Give the drive a "Start" or "ON" command via your control source (PLC, BOP, or IOP) .
To clear the A07991 alarm, use one of the following methods: Give the drive a "Run" or "Start" command. siemens fault 0a7991
In the world of industrial automation, Siemens is a dominant force, particularly with its SIMATIC S7 series of Programmable Logic Controllers (PLCs). These systems are the backbone of countless manufacturing processes, power plants, and critical infrastructure systems. However, like any complex electronic system, they are susceptible to errors. One error code that frequently surfaces in technical forums and service logs is . Give the drive a "Start" or "ON" command
Siemens Alarm A07991 (or A7991) on SINAMICS G120/S120 drives indicates that Motor Data Identification (ID) is active, requiring a motor ID run or manual adjustment to clear. The condition is resolved by running a motor identification, setting parameter P1900 to 0, or bypassing calculations via P340 during commissioning. For detailed solutions and forum discussions, visit Siemens SiePortal Dealing with Motor ID ( code 7991 ) - SiePortal - Siemens These systems are the backbone of countless manufacturing