233111

Encoder 3: Absolute encoder EnDat, internal fault/error

Siemens · SINUMERIK 828D CNC Control

What does 233111 mean?

This fault indicates that the EnDat encoder's internal fault word has set specific fault bits, signaling various internal issues such as lighting system failure, low signal amplitude, incorrect position values, or problems with the encoder's 5V power supply (overvoltage, undervoltage, or overcurrent). Additionally, it can indicate a need for battery replacement in battery-backed encoders. An unresolved internal encoder fault will lead to unreliable position feedback, preventing accurate motor control, causing potential uncontrolled movements, and ultimately stopping machine operation.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    If Bit 6 is set, the battery must be changed (only for encoders with battery back-up).

Source: Siemens SINUMERIK 828D CNC Control
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