Code F00041: Motor Data Identification Failure
Issue Description & Safety Warning
The Siemens SINAMICS G120 CU240S Drive has triggered a critical Motor Data Identification Failure 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
Reaction: OFF 2 Acknowledge: Quit fault eg. via DI2 Cause: Motor data identification failed. - r0949 = 0: Load missing - r0949 = 1: Current limit level reached during identification. - r0949 = 2: Identified stator resistance less than 0.1% or greater than 100%. - r0949 = 3: Identified rotor resistance less than 0.1% or greater than 100%. - r0949 = 4: Identified stator reactance less than 50% and greater than 500% - r0949 = 5: Identified main reactance less than 50% and greater than 500% - r0949 = 6: Identified rotor time constant less than 10ms or greater than 5s - r0949 = 7: Identified total leakage reactance less than 5% and greater than 50% - r0949 = 20: Identified IGBT on-voltage less than 0.5 V or greater than 10 V - r0949 = 30: Current controller at voltage limit - r0949 = 40: Inconsistence of identified dataset, at least one identification failed - r0949 = 41: Writing of calculated magnetizing current P0320 failed - r0949 = 42: Writing of identified stator resistance failed - r0949 = 43: Writing of identified rotor resistance P0354 failed - r0949 = 44: Writing of identified rotor time constant P0622 failed - r0949 = 45: Writing of identified mutual reactance P0360 failed - r0949 = 46: Writing of identified stator leakage reactance P0356 failed - r0949 = 47: Writing of identified rotor leakage reactance P0358 failed - r0949 = 48: Writing of identified on voltage P1825 failed. - r0949 = 49: Writing of the identified dead time compensation P1828 failed Percentage values based on the impedance Zb = Vmot,nom / sqrt(3) / Imot,nom Remedy: Check the following: - r0949 = 0: is the motor connected to the inverter. - r0949 = 1-49: are the motor data in p0304 - p0311 correct. - Check what type of motor wiring is required (star, delta).
Source: SINAMICS G120 Control Units CU240S Faults and Alarms (Edition 05/2007)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Siemens SINAMICS G120 CU240S Drive Alarms
Siemens controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code F00041 on the SINAMICS G120 CU240S Drive 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: 108 Siemens SINAMICS G120 CU240S Drive codes.
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