Nord Drivesystems SK 200E Series, Manual

Page: 145 / 265

6 Parameterisation
BU 0200 GB Subject to technical alterations 145
Parameter
{Factory setting}
Setting 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 } DIP7 = off
{ 60.0 } DIP7 = on
Section 5.1.1
The frequency supplied by the FI after being enabled and once the maximum setpoint is present,
e.g. analog setpoint corresponding to P403, a correspondingly fixed frequency or maximum via
the SimpleBox / ParameterBox.
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 deceleration 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
P102 P102 TIME ATION ACCELER tot
t t t
⋅ + =
[ ]
100%
% P106
P103 P103 TIME ON DECELERATI tot
t t t
⋅ + =
P102 P103
Output
frequency
Desired
frequency
Time
each
10 – 100% of P102
each
10 – 100% of P103