Specifications
38
Limit the Speed
Frequency reference upper limit d2-01
Frequency reference lower limit d2-02
Master speed reference lower limit d2-03
（1）Limiting maximum frequency
Use d2-01 when the motor is to be rotated at certain
min
-1
or less.
Set the frequency reference upper limit value (d2-01) in
the units of 0.1 ％.
(E1-04 maximum output frequency is 100%.)
＊ Factory setting: d2-01 = 100 ％
（2）Limiting minimum frequency
Use d2-02 or d2-03 when the motor is to be rotated at
certain
min
-1
or more.
There are two methods to limit the minimum
frequency as follows:
・
Adjust the lower limit levels of all frequencies (d2-02)
・Adjust the lower limit level of the master speed
frequency (d2-03)
（The lower limit levels of the jog frequency, multi-
step speed frequencies or auxiliary frequency are
not adjusted.）
When running at frequency reference 0, operation
continues at the lower limit value of the frequency
reference. However, operation is not performed if the
frequency lower limit value is set to less than the
minimum output frequency (E1-09).
＊ Factory setting: d2-02 = 0.0 ％, d2-03 = 0.0 ％
Internal
Frequency
Reference
Frequency Reference
Lower Limit（d2-02）
Frequency Reference
Upper Limit（d2-01）
Preset Reference
Operation to Avoid Resonance
Jump frequency 1, 2, 3 d3-01 to 03
Jump frequency width d3-04
The frequency that causes resonance can be jumped, to
avoid resonance characteristics of the machine system.
This function can also be applied to dead band control.
Set 0.0 Hz to disable this function.
Set jump frequencies 1 to 3 as follows.
d3-01 ≧ d3-02 ≧ d3-03
Frequency Reference
At Frequency Reference
Lower Limit
(Excluding digital references
for settings.)
At Frequency Reference
Upper Limit
Frequency Reference
(User Setting)
d3-03
d3-04
d3-04
d3-04
d3-02
d3-01
Note: Frequency varies smoothly without jumping during
acceleration or deceleration.
Frequency Reference by Pulse Train Input
Reference selection b1-01
Pulse train input function selection H6-01
Pulse train input scaling H6-02
By setting reference selection b1-01 to 4, frequency
reference can be set by pulse train input from the control
circuit terminal RP.
（1）Input pulse specifications
・Low level voltage 0.0 to 0.8 V
・High level voltage 3.5 to 13.2 V
・H duty 30 to 70 ％
・Pulse frequency 0 to 32 kHz
（2）How to give frequency reference
The value obtained by multiplying the maximum output frequency
by the ratio of the set maximum value of input pulse frequency and
the actual input pulse frequency makes reference frequency.
Constant No.
b1-01 Reference selection
Pulse train input function selection
Pulse train input scaling 1440 Hz
41
00
Pulse frequency
to be 100 ％ reference
H6-01
H6-02
Name Setting Value
Initial Value
Frequency
reference
Maximum output
frequency (E1-04)
＝
×
Input pulse frequency
Pulse train maximum frequency (H6-02)