104
Commander SE Advanced User Guide
Issue Number: 4
In analog reference 1 and analog reference 2 modes, a preset speed will be selected instead of analog reference 1 or
analog reference 2 if the preset speed selected is any other than preset speed 1 even if the preset reference, 1.42, is
not selected. This is because of the easy set-up modes that give the user the flexibility to select between analog
reference 1 and 3 preset speeds, or analog reference 2 and 3 presets speed with only 2 digital inputs.
The ramp rates are expressed as time for a change of 100Hz on the ramp output. Therefore with a programmed ramp time of
5 seconds the ramp output will reach 50Hz from 0 in 2.5 seconds.
The motor rated frequency is used to define the voltage to frequency characteristic applied to the drive (see
5.14
and
21.09
).
The motor rated current should be set to the machine nameplate value for rated current.
This value is used in the following:
Current limit, see parameter
4.07
Ixt system, see parameter
4.15
Slip compensation, see parameter
5.36
Dynamic v to f control, see parameter
5.13
The rated full load rpm is used with the motor rated frequency and No. of poles to calculate the rated slip of the induction
machine in Hz.
rated slip = motor rated frequency - (no. of pole pairs x motor full load rpm / 60)
=
21.06
- ((
21.11
/ 2) x
21.08
/ 60)
The rated slip is used to calculate the frequency adjustment required to compensate for slip from the following equation:
slip compensation = rated slip x active current / rated active current
If slip compensation is required this parameter should be set to the name-plate value, which should give the correct rpm for a
hot machine.
Sometimes it will be necessary to adjust this when the drive is commissioned because the nameplate value might be
inaccurate. Slip compensation will operate correctly for below base speed and field weakening operation. Slip compensation
will not cause a frequency in the opposite direction to the post ramp frequency reference.
21.04
Motor 2 Acceleration ramp rate
21.05
Motor 2 Deceleration ramp rate
Ú
0.0 ~ 3200.0
Ö
s/100Hz
RW
Uni
Parameter
Function
Default
21.04
Motor 2 Accel 1
5.0
21.05
Motor 2 Decel 1
10.0
21.06
Motor 2 rated frequency
Ú
1000.0
Ö
Europe> 50.0
USA> 60.0
Hz
RW
Uni
21.07
Motor 2 motor rated current
Ú
0 ~ Drive rated current
Ö
Drive rated
current
A
RW
Uni
21.08
Motor 2 motor rated full load rpm
Ú
0 ~ 9999
Ö
Europe> 1500
USA> 1800
rpm
RW
Uni
NOTE
Содержание COMMANDER SE
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Страница 142: ...142 Commander SE Advanced User Guide Issue Number 4 Figure 6 9 Input line reactor 4400 0241 All dimensions in mm...
Страница 144: ...144 Commander SE Advanced User Guide Issue Number 4 Figure 7 3 Commander SE Size 4 All dimensions in mm...