Code 207965: <location>Drive: Save required
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical <location>Drive: Save required 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
Message value: Drive object: SERVO Reaction: NONE Acknowledge: NONE Cause: The angular commutation offset (p0431) was re-defined and has still not been saved. In order to permanently accept the new value, it must be saved in a non-volatile fashion (p0971, p0977). See also: p0431 (Angular commutation offset), p1990 (Encoder adjustment, determine angular commutation offset) Remedy: None necessary. This alarm automatical ly disappears after the data has been saved. See also: p0971 (Save drive object parameters), p0977 (Save all parameters) SINAMICS-Alarms
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 207965 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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