78
Limit the output frequency
4.4 Limit the output frequency
4.4.1
Maximum/minimum frequency (Pr. 1, Pr. 2, Pr. 18)
* The above parameters can be set when
Pr. 160 Extended function display selection
= "0". (
(2) Set minimum frequency
Use
Pr. 2 Minimum frequency
to set the minimum frequency.
If the set frequency is less than
Pr. 2
, the output frequency is clamped at
Pr. 2
(will not fall below
Pr. 2
).
Purpose
Parameter that should be Set
Refer to Page
Set upper limit and lower limit of
output frequency
Maximum/minimum
frequency
Pr. 1, Pr. 2, Pr. 18
Perform operation by avoiding
mechanical resonance points
Frequency jump
Pr. 31 to Pr. 36
Motor speed can be limited.
Clamp the upper and lower limits of the output frequency.
Parameter
Number
Name
Initial Value
Setting Range
Description
1
Maximum frequency
120Hz
0 to 120Hz
Upper limit of the output frequency.
2
Minimum frequency
0Hz
0 to 120Hz
Lower limit of the output frequency.
18
∗
High speed maximum
frequency
120Hz
120 to 400Hz
Set when performing the operation at 120Hz
or more.
(1) Set maximum frequency
Use
Pr. 1 Maximum frequency
to set the maximum frequency. If the
frequency of the frequency command entered is higher than the
setting, the output frequency is clamped at the maximum frequency.
When you want to perform operation above 120Hz, set the upper
limit of the output frequency to
Pr. 18 High speed maximum frequency
.
(When
Pr. 18
is set,
Pr. 1
automatically switches to the frequency of
Pr. 18
. Also, when
Pr. 1
is set,
Pr. 18
is automatically changed to the
frequency set in
Pr. 1
.
REMARKS
When performing operation above 50Hz using the frequency setting analog signal, change
Pr. 125 (Pr. 126) (frequency setting
gain).
REMARKS
When
Pr. 15 Jog frequency
is equal to or less than
Pr. 2
, the
Pr. 15
setting has precedence over the
Pr. 2
setting.
When stall prevention is activated to decrease the output frequency, the output frequency may drop to
Pr. 2
or below.
CAUTION
Note that when
Pr. 2
is set to any value equal to or more than
Pr. 13 Starting frequency
, simply turning on the start
signal will run the motor at the preset frequency according to the set acceleration time even if the command
frequency is not input.
Parameters referred to
Pr. 13 Starting frequency
Pr. 15
Jog frequency
Pr. 125 Terminal 2 frequency setting gain frequency, Pr. 126 Terminal 4 frequency setting gain frequency
Output frequency
(Hz)
Pr. 1
Pr. 18
Pr. 2
Frequency setting
Clamped at the
maximum frequency
Clamped at the
minimum frequency
5, 10V
(20mA)
0
(4mA)
Summary of Contents for FR-D700 Series
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