0a7991 - Siemens Fault

In Siemens TIA Portal (Totally Integrated Automation) and STEP 7 classic environments, diagnostic alarms are often displayed as hexadecimal codes. Fault is not a general PLC stop error (like a watchdog or memory error); rather, it falls into the category of a diagnostic interrupt .

Ensure the motor is safe to run (especially if "Rotating Measurement" is selected). Run command siemens fault 0a7991

Until this routine is completed or deactivated, the drive will not allow normal operation or parameter saving. It is most common during: : When a new motor is being set up. In Siemens TIA Portal (Totally Integrated Automation) and