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Siemens SINUMERIK Controller
Spindle · Intermediate · 30-120 minutes
Siemens 840D 22005 - Channel spindle selected gear stage not installed
Alarm 22005 fires when the NC program or manual intervention commands a spindle gear stage that exceeds the number of physically installed gear stages defined in MD 35090 ($MA_NUM_GEAR_STEPS). The 1st gear stage data block is active, but the selected gear stage number does not exist in the configured machine data.
22005
Siemens 840D 22005 - Channel spindle selected gear stage not installed
Channel spindle selected gear stage not installed
Siemens SINUMERIK 840D alarm 22005: Channel spindle selected gear stage not installed. This alarm indicates a spindle-related fault or programming error on the specified channel. The affected spindle function cannot be executed.
Root Cause Summary
Alarm 22005 fires when the NC program or manual intervention commands a spindle gear stage that exceeds the number of physically installed gear stages defined in MD 35090 ($MA_NUM_GEAR_STEPS). The 1st gear stage data block is active, but the selected gear stage number does not exist in the configured machine data.
Safety
- Refer to Siemens documentation
- Ensure qualified technician performs repairs
Causes and Fixes
- 1
Access Siemens HMI > Diagnosis > Machine Data > search for MD 35090 or $MA_NUM_GEAR_STEPS.
- 2
Verify the current value matches the physically installed gear stages on the spindle drive unit.
- 3
If discrepancy exists, correct MD 35090 to reflect actual gear count and perform a machine reset or NCK initialization.
Requires machine builder authorization; may require safety validation.
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