11
12
13
14
15
16
17
18
19
20
253
11. (H) Protective Function Parameters
11.8 Limiting the output frequency (maximum/minimum frequency)
11.8
Limiting the output frequency (maximum/minimum
frequency)
Motor speed can be limited. Clamp the upper and lower limits of the output frequency.
Setting the maximum frequency (Pr.1, Pr.18)
• Set
Pr.1 Maximum frequency
to the upper limit of the output frequency. If the value of the frequency command given is
higher than the setting, the output frequency is clamped at the maximum frequency.
• To operate at a frequency higher than the 120 Hz, adjust the upper output frequency limit with
Pr.18 High speed
maximum frequency
. (When setting a frequency in
Pr.18
, the
Pr.1
setting automatically changes to the frequency set in
Pr.18
. Also, when a frequency is set in
Pr.1
, the
Pr.18
setting automatically changes to the frequency set in
Pr.1
.)
Setting the minimum frequency (Pr.2)
• Set
Pr.2 Minimum frequency
to the lower limit of the output frequency.
• If the set frequency is
Pr.2
or less, the output frequency is clamped at
Pr.2
(does not fall below
Pr.2
).
NOTE
• To operate with a frequency higher than 60 Hz using frequency-setting analog signals, change the
Pr.125 (Pr.126) (frequency
setting gain)
setting. Simply changing the
Pr.1 and Pr.18
settings does not enable the operation at a frequency higher than
60 Hz.
• Under Real sensorless vector control and PM sensorless vector control, the upper and lower limits are for the commanded
frequency. The final output frequency that is decided by each control may exceed the lower or upper limits.
• When
Pr.15 Jog frequency
is equal to or less than
Pr.2
, the
Pr.15
setting takes precedence.
• If a jump frequency that exceeds the setting of
Pr.1 (Pr.18)
is set, the maximum frequency setting is the set frequency. If the
jump frequency is less than the setting of
Pr.2
, the jump frequency is the set frequency. (The set frequency can be equal to or
less than the frequency lower limit.) When stall prevention is activated to decrease the output frequency, the output frequency
may drop to
Pr.2
or below.
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
Pr.
Name
Initial value
Setting range
Description
1
H400
Maximum frequency
120 Hz
0 to 120 Hz
Set the upper limit of the output frequency.
2
H401
Minimum frequency
0 Hz
0 to 120 Hz
Set the lower limit of the output frequency.
18
H402
High speed maximum
frequency
120 Hz
0 to 590 Hz
Set when operating at 120 Hz or higher.
CAUTION
• Note that when
Pr.2
is set to any value equal to or higher than
Pr.13 Starting frequency
, simply turning ON the start
signal runs the motor at the frequency set in
Pr.2
even if the command frequency is not given.
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)
Содержание FR-E800
Страница 17: ...16 1 Introduction 1 3 Related manuals MEMO ...
Страница 51: ...50 2 Basic Operation 2 8 I O terminal function assignment MEMO ...
Страница 89: ...88 3 Parameters 3 4 Parameter list by function group number MEMO ...
Страница 135: ...134 5 Speed Control 5 9 Troubleshooting in the speed control MEMO ...
Страница 153: ...152 6 Torque Control 6 7 Troubleshooting in torque control MEMO ...
Страница 195: ...194 8 E Environment Setting Parameters 8 18 Current average value monitor signal MEMO ...
Страница 237: ...236 10 D Operation Command and Frequency Command 10 6 Operation by multi speed setting MEMO ...
Страница 339: ...338 13 T Multi Function Input Terminal Parameters 13 9 Start signal operation selection MEMO ...
Страница 455: ...454 16 G Control Parameters 16 13 Speed smoothing control MEMO ...
Страница 481: ...480 18 Appendix 18 4 Parameters functions and instruction codes under different control methods MEMO ...
