E2079

Absolute enc. monitoring, measuring encoder (encoder alarm)

Indramat · IndraDrive MPx02

What does E2079 mean?

An alarm condition has been detected by the IndraDrive MPx02 from the absolute measuring encoder (often a linear scale or external rotary encoder directly monitoring the load). This indicates a problem with the primary absolute position feedback for the machine's actual position, impacting precision, homing, and safety functions.

Common Causes

  • Loss of absolute position data from the measuring encoder (e.g., battery failure, memory corruption).
  • Internal fault within the absolute measuring encoder itself.
  • Communication error between the drive and the absolute measuring encoder.
  • Incorrect measuring encoder parameterization in the drive for the specific encoder type or resolution.
  • Mechanical damage or misalignment of the measuring encoder relative to the axis.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the absolute measuring encoder's status indicators (LEDs) for any error codes or abnormal behavior according to its manual.

  2. 2

    Verify the communication wiring and protocol settings between the IndraDrive MPx02 and the absolute measuring encoder, ensuring robust connection.

  3. 3

    If the measuring encoder uses a battery for absolute position retention (e.g., multi-turn rotary), check its voltage and replace it if necessary.

  4. 4

    Ensure that the absolute measuring encoder parameters in the drive are correctly configured for the specific encoder type, resolution, and mounting orientation.

  5. 5

    Attempt a re-initialization of the absolute position or a reference run if the absolute position data has been lost, and if the alarm persists, consider replacing the absolute measuring encoder.

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Verified technical data. Last updated: March 2026

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