Zeror.ai Error Codes Siemens A01021

Siemens A01021

Brand: SiemensModel: SINAMICS G120 CU250S2Error code: A01021

What the Fault Means

Alarm: Removable data medium as USB data storage medium from the PC used

Likely causes

  • The removable data medium is used as USB data storage medium from a PC As a consequence, the drive cannot access the removable data medium
  • When backing up, the configuration data cannot be saved on the removable data medium
  • Alarm value (r2124, interpret decimal): 1: The know-how protection as well as the copy protection for the removable data medium is active
  • Backup is inhibited

Solution and Safe First Checks

  1. De-activate the USB connection to the PC and back up the configuration data.

Safety: do not work inside the panel without isolating the power; if unsure, consult a qualified technician.

Related Siemens error codes

Source: the Zeror.ai industrial fault database and Siemens technical documentation. This page is for information; on critical systems follow the manufacturer's manual and authorised service.

Siemens A01021 · Zeror.ai