.
Does the IC693CPU313 support floating-point math?
No. Floating-point calculations are not supported by this CPU architecture. Use integer scaling where practical or verify that a replacement CPU supports the required arithmetic functions.
Will the PLC program remain during a CPU replacement?
Do not assume it will. Save and verify an offline program backup before removing the CPU baseplate. After replacement, confirm the CPU firmware, hardware configuration, register assignments, and serial settings before reconnecting the machine to automatic operation.
What power supply works with this CPU?
The uses a compatible Series 90-30 power supply installed in the baseplate. Confirm the exact power-supply model and its current capacity against the complete rack load; do not select a supply based only on the CPU current figure.
Why is this CPU cheaper than a current factory controller?
The is a legacy Series 90-30 controller commonly sourced through surplus, used, or refurbished inventory. Confirm the exact condition, firmware revision, battery or memory status, test report, warranty, and return terms before purchase.
