Code 14768: Axial auxiliary function for the NCU link cannot be output
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical Axial auxiliary function for the NCU link cannot be output 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
Definitions: Informational alarm for the part program developer. An axial auxiliary function transmi tted via an NCU link cannot be output as the transmission buffer for the PLC is filled up to 100%. Reaction: Alarm display. Warning display. Remedy: In the part program, cyclic data in this case the output of auxilia ry functions for link axes on the interpolating NCU - should be separated with regard to the time. 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 14768 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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