). In Siemens Sinamics and Micromaster drive systems, fault and alarm codes typically follow a specific alphanumeric format, such as (Fault) or (Alarm) followed by several digits. Based on common Siemens documentation and user forums like Siemens SiePortal , here are the closest matches for your query: 1. Alarm A07991: Motor Data Identification Active The most likely match for your code is . This is a warning/alarm indicating that Motor Data Identification (Motor ID) is currently active. What it means:
The best way to clear this alarm depends on whether you intend to perform the motor identification or bypass it. 1. Complete the Identification Routine (Recommended) siemens fault 0a7991 best
Ensure the motor is at a standstill and the configuration is complete. Alarm A07991: Motor Data Identification Active The most
Does the fault happen or during a specific machine movement ? Are you using PROFINET or PROFIBUS ? siemens fault 0a7991 best
According to technical support documentation on the Siemens SiePortal , the common steps to clear this alarm include:
In Siemens SINAMICS drive systems, the alarm (often referred to as fault 0a7991) indicates that Motor Data Identification is activated . This is not a critical hardware failure but rather a status message indicating the drive is prepared to perform a measurement of the motor’s electrical characteristics. Understanding Alarm A07991
: After the alarm disappears, ensure you perform a Copy RAM to ROM (e.g., set p0971 = 1 ) to permanently save the new motor data, otherwise, the alarm may return after a power cycle. Common Troubleshooting Steps