: Changing critical motor data (like rated voltage or current) may automatically trigger a request for a new identification run. Interrupted Identification
Help identify the specific you are using (e.g., G120C vs. S120).
The motor data identification has not been completed, and the drive has not received the command to stop the ID run process. Step-by-Step Solution: How to Fix A07991 siemens fault 0a7991
represents an active Motor Data Identification (Motor ID) routine status rather than a critical system breakdown . This standard status indicator frequently occurs during system commissioning, parameter resets, or sudden power-cycle events across variable frequency drives like the Siemens SINAMICS G120 , G130 , G150 , and V90 series. When triggered, the drive prevents normal operation because it requires an initial tuning sequence to calculate winding resistances, leakage inductances, and physical motor behaviors. Root Causes of Alarm A07991
Follow these steps to resolve the fault. Ensure all power is safely disconnected before checking physical connections. : Changing critical motor data (like rated voltage
Technically categorized as an alarm rather than a permanent hardware fault, this message serves as a system notification: the drive is waiting for an upcoming ON command to measure the electrical characteristics of the connected motor to optimize control performance. Technical Causes of Code A07991
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Issue – Fault A07991 cannot be cleared on SINAMICS G120C drive
Depending on whether you are running a live motor or testing equipment on a test bench, use one of the standard engineering paths below to clear the notification. The motor data identification has not been completed,
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