Filter
Top Products
115
Limiting the rotation speed
4
PARAMETERS
4.7 Limiting the rotation speed
4.7.1 Maximum/minimum setting (Pr.1, Pr.2)
When a value exceeding 3000 r/min is set, the rotation speed will be limited at 3000 r/min.
Also, when an S-PM geared motor is used, the maximum setting value differs depending on the drive unit capacity. (0.2 to 2.2K: 12000 r/min, 3.7K: 8000 r/
min)
(2) Set minimum speed
Use Pr.2 Minimum setting to set the minimum rotation speed.
If the set speed is less than Pr.2, the rotation speed is clamped at Pr.2 (will not fall below Pr.2 ).
Purpose Parameter to set Refer to page
To set upper limit and lower limit of
rotation speed
Maximum/minimum setting Pr.1, Pr.2
115
To perform operation by avoiding
mechanical resonance points
Speed jump Pr.31 to Pr.36
116
You can limit the motor speed.
Clamp the upper and lower limits of the rotation speed.
Parameter
number
Name Initial value Setting range Description
1 Maximum setting
3000r/min 0 to 4800r/min Upper limit of the rotation speed.
2 Minimum setting
0r/min 0 to 4800r/min Lower limit of the rotation speed.
(1) Set maximum speed
Use Pr.1 Maximum setting to set the maximum rotation speed. If the
value of the speed command entered is higher than the setting, the
rotation speed is clamped at the maximum speed.
The speed command is also clamped at the operable speed range
of the selected motor.
If the motor's operable maximum speed < maximum setting, the
speed does not increase to the maximum speed.
REMARKS
Because the speed is limited by the speed command, the upper limit value or a higher value may be displayed on the monitor.
REMARKS
When Pr.15 Jog speed setting is equal to or less than Pr.2, the Pr.15 setting has precedence over the Pr.2 setting.
When torque limit is activated to decrease the rotation speed, the rotation speed may drop to Pr.2 or below.
Because the speed is limited by the speed command, the lower limit value or a lower value may be displayed on the monitor.
NOTE
Under position control, the lower limit setting is disabled.
CAUTION
Note that when Pr.2 is set to any value equal to or more than Pr.13 Starting speed, simply turning ON the start
signal will run the motor at the preset speed according to the set acceleration time even if the command speed
is not input.
Parameters referred to
Pr.13 Starting speed Refer to page 128
Pr.15 Jog speed setting Refer to page 119
Pr.125 Terminal 2 speed setting gain speed, Pr.126 Terminal 4 speed setting gain speed Refer to page 173
Rotation speed
(r/min)
Pr.1
Pr.2
Speed setting value
Clamped at the
maximum setting
Clamped at the
minimum setting
5, 10V
(20mA)
0
(4mA)