Instruction manual

72
PARAMETERS
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.
 Can be used to set the upper and lower limits of motor speed.
<Setting>
• 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 Pr.
1.)
• Use Pr. 2 to set the lower limit of the output frequency.
Parameter
Number
Factory
Setting
Setting
Range
1 120Hz 0 to 120Hz
2 0Hz 0 to 120Hz
18 120Hz
120 to
400Hz
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.
CAUTION
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.
Pr. 13 "starting frequency"
Pr. 38 "frequency at 5V (10V)
input"
Pr. 39 "frequency at 20mA input"
Pr. 79 "operation mode selection"
Related parameters
Output frequency
Pr.1
Pr.18
Pr.2
Frequency setting
5,10V
(20mA)
0
(4mA)
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