4.2.2 Output frequency range (Pr. 1, Pr. 2, Pr. 18)
Pr. 1 "maximum frequency"
Pr. 2 "minimum frequency"
Pr. 18 "high-speed maximum frequency"
Used to clamp the upper and lower limits of the
output frequency. Used for high-speed operation at
or over 120Hz.
z Can be used to set the upper and lower limits of motor speed.
y Use Pr. 1 to set the upper limit of the output frequency. If the frequency of the
frequency command entered is higher than the setting, the output frequency is
clamped at the maximum frequency.
To perform operation over 120Hz, set the upper limit of the output frequency in Pr. 18.
(When the Pr. 18 value is set, Pr. 1 automatically changes to the frequency in Pr. 18.
Also, when the Pr. 1 value is set, Pr. 18 automatically changes to the frequency in
y Use Pr. 2 to set the lower limit of the output frequency.
Note: When the potentiometer (frequency setting potentiometer) connected across
terminals 2-5 is used for operation beyond 60Hz, change the value of Pr. 38
(or Pr. 39 for use of the potentiometer connected across terminals 4-5).
Operation over 60Hz cannot be performed by merely changing the settings of
Pr. 1 and Pr. 18.
When the Pr. 2 setting is higher than the Pr. 13 "starting frequency" value,
note that the motor will run at the set frequency by merely switching the
start signal on, without entering the command frequency.
0 to 120Hz
0 to 120Hz
Pr. 13 "starting frequency"
Pr. 38 "frequency at 5V (10V)
Pr. 39 "frequency at 20m A input"
Pr. 79 "operation m ode selection"