Features:
- Combines fixed 16K EPROM code with 16K of additional register RAM.
- Separates nonvolatile application storage from writable process data.
- CPU jumper control makes register-map verification part of replacement.
IC655MEM513 is a dual-resource memory option, so both the fixed program and expanded registers affect operation.
The EPROM portion follows an offline erase/program/verify process, while the register area depends on CPU configuration.
A successful restore proves checksum, register availability, and actual controller function together.
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GE Fanuc IC655MEM513 16K EPROM Memory Module 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.
Separating fixed code from writable registers
- Program section: A 16K EPROM holds the controller application.
- Register section: A separate 16K RAM area expands data storage.
- Different handling: Program and runtime data require distinct backup methods.
- Host configuration: The CPU must expose the intended register range.
Enabling the expanded register map
- Hardware setting: A CPU jumper participates in register expansion.
- Address plan: Application references must match the enabled range.
- Replacement copy: Preserve the original jumper state.
- Fault symptom: Wrong or missing registers can occur with valid logic.
Maintaining the approved fixed application
- Source archive: Keep the authoritative program outside the PLC.
- Checksum label: Identify every programmed device before storage.
- Offline update: Erase and reprogram through the approved process.
- Verification: Compare the finished EPROM with the release image.
Validating both sides of the memory module
- Program identity: Confirm revision and checksum.
- Register access: Test application-critical expanded addresses.
- Initialization: Restore any required starting values.
- Functional run: Complete a controlled PLC sequence.