Mitsubishi Electric FR-E520 Instruction Manual page 194

(6) Press the
SET
(7) Re-set Pr. 79 "operation mode selection" according to the operation mode to be
used.
You should be careful when setting any value other than "0" to the bias
frequency at 0V, since the motor will start at the preset frequency by
merely turning on the start signal if no speed command is given.
key to shift to the next parameter.
CAUTION
184
PARAMETERS