Code 22005: [Channel %1: ] Spindle %2 selected gear stage %3 not installed
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical [Channel %1: ] Spindle %2 selected gear stage %3 not installed alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Parameters: %1 = Channel number %2 = Spindle number %3 = Gear stage Definitions: The first gear stage data block is active. The requ ired gear stage is not installed in the 1st gear stage data block. The number of installed gear stages is configured in MD35090 $MA_NUM_GEAR_STEPS. Examples for the occurrence of the alar m with 3 gear stages installed (MD35090 $MA_NUM_GEAR_STEPS = 3): *...DO M44 or DO 45 was programmed in syn chronized action for the spindle concerned. *...DO M70 was programmed and MD35014 $MA_GEAR_STEP_USED_IN_AXISMODE was larger than 3. Reaction: NC Start disable in this channel. Interface signals are set. Alarm display. Remedy: Modify part program: Only those valid gear stages can be entered which have also been installed according to MD35090 $MA_NUM_GEAR_STEPS. Limit M70 configuration (MD 35014 $MA_GEAR_STEP_USED_IN_AXISMODE) to MD35090 $MA_NUM_GEAR_STEPS. Program Continuation: Clear alarm with the RESET key. Restart part program
Source: SINUMERIK 840D sl / 840Di sl / SINAMICS S120 Diagnostics Manual (DAsl, 03/2009)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Siemens SINUMERIK 840D CNC Alarms
Siemens controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 22005 on the SINUMERIK 840D CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Siemens's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 4014 Siemens SINUMERIK 840D CNC codes.
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