Features:
- An 80K-word combined allocation gives IC600LX680 the largest capacity in the listed Series Six Plus memory range.
- A 64K logic region accommodates larger ladder and mnemonic programs while 16K words remain available for registers.
- Separate BATTERY LEVEL and PARITY ERROR indications distinguish backup health from stored-word integrity.
The IC600LX680 combines logic, register, and internal operating memory on one CMOS module for the Series Six Plus processor.
Its 64K logic allocation makes this version the higher-capacity choice when an Expanded II program exceeds the 32K logic space of IC600LX648.
Slot 4 places the module beside the Arithmetic Control board, while battery backup preserves volatile contents whenever rack power is unavailable.
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General Electric IC600LX680 80K Combined 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.
Allocating the 80K-word memory
- Logic region: A 64K-word area holds the user ladder program and mnemonic instructions.
- Register region: Sixteen thousand words remain directly accessible for controller data and bit operations.
- Combined total: The two user areas form the 80K-word capacity assigned to IC600LX680.
- Expanded II: The module satisfies the memory requirement for this Series Six Plus function set.
Organizing program and operating data
- Stored programs: Ladder logic and mnemonic instructions occupy the dedicated logic-memory region.
- Working registers: The separate register bank supports user data storage and bit manipulation.
- Controller tables: Internal memory maintains status, transition, override, and scratch-pad information.
- Integrity bits: Each 16-bit logic or register word is accompanied by two parity bits.
Positioning the combined-memory assembly
- Assigned slot: IC600LX680 occupies position 4 in the Series Six Plus CPU rack.
- Board sequence: The memory assembly sits directly to the left of the Arithmetic Control module.
- Front identity: The LOGIC MEMORY faceplate is refitted after the module is fully seated.
- Backplane demand: The rack must reserve the required 5 VDC current for the installed memory board.
Maintaining volatile CMOS contents
- Primary backup: Connect the lithium-manganese dioxide battery before the module is installed.
- Alternate source: An approved external auxiliary battery can maintain memory instead of the internal connection.
- Warning signal: BATTERY LEVEL exposes a weakening backup source before rack power is removed.
- Data risk: Preserve verified controller content before disturbing a depleted or disconnected backup circuit.