A01691

SLS signal inconsistency

Siemens · SINAMICS G120 Variable Speed Drive

What does A01691 mean?

An inconsistency has been detected in the safety input signals, specifically related to the Safe Limited Speed (SLS) function. The drive will initiate a controlled deceleration (SS1) and eventually enter a Safe Torque Off (STO) state, issuing a fault due to the potential compromise of safety integrity.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Acknowledge the resulting Safe Torque Off (STO) fault after resolving the signal inconsistency and verifying safety circuits.

Source: Siemens SINAMICS G120 Variable Speed Drive
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