Zeror.ai Error Codes Siemens A01945

Siemens A01945

Brand: SiemensModel: SINAMICS G120 CU250S2Error code: A01945

What the Fault Means

Alarm: PROFIBUS: Connection to the Publisher failed

Likely causes

  • For PROFIBUS peer-to-peer data transfer, the connection to at least one Publisher has failed
  • Alarm value (r2124, interpret binary): Bit 0 = 1: Publisher with address in r2077[0], connection failed
  • Bit 15 = 1: Publisher with address in r2077[15], connection failed.

Solution and Safe First Checks

  1. Check the PROFIBUS cables.

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 A01945 · Zeror.ai