231-9530

Access Machine Operating Mode

Switch to Manual mode by pressing the Manual Operation key. Ensure the control is not in Automatic or Program Run mode.

Disable all axes

In the Machine menu, verify all axis enable indicators are OFF (grey, not green). If any are active, use the axis disable function or ensure the PLC enable signals are deactivated.

On TNC 640 and newer, check the status bar at bottom of screen - all axis indicators should show grey background when disabled.

Verify PLC enable signals

Press MOD key, select PLC > PLC Status. Check markers M4000-M4008 (standard axis enable outputs) to confirm they are all FALSE for the affected axis.

Standard Heidenhain PLC configuration uses M4000+axis_number for enable signals. Custom machine builders may use different markers - check machine documentation.

Attempt configuration again

Return to MOD > System Parameters > Drive Configuration and retry the DRIVE-CLiQ modification with all axes confirmed disabled.

Do not force any configuration changes while this alarm is active - resolve the active state first to prevent drive communication errors.

Clear program selection

Press PGM MGT key, then select 'End Program' or press the END PGM soft key to ensure no NC program is active or selected in memory.

Reset NC interpreter

In Manual or Electronic Handwheel mode, press the NC STOP key followed by the internal STOP soft key to completely halt the NC interpreter and clear all axis reservations.

Check simulation mode status

Verify that Test Run or Program Run Simulation mode is completely exited. Press the Manual Operation key to ensure the control is in a neutral state.

Even in simulation mode, the TNC treats axes as active for safety. Always exit to Manual mode before drive configuration changes.

Perform soft reset

Execute a control reset: Press MOD > System > Control Reset (or press CTRL+A+D keys simultaneously on TNC 640). This clears all NC program contexts without full power cycle.

Perform proper shutdown sequence

Press MOD key, select System > Shutdown. Wait for the 'Power Off' message to appear on screen before proceeding.

Never use emergency stop or main power disconnect for normal shutdowns - this can corrupt axis state data and DRIVE-CLiQ topology information.

Complete power cycle

After proper shutdown message appears, turn off main control power. Wait minimum 30 seconds for all capacitors to discharge and drive modules to fully reset.

For DRIVE-CLiQ systems, the 30-second wait ensures all Siemens drive components complete their internal shutdown and clear their active axis registrations.

Power up and verify

Power on the control and wait for complete boot sequence. Check MOD > Diagnosis > DRIVE-CLiQ Monitor to verify all components show 'Ready' status with no warnings.

Access configuration mode

Enter MOD > System Parameters > Drive Configuration. The alarm should now be cleared and configuration changes should be possible.

Always make DRIVE-CLiQ configuration changes immediately after a clean boot before enabling any axes or running programs.

Access PLC diagnostic screen

Press MOD key, select PLC > PLC Status. Locate the enable output markers for the affected axis (typically M4000-M4008 or custom machine markers).