Write error during operation
Write Error During Operation
Mitsubishi Electric · FR-D700 Basic Inverter
What does Write error during operation mean?
A parameter writing attempt was made while the STF (STR) signal was ON (indicating operation) and Pr. 77 (Parameter write selection) was not set to '2' (which allows writing during operation). This protection mechanism prevents critical parameter changes during active inverter operation, which could lead to unsafe conditions or system instability.
Complete Troubleshooting Guide
- 1
Set Pr. 77 (Parameter write selection) to '2' to allow parameter writing while the inverter is operating.
- 2
Alternatively, stop the inverter operation (turn STF/STR OFF) before attempting to set or change parameters.