Firmware Manual

9000X AF Drives
8-56 For more information visit: www.eaton.com
MN04004001E
August 2010
Description of Parameters
Figure 8-46: Ramp Speed Scaling between
Skip Frequencies
518 Acceleration/deceleration ramp
speed scaling ratio between
skip frequency limits
234567 (P1.5.3, P1.5.7)
Defines the acceleration/deceleration time when the output frequency is between the
selected skip frequency range limits (ID509 and ID510). The ramping speed (selected
acceleration/deceleration time 1 or 2) is multiplied with this factor. E.g. value 0.1
makes the acceleration time 10 times shorter than outside the skip frequency range
limits.
519 Flux braking current 234567 (P1.4.13)
Defines the flux braking current value. This value can be set between 0.4*I
H
and the
Current limit.
520 Flux brake 234567 (P1.4.12)
Instead of DC braking, flux braking is a useful form of braking for motors ≤ 15 kW.
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 in the motor, and should be used
intermittently to avoid motor damage.
f
out
(Hz)
Time (s)
ID518 = 1.2
ID518 = 0.2
ID509
(ID511; ID513)
ID510
(ID512; ID514)