1005

Check PLC Interface Status

Navigate to Diagnostics > PLC > Interface Signals and verify DB21 (NCK to PLC) and DB20 (PLC to NCK) signal states are correct.

Use the PLC diagnostics screen to monitor real-time signal changes during mode transitions.

Verify NC_START Signal

Check that DB21.DBX1.0 (NC_START) is set to 1 by the PLC program. This signal must be active for mode group initialization.

Never force PLC signals without understanding the safety implications in your specific application.

Examine PLC Program Logic

Review the PLC program for conditions that may prevent setting the NC interface signals, particularly safety interlocks and mode selection logic.

Reset PLC Interface

Perform a PLC reset via Services > PLC > Reset to reinitialize the interface communication between NCK and PLC.

Check Drive Status Display

Navigate to Diagnostics > Drive > Overview to view the status of all drives assigned to the mode group. Look for red status indicators or fault messages.

Use the drive topology view to quickly identify which specific drive in the DRIVE-CLiQ network has issues.

Verify Drive Enable Signals

Check that drive enable signals are active in the PLC interface (typically DB31.DBX for individual axes) and that hardware enable switches are in the correct position.

Examine DRIVE-CLiQ Communication

Go to Diagnostics > Hardware > DRIVE-CLiQ and verify all drives show 'Communication OK' status. Check for loose connections or cable faults.

Clear Drive Faults

Use the drive diagnostics to acknowledge and clear any pending drive faults, then attempt to re-enable the drives through the axis enable function.

Check Mode Group Machine Data

Navigate to Commissioning > Machine Data > Channel and verify MD10000 (number of mode groups) and related mode group assignment parameters are correctly configured.

Compare current machine data with a known good backup to identify configuration changes.

Verify Channel Assignment

Check MD10001-MD10004 (channel assignment to mode groups) to ensure all channels are properly assigned to valid mode groups.

Validate Axis Configuration

Review axis machine data MD30000-MD30999 to confirm all axes referenced by the mode group are properly configured and enabled.

Perform NCK Reset

Execute a warm restart (Services > NCK > Reset > Warm Restart) to reload the machine data configuration after making corrections.

Check Safety Status Display

Navigate to Diagnostics > Safety > Status Overview to view all active safety functions and identify which safety interlock is preventing operation.

Never bypass safety functions without proper authorization and understanding of safety requirements.

Verify Emergency Stop Circuit

Ensure all emergency stop buttons are released and the emergency stop circuit is properly reset through the safety system.

Check Protective Equipment

Verify that all safety doors, light curtains, and protective equipment are in the safe position and providing proper feedback signals.

Reset Safety System

Perform a safety system reset through the designated safety reset button or HMI function after ensuring all safety conditions are met.