Code 207509: <location>Drive: Component number missing
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical <location>Drive: Component number missing 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: %1 Drive object: SERVO, TM41, VECTOR Reaction: OFF2 Acknowledge: IMMEDIATELY Cause: A Drive Data Set (DDS) is assigned to a Motor Data Set (MDS) or Encoder Data Set (EDS) that does not have a component number. Alarm value (r2124, interpret decimal): nnmmmxxyyy nn: Number of the MDS/EDS. mmm: Parameter number of the missing component number. xx: Number of the DDS that is assigned to the MDS/EDS. yyy: Parameter number that references the MDS/EDS. Example: p0186[7] = 5: DDS 7 is assigned MDS 5. p0131[5] = 0: There is no component number set in MDS 5. Alarm value = 0513107186 Remedy: In the drive data sets, no longer assign MDS/EDS using p0186, p0187, p0188, p0189 or set a valid component number. See also: p0131, p0141, p0142, p0186, p0187, p0188, p0189 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 207509 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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