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Siemens SINUMERIK Controller
Program/G-code · Intermediate · 30-120 minutes
Siemens 840D 104218 - NOTICE! Tool Unload running!
Alarm 104218 is an informational notice indicating that the automatic tool changer (ATC) is actively executing a tool unload operation. This is not an error condition but a status message to inform the operator that the tool unloading cycle is in progress and the system should not be interrupted during this critical phase.
104218
Siemens 840D 104218 - NOTICE! Tool Unload running!
NOTICE! Tool Unload running!
Siemens SINUMERIK operator message 104218: NOTICE! Tool Unload running!. This is an informational message from the SINUMERIK control indicating a system status or operation result that may require operator action.
Root Cause Summary
Alarm 104218 is an informational notice indicating that the automatic tool changer (ATC) is actively executing a tool unload operation. This is not an error condition but a status message to inform the operator that the tool unloading cycle is in progress and the system should not be interrupted during this critical phase.
Safety
- Refer to Siemens documentation
- Ensure qualified technician performs repairs
Causes and Fixes
- 1
Allow the tool unload cycle to complete without interruption. Observe the spindle and magazine for proper tool movement.
- 2
Verify the message clears automatically once the tool is successfully placed in the magazine or intermediate position.
- 3
If the message persists beyond normal cycle time (typically 10-30 seconds), check for mechanical obstructions at the tool gripper or magazine pocket.
Do not open guards or attempt manual intervention while the alarm is active - wait for timeout or emergency stop if needed
- 4
Review the NC program for proper T-code and M06 tool change command syntax if this message appears unexpectedly during program execution.
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Always verify with your machine manual or a certified technician before performing service procedures.