In some cases, setting (V/f control mode) is also used to bypass complex motor modeling . Finalize the Setup
Before diving into the causes, it is important to recognize how this fault manifests in a live production environment: siemens fault 0a7991
For a deep dive into the technical details of the identification process itself, you should refer to the section of the SINAMICS G120 List Manual or the operating instructions for your specific drive model (e.g., G120, S120, or G130). In some cases, setting (V/f control mode) is
Are you currently in the of a new drive, or did this fault appear on a system that was already running ? Give the drive a "Run" command
Give the drive a "Run" command. The motor may whistle or make noise for several seconds while it measures the winding resistance and inductance at a standstill.