37

Drive Runaway A1

Indramat · ServoDyn D Servo Drive

What does 37 mean?

This "Drive Runaway Axis 1" error indicates a conflict between the direction of the Axis 1 encoder feedback and the commanded polarity of Axis 1. This means the drive is trying to move in one direction, but the encoder reports movement in the opposite, or there's a misconfiguration in feedback/command polarity.

Common Causes

  • Direction Axis 1 parameter (P06) is incompatible with the wiring polarity of the Axis 1 encoder or the E1/E2 command inputs.
  • Encoder Data A1 parameter (P01) does not accurately reflect the encoder used on Axis 1, leading to incorrect interpretation of feedback.
  • RPM/Volts in Drive Sensit. A1 parameter (P03) does not match the Axis 1 amplifier's command input (E1/E2) characteristics.
  • Physical movement of Axis 1 (e.g., by external forces) without a corresponding command voltage, causing a discrepancy.
  • Incorrect wiring polarity of the Axis 1 encoder or the E1/E2 command inputs to the amplifier.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify that Parameter P06 (Direction Axis 1) is compatible with the wiring polarity of the Axis 1 encoder and the E1/E2 command inputs to the drive amplifier.

  2. 2

    Confirm that Parameter P01 (Encoder Data A1) accurately matches the specifications of the absolute or incremental encoder installed on Axis 1.

  3. 3

    Ensure Parameter P03 (Drive Sensit. A1) RPM/Volt setting corresponds to the actual RPM/Volt scaling of the Axis 1 amplifier's command input (E1/E2).

  4. 4

    Inspect Axis 1 for any mechanical binding or external forces that could cause movement independent of electrical commands.

  5. 5

    Check all wiring connections and polarities for the Axis 1 encoder and the E1/E2 command inputs to ensure they are correct and secure.

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Verified technical data. Last updated: March 2026

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Source: Indramat ServoDyn D Servo Drive
Indramat 37 (Drive Runaway A1) — Technical Reference | ErrorLib