62

Run disable

Vacon · NXS NXP

What does 62 mean?

The 'Run Enable' signal, which is required for the drive to operate, is currently low or inactive. This is a safety interlock designed to prevent the drive from starting. The drive will remain disabled until the run enable condition is met and the corresponding signal is active.

Common Causes

  • External safety relay (e.g., emergency stop circuit) contacts open, preventing the run enable signal (e.g., 24VDC) from reaching the drive input.
  • Drive digital input (e.g., terminal 18, 27) configured as 'Run Enable' is not receiving the required voltage (e.g., 24VDC).
  • Fieldbus command for run enable is not being sent or is incorrectly configured by the PLC or controller.
  • Internal drive safety function (e.g., Safe Torque Off - STO) activated or not correctly reset.
  • Drive parameter P5-10 (Digital input function) assigned to 'Run Enable' is misconfigured.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Measure voltage at the designated 'Run Enable' digital input terminal (e.g., terminal 18) with respect to common (terminal 20) (should be 24VDC when enabled).

  2. 2

    Trace the 'Run Enable' signal back through any external safety relays, verifying their contact closure and integrity.

  3. 3

    Check PLC/controller logic for the run enable bit and ensure it is being set correctly (e.g., through Modbus register 40001).

  4. 4

    Verify the status of any integrated safety functions (e.g., STO) via drive diagnostics and ensure they are reset.

  5. 5

    Confirm drive parameter P5-10 (Digital input function) is correctly assigned for 'Run Enable' (e.g., '8 = Start').

  6. 6

    Inspect the digital input terminal for loose wiring or corrosion.

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Verified technical data. Last updated: March 2026

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