Siemens Fault 0a7991 ((install)) -

: The drive is waiting for a run signal to perform a standstill or rotating measurement of the connected motor. Commissioning Mode

, for example, is a common overload fault often confused with others. Search the Manual siemens fault 0a7991

Saves parameters from RAM to ROM (perform after clearing alarm). Set to 0 : The drive is waiting for a run