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Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 30-120 minutes

Alarm 300505

Siemens 300505 - Axis drive measuring circuit error of absolute track, code

This alarm indicates a hardware fault in the absolute encoder's measuring circuit, typically caused by encoder damage, wiring issues, or power supply problems. This is a hardware diagnostic alarm, not a programming error.

- Incremental encoder (ERN 1387) - The absolute motor track (C/D track) is monitored for wire-breaks. - Absolute encoder (EQN 1325) - Monitoring of the encoder hardware and the EnDat interface - Accurate diagnostics via error code MD 1023 $MD_ENC_ABS_DIAGNOSIS_MOTOR (diagnostics for measuring system absolute track) on motor measuring systems or MD 1033 $MD_ENC_ABS_DIAGNOSIS_DIRECT (diagnostics for direct measuring system absolute track) for direct measuring systems: - Overview of bit nos., significance, note: - Bit 0 Lighting failed - Bit 1 Signal amplitude too small - Bit 2 Code connection error - Bit 3 Overvoltage - Bit 4 Undervoltage - Bit 5 Overcurrent - Bit 6 Battery change necessary - Bit 7 CRC error (evaluate bit 13) see below, SW 4.2 and higher, synchronous linear motor - Bit 8 Encoder cannot be used, Assignment of absolute track to incremental track not allowed, SW 4.2 and higher, synchronous linear motor - Bit 9 C/D track for ERN1387 encoder incorrect (see below) or EQN encoder connected - Bit 10 Log cannot be aborted - Bit 11 SSI level detected in data cable - Bit 12 TIMEOUT while reading measured value - Bit 13 CRC error - Bit 14 Wrong IPU submodule for direct measuring signal, only with 611D expansion - Bit 15 Encoder defective - CRC error bit 7 and bit 13: - Bit 7: 0, bit 13: 1 CRC error from SIDA-ASIC - Bit 7: 1, bit 13: 0 Control check byte error - Bit 7: 1, bit 13: 1 Error on correction of absolute track by incremental track - Bits 12 and 15: Zero level monitoring SSI - Bits 14 and 15: Idle level monitoring SSI - Note on bit 9: - Incorrect parameterization (e.g. not on EQN MD 1011: $MD_ACTUAL_VALUE_CONFIG (actual value sensing configuration IM) or MD 1030: $MD_ACTUAL_VALUE_CONFIG_DIRECT (actual value sensing configuration IM) - or old hardware (not suitable for EQN) - or no encoder connected - or incorrect encoder cable (for ERN instead of EQN) Control reaction: Mode group not ready. The NC switches to follow-up mode. Channel not ready. NC Start disable in this channel. Interface signals are set. Alarm display. NC Stop on alarm. Channel not ready.