Code 22022: [Channel %1: ] Block %2 spindle %3 gear stage %4 is expected for axis mode.
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical [Channel %1: ] Block %2 spindle %3 gear stage %4 is expected for axis mode. 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 = Block number, label %3 = Spindle %4 = Gear stage Diagnostics Manual (DAsl), 03/2009 Definitions: The gear stage required for axis mode has not been installed. A gear stage has been configured in MR35014 $MA_GEAR_STEP_USED_IN_AXISMODE, in which the spindle is to be in axis mode. This gear stage is checked whenever the spindle is switched into axis mode. The configured gear stage is compared with the gear stage output by the PLC (NC/PLC interface signal DB31,... DBX16.0. -.2 (Actual gear stage A through C)). This alarm will be output if the gear stages are not the same. Reaction: Interface signals are set. Alarm display. Remedy: Program M70 before the switch to axis mode. The gear stage configured in MD35014 $MA_GEAR_STEP_USED_IN_AXISMOD E is then automatically loaded. No gear stage change is required if the configured gear stage is aleady active. M40 remains active beyond the gear stage change. Consider MD20094 $MC_SPIND_RIGID_TAPPING_M_NR. Program Continuation: Clear alarm with the Delete key or NC START.
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 22022 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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