NORD Drivesystems BU0180 - Manual (Page 81)

6 Parameterisation
BU 0180 GB-0914 Pre-series version 81
Parameter
{Factory setting}
Setting value / Description / Note Device Supervisor
Parameter
set
P101
Copy
(Copy parameter set
S
0 ... 4
{ 0 }
After confirmation with the OK key, a copy of the parameter set selected in P100 >Parameter
set< is written to the parameter set dependent on the value selected here
0 = Do not copy
1 = Copy actual to P1: copies the active parameter set to parameter set 1
2 = Copy actual to P2: copies the active parameter set to parameter set 2
3 = Copy actual to P3: copies the active parameter set to parameter set 3
4 = Copy actual to P4: copies the active parameter set to parameter set 4
P102
Acceleration time
(Acceleration time)
P
0.05 ... 320.00 sec
{ 2.00 }
Start-up time (acceleration ramp) is the time corresponding to the linear frequency rise from 0Hz
to the set maximum frequency (P105). If an actual setpoint of <100% is being used, the
acceleration time is reduced linearly according to the setpoint which is set.
The acceleration time can be extended by certain circumstances, e.g. FI overload, setpoint lag,
smoothing, or if the current limit is reached.
Notes on ramp gradient:
Amongst other things, the ramp gradient is governed by the inertia of the rotor.
A ramp with a gradient which is too steep may result in the "inversion" of the motor.
In general, extremely steep ramps (e.g.: 0 - 50Hz in < 0.1 s) should be avoided, as may cause
damage to the frequency inverter.
P103
Deceleration time
(Deceleration time)
P
0.05 ... 320.00 sec
{ 2.00 }
Deceleration time (braking ramp) is the time corresponding to the linear frequency reduction from
the set maximum frequency (P105) to 0Hz. If an actual setpoint <100% is being used, the
deceleration time reduces accordingly.
The braking time can be extended by certain circumstances, e.g. by the selected >Switch-off
mode< (P108) or >Ramp smoothing< (P106).
Notes on ramp gradient: see parameter (P102)
P104
Minimum frequency
(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
(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 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.