140-0052

Access MOD Function

Power on control while holding CE key to enter MOD mode. Navigate to File Operations to access system partition.

Working in MOD function can affect critical system files. Document all actions before proceeding.

Verify PLC.SYS Integrity

Navigate to SYS: partition and locate PLC.SYS file. Check file size (should be consistent with machine configuration, typically 50-500 KB). Compare timestamp with last known good operation.

Keep a dated photo or text file documenting original PLC.SYS file size and date from commissioning for quick comparison.

Restore PLC.SYS from Backup

Copy known good PLC.SYS from backup media (USB stick, network location, or TNC:\backup) to SYS: partition. Ensure source file is from same machine and compatible control software version.

Never use PLC.SYS from different machine models - drive configurations are machine-specific.

Perform Cold Restart

Exit MOD function and perform complete power cycle (OFF for minimum 30 seconds). Monitor startup sequence for successful PLC initialization.

Watch for PLC-related messages during boot - successful PLCE load typically shows briefly in startup message area.

Check Software Version History

Press MOD function key, select System Info to view current NC software version. Compare with machine documentation to determine if recent update occurred.

Software build numbers (e.g., 340590 08 SP3) are critical - even service pack changes can affect PLC compatibility.

Contact Machine Builder

Request updated PLC.SYS file compatible with current software version from machine manufacturer. Provide exact control type, software version, and machine serial number.

Never attempt to manually edit PLC.SYS - binary format requires manufacturer tools for proper modification.

Install Updated PLC Configuration

Copy manufacturer-provided PLC.SYS to SYS: partition via MOD function. Verify file transfer completed successfully (compare file sizes).

Always backup existing PLC.SYS to external media with date/version label before replacing.

Verify Drive Parameters Load

After restart, access PLC Programming mode and verify drive configurations loaded correctly. Check axis assignments match physical installation.

Navigate to PLC > Configure > Drive Setup to view loaded PLCE configuration table after successful installation.

Verify Physical Drive Hardware

Check all axis drive modules, encoder interfaces, and expansion cards are properly seated and powered. Verify all diagnostic LEDs on drive modules show normal operation (typically solid green).

Ensure machine is properly locked out and axis power is OFF before inspecting drive hardware.

Check Hardware Configuration Table

In MOD function, navigate to System > Hardware Configuration. Verify all configured drives, encoder interfaces, and modules are detected and show 'OK' status.

Missing or grayed-out modules in hardware table indicate detection failures that will prevent PLCE setup installation.

Compare PLC Setup to Physical Installation

Access PLC configuration through MOD > PLC Programming and review PLCE drive assignment table. Verify each configured axis/spindle matches installed encoder type (EnDat, 1Vpp, resolver, etc.).

Encoder type mismatches are common after hardware replacement - setup expects EnDat but TTL encoder installed, for example.

Update Hardware Detection

Perform hardware auto-detection via MOD > System > Scan Hardware. This forces control to rebuild hardware configuration table based on physically detected components.

Hardware scan may require subsequent PLC.SYS update from machine builder if configuration has legitimately changed.