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Review the NC program around the alarm occurrence point and identify the tool number being called (T-code).

Check the previous tool change commands in the program to verify if the same tool was already loaded.

Modify the NC program to remove redundant tool change sequences or add conditional logic to check active tool before calling M06.

Always backup the original program before making modifications.

Reset the alarm, restart the program from the appropriate block, and verify proper operation without redundant tool calls.

Identify if the alarm occurs within a standard cycle (CYCLE832, drilling cycles, etc.) or custom macro by checking the program stack display.

Access the cycle or macro source code and examine the tool change logic, looking for missing conditional checks on $AC_TOOL or $TC_TP6 system variables.

Modifying manufacturer cycles may void support agreements - create custom versions instead.

Implement conditional tool change logic using IF $AC_TOOL[0] <> desired_tool THEN execute tool change sequence.

Test the modified cycle/macro with the specific tool scenario that triggered the alarm and verify proper conditional operation.

Verify the current tool in the spindle physically and compare with the tool number displayed in the channel status ($AC_TOOL or tool display field).

If restarting mid-program, use block search with calculation (SERUPRO) to ensure system variables synchronize with actual machine state before the restart point.

Block search with calculation may take several minutes on complex programs - do not interrupt this process.

Alternatively, acknowledge the alarm and skip the redundant tool change block, then continue program execution if the correct tool is confirmed loaded.

Only skip tool change commands if you have physically verified the correct tool is in the spindle.

Consider starting from the beginning of the operation or implementing manual tool offset and position synchronization before restart.