Mitsubishi Electric FR-D720-0.2K-G Instruction Manual page 247

Setting the parameter unit and operation panel
(3) Disable the setting dial and key operation of the operation panel (Press [MODE] long (2s))
Operation using the setting dial and key of the operation panel can be invalid to prevent parameter change, and
unexpected start or speed setting.
Set "10 or 11" in Pr. 161, then press
When the setting dial and key operation are invalid, "
attempted while dial and key operation are invalid, "
display appears.)
To make the setting dial and key operation valid again, press
REMARKS
 Even if the setting dial and key operation are disabled, the monitor display and
NOTE
 Release the operation lock to release the PU stop by key operation.
244
for 2s to make the setting dial and key operation invalid.
" appears on the operation panel. If dial or key operation is
" appears. (When dial or key is not touched for 2s, monitor
for 2s.
are valid.