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Siemens SINUMERIK Controller
Spindle · Intermediate · 30-120 minutes
Siemens 840D 22070 - TO unit Please change tool into magazine. Repeat data backup
Alarm 22070 occurs during tool management data backup when the NCK detects tools remaining in the buffer magazine (spindle, gripper, or carousel). The system cannot complete the backup operation until all tools are returned to the tool magazine storage locations, as the tool database state would be inconsistent.
22070
Siemens 840D 22070 - TO unit Please change tool into magazine. Repeat data backup
TO unit Please change tool into magazine. Repeat data backup
Siemens SINUMERIK 840D alarm 22070: TO unit Please change tool into magazine. Repeat data backup. This alarm indicates a spindle-related fault or programming error on the specified channel. The affected spindle function cannot be executed.
Root Cause Summary
Alarm 22070 occurs during tool management data backup when the NCK detects tools remaining in the buffer magazine (spindle, gripper, or carousel). The system cannot complete the backup operation until all tools are returned to the tool magazine storage locations, as the tool database state would be inconsistent.
Safety
- Refer to Siemens documentation
- Ensure qualified technician performs repairs
Causes and Fixes
- 1
Check the active tool in spindle: Use Siemens HMI Diagnostics > Tool Management > Current Tool Status. Verify tool %2 location via MD 20060 (TOOL_LOCATION_TABLE).
Do not attempt to force tool extraction while spindle is rotating.
- 2
Execute manual tool change: Navigate to NCK > Manual Operations > Change Tool and physically place tool %2 back into the magazine at its designated slot. Confirm tool ID matches SD 42400 (TOOL_ID) for that slot.
- 3
Verify tool carousel is empty: Check MD 20055 (CAROUSEL_BUFFER_SIZE) and confirm buffer occupation count is zero via system variable $AC_TOOL_IN_SPINDLE.
- 4
Retry data backup: Re-initiate backup through NCK menu System > Backup > Tool Data Backup or set MD 20100 = 1. Confirm backup completes without alarm recurrence.
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