Safety stop

Safety Stop Function Activated

Mitsubishi · FR-D700 Inverter (Basic)

What does Safety stop mean?

The inverter's safety stop function has been activated, resulting in the immediate shutdown of outputs. This typically indicates that a safety condition has been detected by the system, often an open circuit on the safety input terminals (S1 and SC, S2 and SC), or potentially an internal failure if these inputs are correctly shorted and the drive remains enabled. This is a critical protective action.

Complete Troubleshooting Guide

  1. 1

    If the safety stop function is not intended for use, ensure terminals S1 and SC, and S2 and SC are properly shorted with appropriate wiring to enable the drive.

  2. 2

    If using the safety stop function, check the wiring of terminals S1, S2, and SC for correctness and integrity, ensuring no breaks or loose connections.

  3. 3

    If the alarm persists despite correct wiring and inputs (S1/SC and S2/SC are shorted while drive is enabled), an internal inverter failure might be present; contact your sales representative.

  4. 4

    Refer to the Safety stop function instruction manual (BCN-A211508-000) for further detailed troubleshooting steps related to safety system integration.