Omron SYSDRIVE 3G3EV User Manual page 65

Preparing for Operation
n27
Intermediate Output Frequency
Setting range
Unit of setting 0.1 to 99.9 (Hz) : 0.1 (Hz)
n28
Intermediate Output Frequency Voltage
Setting range
Unit of setting 1 (V)
n29
Minimum Output Frequency
Setting range
Unit of setting 0.1 (Hz)
n30
Minimum Output Frequency Voltage
Setting range
Unit of setting 1 (V)
Note The values in parentheses are for the 400-VAC class.
•These constants are effective for the control of any machine the load characteristic of
which changes with the rotation of the motor incorporated by the machine, such as a
fan and pump. Set the V/f pattern so that it will conform to the torque and frequency
characteristics of the motor.
•These constants must satisfy the following condition, otherwise an error will result:
n29 ≤ n27 < n26 ≤ n24
•If the constant set in n29 and that set in n27 are the same, the constant set in n28 will be
ignored.
Example of n27, n28, n29, and n30 Settings
Output voltage
Maximum voltage
0.1 to 399 (Hz) Factory setting 1.5 (Hz)
100 to 399 (Hz) : 1 (Hz)
1 to 255 (510)
(V)
0.1 to 10.0 (Hz) Factory setting 1.5 (Hz)
1 to 50 (100)
(V)
(V)
Factory setting 12 (24) (V)
Factory setting 12 (24) (V)
n29 x n27 t n26 x n24
Output frequency
(Hz)
Chapter 4
4-23