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
ttt
P102P102TIME ONACCELERATI tot
⋅+=
[]
100%
% P106
ttt
P103P103TIME ONDECELERATI tot
⋅+=
P102
P103
Outpu
frequency
Setpoin
frequency
ime
Currently
10 – 100% from P102
Currently
10 – 100% from P103
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