Code A00511: Motor OverTemperature I2T
Issue Description & Safety Warning
The Siemens SINAMICS G120 CU240S Drive has triggered a critical Motor OverTemperature I2T 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: NONE Acknowledge: NONE Cause: - Motor overloaded. - Load cycles or load steps too high. Remedy: Independently of the kind of temperature determination check: - P0604 motor temperature warning threshold - P0625 motor ambient temperature If P0601 = 0 or 1, check the following: - Check if name plate data are correct? If not perform quick commissioning. Accurate equivalent circuit data can be found by performing motor identification (P1910=1). - Check if motor weight (P0344) is reasonable. Change if neccesary. - Via P0626, P0627, P0628 the standard overtemperatures can be changed, if the motor is not a Siemens stan- dard motor. If P0601 = 2, Check the following: - Check if temperature shown in r0035 is reasonable. - Check if the sensor is a KTY84 (other sensors are not supported)
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 A00511 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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