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Parameters
7.3 Parameters
p1082[0...n]
Maximum speed / n_max
Access level: 1
Can be changed: C2(1), T
Unit group: 3_1
Min:
0.000 [rpm]
Description:
Sets the highest possible speed.
Example:
Induction motor p0310 = 50 / 60 Hz without output filter and Blocksize power unit
p1082 <= 60 x 240 Hz / r0313 (vector control)
p1082 <= 60 x 550 Hz / r0313 (U/f control)
Dependency:
For vector control, the maximum speed is restricted to 60.0 / (8.333 x 500 µs x r0313). This can be identified by a
reduction in r1084. p1082 is not changed in this process due to the fact that the operating mode p1300 can be changed
over.
If a sine-wave filter (p0230 = 3) is parameterized as output filter, then the maximum speed is limited corresponding to
the maximum permissible filter output frequency (refer to the filter data sheet). When using sine-wave filters (p0230
= 3, 4), the maximum speed r1084 is limited to 70% of the resonant frequency of the filter capacitance and the motor
leakage inductance.
For reactors and dU/dt filters, it is limited to 120 Hz / r0313.
See also: p0230, r0313, p0322
NOTICE
After the value has been modified, no further parameter modifications can be made and the status is shown in r3996.
Modifications can be made again when r3996 = 0.
Note
The parameter applies for both motor directions.
The parameter has a limiting effect and is the reference quantity for all ramp-up and ramp-down times (e.g. down
ramps, ramp-function generator, motor potentiometer).
The parameter is part of the quick commissioning (p0010 = 1); this means that it is appropriately pre-assigned when
changing p0310, p0311, p0322.
The following limits are always effective for p1082:
p1082 <= 60 x minimum (15 x p0310, 550 Hz) / r0313
p1082 <= 60 x maximum power unit pulse frequency / (k x r0313), with k = 12 (vector control), k = 6.5 (U/f control)
During automatic calculation (p0340 = 1, p3900 > 0), the parameter value is assigned the maximum motor speed
(p0322). For p0322 = 0 the rated motor speed (p0311) is used as default (pre-assignment) value. For induction motors,
the synchronous no-load speed is used as the default value (p0310 x 60 / r0313).
For synchronous motors, the following additionally applies:
During automatic calculation (p0340, p3900), p1082 is limited to speeds where the EMF does not exceed the DC link
voltage.
p1082 is also available in the quick commissioning (p0010 = 1); this means that when exiting via p3900 > 0, the value
is not changed.
p1082[0...n]
Maximum speed / n_max
CUG120XA_USS
Access level: 1
(PM330)
Can be changed: C2(1), T
Unit group: 3_1
Min:
0.000 [rpm]
Description:
Sets the highest possible speed setpoint.
Dependency:
The maximum speed is limited to: p1082 <= 60 x 150 Hz / r0313
See also: p0230, p0310, r0313, p0322
476
Calculated: CALC_MOD_ALL Data type: FloatingPoint32
Scaling: -
Unit selection: p0505
Max:
210000.000 [rpm]
Calculated: CALC_MOD_ALL Data type: FloatingPoint32
Scaling: -
Unit selection: p0505
Max:
210000.000 [rpm]
Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB
Dynamic index: DDS, p0180
Function diagram: 3020, 3050,
3070
Factory setting:
1500.000 [rpm]
Dynamic index: DDS, p0180
Function diagram: 3020, 3050,
3070
Factory setting:
1500.000 [rpm]
SINAMICS G120XA converter
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