Mitsubishi Electric FR-F740 EC Instruction Manual page 205

Parameter
Set the minimum frequency
Use Pr. 2 "Minimum frequency" to set the lower limit of the output frequency.
NOTES
When Pr. 15 "Jog frequency" is equal to or less than Pr. 2, the Pr. 15 setting has precedence
over the Pr. 2 setting.
The output frequency is clamped by the Pr. 2 setting even the set frequency is lower than
the Pr. 2 setting (The frequency will not decrease to the Pr. 2 setting.)
CAUTION:
E
If the Pr. 2 setting is higher than the Pr. 13 "Starting frequency" value, note that the
motor will run at the set frequency according to the acceleration time setting by merely
switching the start signal on, without entry of the command frequency.
FR-F700 EC
Limit the output frequency
6 - 55