36 • vacon
ASFIFF12 High Speed
Tel. +358 (0)201 2121 • Fax +358 (0)201 212 205
Par. ID510
(ID512; ID514)
Par. ID509
(ID511; ID513)
Par. ID518 = 0,2
Par. ID518 = 1,2
NX12k81
fout [Hz]
Time [s]
Figure 5-17. Ramp speed scaling between prohibit frequencies
519
Flux braking current
(2.4.13)
Defines the flux braking current value. This value can be set between 0.4*I
H
and the
.
NOTE! The Max value for this parameter might differ for FR9 and bigger, and for NXLC.
520 Flux
brake
(2.4.12)
Instead of DC braking, flux braking is a useful way to raise the braking capacity in cases
where additional brake resistors are not needed.
When braking is needed, the frequency is reduced and the flux in the motor is increased,
which in turn increases the motor's capability to brake. Unlike DC braking, the motor
speed remains controlled during braking.
The flux braking can be set ON or OFF.
0
= Flux braking OFF
1
= Flux braking ON
Note:
Flux braking converts the energy into heat at the motor, and should be used
intermittently to avoid motor damage.
523
Frequency Scale
(2.1.17)
By changing the Frequency Scale will the internal variables for setting the decimals, and
max values for eg MaxFreq, Motor Nominal Freq/Speed, be set automatically.
Freq Scale
Sel.
Frequency Area
0
0-32,000 Hz
1
0-320,00 Hz
2
0-1900,0 Hz
3
0-3200,0 Hz
4
0-5200 Hz
5
0-7200 Hz