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Siemens SINAMICS G120 Drive
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Feb 02, 2026 11:39 am
How can i resolve the fault Code 7991 and 8526 in siemens g120 drive? i am facing this issue in my drive.
please suggest how i correct this fault
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Feb 03, 2026 5:58 am
Fault codes 7991 and 8526 on a Siemens G120 drive usually occur together during commissioning.
- A07991 (Motor Data Identification Active) means the drive is waiting to perform a motor ID run, often appearing after power-cycles.
- A08526 (Profinet No Cyclic Connection) indicates the drive has no active communication with a PLC, often because the device name is not assigned