10225

Check the current channel state and operating mode (JOG, MDA, AUTO) when the alarm occurred. Review the HMI alarm buffer for the exact timestamp and active program block.

Identify the specific command that was denied by reviewing the NC program line or operator action immediately preceding the alarm. Check for mode change requests, ASUP commands, or system function calls.

Stop the active program execution using RESET or cycle stop. Return the machine to a neutral state (JOG mode or program stop condition).

Ensure workpiece and tooling are in safe positions before issuing RESET.

Re-attempt the command from the appropriate machine state. If programming a mode-dependent function, add proper state checks (e.g., M00, M30) before the command in the NC program.

Check the current protection level and access rights. Navigate to HMI: Services > User Management and verify the logged-in user level (0-7, where 7 is highest access).

Verify keyswitch position on the machine control panel. Ensure it is set to the required position for the intended operation (typically position 3 for full access).

Review PLC signals and interlocks using the PLC diagnostics screen. Check DB21 (interface signals) for any active protection or blockage signals that may inhibit commands.

Log in with appropriate credentials or adjust keyswitch to required position. If programming, encapsulate protected commands within access level checks or remove from unauthorized program sections.

Only authorized personnel should modify protection levels. Document all changes per site procedures.

Check if multiple channels are active and whether synchronization actions (WAITS, SETM, CLEARM) are programmed. Review the NC programs in all active channels for synchronization commands.

Access the channel overview screen (Diagnostics > NCK > Channel Overview) and verify the status of all channels. Look for WAIT states or synchronization holds.

Check for shared axis conflicts by reviewing machine data MD20070 (AXCONF_MACHAX_USED) for each channel. Verify no simultaneous access attempts to the same physical axis.

Release synchronization blocks by executing appropriate SETM commands or resetting the affected channels. Modify NC program logic to properly sequence synchronized operations and eliminate resource conflicts.

Resetting synchronized channels may affect coordinated machining operations. Verify safe machine state before reset.