NUM C057 NUM 1040 CNC Controller CPU Module

The NUM C057 utilizes a structured memory architecture to separate low-level system operating routines from application-specific control code. The core system operating system is stored in non-volatile REPROM, preserving control functions without requiring continuous external power. Machine tool setup parameters, user PLC sequence files, and axis configurations are loaded into active RAM for execution by the Motorola 68020 processor.

To maintain user sequences and parameter tables during system shutdowns, the RAM relies on an integrated battery backup system with a standard 18-month retention period. Commissioning a replacement unit or swapping CPU modules requires transferring or re-uploading the machine's parameter files and sequence data over the serial interface. Maintaining battery health and verifying parameter integrity are critical steps to prevent loss of machine configuration during prolonged power-down cycles.

System communication on the NUM C057 is driven by dual built-in serial channels engineered for flexible industrial peripheral connection. The primary channel, designated as Com 1, operates using the RS-232E standard for point-to-point data exchange. The secondary serial channel provides multi-protocol flexibility, allowing selection between RS-232E, RS-422A, and RS-485 standards depending on network topology, transmission distance, and peripheral interface requirements.

For machine panel and input/output integration, the C057 features scalable physical I/O connections. Beyond accommodating expansion cards that increase system capacity up to 64 digital inputs and 48 digital outputs, the C057 supports direct interfacing with a NUM 1040 machine panel extension to add 32 digital inputs and 24 digital outputs. Hardware-level signal processing is further augmented by dedicated channels, including one analogue output signal line and one high-priority interrupt input.

When swapping a failed NUM C057 module in a NUM 1040 or NUM 1000 Series rack, hardware part number alignment is essential to ensure rack backplane compatibility. Replacement modules must be configured to match existing hardware selections or jumper settings for the secondary serial port standard (RS-232E, RS-422A, or RS-485) to guarantee communications with external peripheral devices.

Because operational parameters and PLC sequence programs are retained in battery-backed RAM, installers must verify the backup battery condition on the replacement CPU prior to commissioning. An expired or missing RAM backup battery will lead to parameter loss when main power is disconnected. Before placing a replacement unit into full service, technicians should execute a complete parameter restore over the serial interface and verify that digital I/O expansion boards and machine panel extension assignments match the physical machine setup.