Omron VARISPEED L7 Manual page 212

Setting the V/f Pattern
If E1-03 is set to F, the V/f pattern can be set individually using the parameters E1-04 to E1-10 (see
Output voltage (V)
To set the V/f characteristics linear, set E1-07 and E1-09 to the same value. In this case, E1-08 will be ignored.
INFO
Setting Precautions
When a user-defined V/f pattern is used, consider the following points:
By changing the control method, the parameters E1-07 to E1-10 are changed to the factory settings for the
•
selected control method.
Be sure to set the four frequencies as follows:
•
E1-04 (FMAX) ≥ E1-06 (FA) > E1-07 (FB) ≥ E1-09 (FMIN)
Manual Setting of the Motor Parameters
Motor Rated Current Setting (E2-01, E4-01)
Set E2-01 to the rated current value as written on the motor nameplate.
Motor Rated Slip Setting (E2-02, E4-02)
Set E2-02 to the motor rated slip calculated from the number of rated rotations on the motor nameplate.
Motor rated slip
Motor No-Load Current Setting (E2-03, E4-03)
Set E2-03 to the motor no-load current at the rated voltage and rated frequency. Normally, the motor no-load
current is not written on the motor nameplate. The following formula can be taken as an indication:
(
I = sin acos
0
Number of Motor Poles Setting (E2-04, E4-04)
E2-04 is displayed only when Closed Loop Vector control method is selected. Set the number of motor poles
as written on the motor nameplate.
Fig 6.24 V/f pattern setting
Rated speed (Rpm)
------------------------------------------------------------------------------------------ -
= Motor rated frequency (Hz) –
ϕ )
cos
Frequency (Hz)
× No. motor poles
120
Fig 6.24).
6
61
6-