Code 16773: [Channel %1: ] Axis %2 is the follow ing axis. The axis/spindle disables of leading axes %3 and %4 differ from one another.
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical [Channel %1: ] Axis %2 is the follow ing axis. The axis/spindle disables of leading axes %3 and %4 differ from one another. 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 = Axis, spindle %3 = Axis, spindle %4 = Axis, spindle Definitions: The axis is active in a coupling as a following axis. The master axes have different states regar ding axis/spindle disable. The alarm can be suppress ed with MD11415 $MN_SUPPRESS_ALARM_MASK_2, bit0 = 1. Reaction: Alarm display. Remedy: Set the same axis/spindle di sable for all master axes. Program Continuation: Alarm display showing cause of alarm disapp ears. No further operator action necessary.
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 16773 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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