Zeror.ai Error Codes Siemens A01944

Siemens A01944

Brand: SiemensModel: SINAMICS G120 CU250S2Error code: A01944

What the Fault Means

Alarm: PB/PN sign-of-life synchronism not reached

Likely causes

  • The bus is in the data exchange state and clock synchronous operation has been selected using the parameterizing telegram
  • Synchronization with the master sign-of-life (STW2.12 ..
  • STW2.15) could not be completed because the sign-of-life is changing differently to how it was configured in the Tmapc time grid.

Solution and Safe First Checks

  1. ensure that the master correctly increments the sign-of-life in the master application clock cycle Tmapc.
  2. correct the interconnection of the master sign-of-life (p2045).

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 A01944 · Zeror.ai