Write error during operation

Write Error During Operation

Mitsubishi · FR-D700 Inverter (Basic)

What does Write error during operation mean?

Parameter writing has been attempted while the inverter is actively operating (STF/STR signal is ON) and Pr. 77 Parameter write selection is not set to '2'. This error prevents parameter changes from being applied while the motor is running, which could cause instability, unsafe conditions, or unexpected behavior if allowed.

Complete Troubleshooting Guide

  1. 1

    Set '2' in Pr. 77 Parameter write selection to allow parameter writing even while the inverter is operating.

  2. 2

    Alternatively, stop the inverter operation (turn STF/STR OFF) before attempting to set or write parameters.

Source: Mitsubishi Manual