Mitsubishi Electric FR-D720S SC EC Instruction Manual page 314

Misoperation prevention and parameter setting restriction
Restart (PS reset) method when PU stop (PS display) is made during PU operation
PU stop ("PS" display) is made when the motor is stopped from the unit where control command
source is not selected (operation panel, parameter unit (FR-PU04/FR-PU07 or FR-PA02) in the
PU operation mode.
For example, when Pr. 551 "PU mode operation command source selection" = 9999 (initial val-
ue), the motor is stopped from the PU ("PS" display) if entered from the operation panel in PU
operation mode with the parameter unit mounted.
When the motor is stopped from the PU when the parameter unit (FR-PU04/FR-PU07) is
selected as control command source
After the motor has decelerated to a stop, press the STOP key of the parameter unit
(FR-PU04/FR-PU07).
Press the PU/EXT key to change to the external operation mode. The EXT indication is lit.
The message "PS" is canceled.
Press the PU key of the parameter unit (FR-PU04/FR-PU07) to select the PU operation
mode.
Press the FWD or the REV key of the parameter unit (FR-PU04/FR-PU07).
NOTE
When Pr. 551 = "9999", the priorities of the PU control source is parameter unit (FR-PU04/
FR-PU07) > operation panel.
m
CAUTION:
Do not reset the inverter while the start signal is being input. Otherwise, the motor will
start instantly after resetting, leading to potentially hazardous conditions.
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Parameter