NORDAC SK 5xxE Manual
72
Subject to technical alterations
BU 0500 GB
Parameter
Set value / Description / Note
Device
Supervisor
Parameter
set
P104 Minimum
frequency
P
0.0 ... 400.0 Hz
[ 0.0 ]
The minimum frequency is the frequency supplied by the FI as soon as it is enabled and no
additional setpoint is set.
In combination with other setpoints (e.g. analog setpoint of fixed frequencies) these are added to
the set minimum frequency.
This frequency is undershot when
a. the drive is accelerated from standstill.
b. the FI is blocked. The frequency then reduces to the absolute minimum (P505) before
it is blocked.
c. the FI is reversing. The reverse in the rotation field takes place at the absolute
minimum frequency (P505).
This frequency can be continuously undershot if, during acceleration or braking, the function
"Maintain frequency" (Function Digital input = 9) is executed.
P105 Maximum
frequency
P
0.1 ... 400.0 Hz
[ 50.0 ]
The frequency supplied by the FI after being enabled and once the maximum setpoint is present,
e.g. analog setpoint as per P403, a correspondingly fixed frequency or maximum via the
ControlBox.
This frequency can only be overshot by the slip compensation (P212), the function "Maintain
frequency" (function digital input = 9) or a change to another parameter set with lower maximum
frequency.
P106 Ramp
smoothing
S P
0 ... 100 %
[ 0 ]
This parameter enables a smoothing of the acceleration and braking ramps. This is necessary for
applications where gentle, but dynamic speed change is important.
Ramp smoothing 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.
The following then applies for the entire acceleration or deceleration time, including rounding:
[ ]
100%
%
P106
t
t
t
P102
P102
TIME
ON
ACCELERATI
tot
⋅
+
=
[ ]
100%
%
P106
t
t
t
P103
P103
TIME
ON
DECELERATI
tot
⋅
+
=
P102
P103
Output
frequency
Setpoint
frequency
Time
Currently
10 – 100% from P102
Currently
10 – 100% from P103
