NORD Drivesystems BU0300 - Manual (Page 80)

NORDAC trio SK 300E Manual
80 Subject to technical alterations BU 0300 EN
Parameter Setting value / Description / Note
Supervisor
Parameter
set
Available with option
P106 Ramp smoothing
S P
Always available
0 ... 100 %
[ 0 ] This parameter enables a rounding of the acceleration and deceleration ramps. This is necessary for
applications where soft, but dynamic speed change is important.
A rounding is carried out for every setpoint change.
The value to be set is based on the set acceleration and deceleration time, however values <10%
have no effect.
P107 Brake reaction time
P
Always available
0 ... 2.50 s
[ 0.0 ] Electromagnetic brakes have a physically-dependent delayed reaction time when actuated. This can
lead to load drops during lifting applications, as the brake delays in taking over the load.
This reaction time can be taken into account under parameter P107 (Braking control).
Within the adjustable reaction time, the inverter supplies the set absolute minimum frequency (P505)
and so prevents movement against the brake and load drop when stopping.
P108 Disconnection mode
S P
Always available
0 ... 9
[ 1 ]
This parameter determines the manner in which the output frequency is reduced after "Blocking"
(controller enable Æ low):
0 = Voltage disable: The output signal is switched off immediately. The FI no longer supplies
an output frequency. In this case, the motor is braked only by mechanical friction.
Immediate switching on again of the FI can lead to error switch off.
1 = Ramp: The actual output frequency is reduced proportionally to the remaining braking time
from P103.
2 = Delayed ramping: As in Ramp Down, however the braking ramp is extended for
generational operation and the output frequency is increased for static operation. Under
certain conditions, this function can prevent overvoltage switch off or reduce brake
resistance power dissipation.
Note: This function must not be programmed if defined deceleration is required, e.g. with
lifting mechanisms.
3 = Immediate DC braking: The FI switches immediately to the preselected DC current
(P109). This direct current is supplied for > Time DC brake on < (P110).
4 = Constant braking distance: The deceleration ramp acts with a delay, if not moved with
the maximum output frequency (P105). This leads to a similar braking distance from
various frequencies.
Note: This function cannot be used as a positioning function. This function should not be
used with a ramp smoothing (P106).
5 = Combined braking: Dependent on the actual dc-link voltage, a high frequency voltage is
switched to the basic mode (linear characteristic curves only, P211 = 0 and P212 = 0). The
braking time is retained where possible (P103). Æ Additional heating in motor!
6 = Quadratic ramp: The deceleration ramp does not have a linear course, but is square.
7 = Quadratic ramp with delay: Combination of functions 2 and 6
8 = Quadratic combined braking: Combination of functions 5 and 6
9 = Constant acceleration power: Only valid for field weakening range! The drive is
accelerated and braked using constant electrical power. The course of the ramps depends
on the load.