Siemens CU240B-2 Parameter Manual page 148

Parameters
List of Parameters
p1082[0...n] Maximum speed / n_max
Access level: 1
Can be changed: C(1), T
Units group: 3_1
Min
0.000 [rpm]
Description: Sets the highest possible speed.
Dependency: Refer to: 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).
Since the parameter is part of quick commissioning (p0010 = 1), it is defined appropriately when p0310, p0311,
p0322, p0324, p0530, p0531, and p0532 are changed.
The following limits are always effective for p1082:
p1082 <= min(p0324, p0532) if p0324 > 0 and p0532 > 0
p1082 <= p0322 if p0324 = 0 or p0532 = 0 and p0322 > 0
p1082 <= 60 x maximum(15 x r0310, 650 Hz) / r0313
p1082 <= 60 x maximum power unit pulse frequency / (k x r0313), with k = 12 (vector control), k = 6.5 (U/f control)
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). For reactors and dU/dt filters, it is
limited to 120 Hz / r0313.
During automatic calculation (p0340 = 1, p3900 > 0), the parameter value is assigned the maximum motor speed
(p0322). If 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.
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.
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.
p1083[0...n] CO: Speed limit in positive direction of rotation / n_limit pos
Access level: 3
Can be changed: U, T
Units group: 3_1
Min
0.000 [rpm]
Description: Sets the maximum speed for the positive direction.
Notice: A BICO interconnection to a parameter that belongs to a drive data set always acts on the effective data set.
r1084 CO: Speed limit positive effective / n_limit pos eff
Access level: 3
Can be changed: -
Units group: 3_1
Min
- [rpm]
Description: Displays the effective positive speed limit.
Dependency: Refer to: p1082, p1083, p1085
1-148
Calculated: p0340 = 1
Scaling: -
Unit selection: p0505
Max
210000.000 [rpm]
Calculated: -
Scaling: p2000
Unit selection: p0505
Max
210000.000 [rpm]
Calculated: -
Scaling: p2000
Unit selection: p0505
Max
- [rpm]
SINAMICS G120 / Control Units CU240B/E-2 Parameter Manual (LH11), 01/2011
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
1500.000 [rpm]
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
210000.000 [rpm]
Data type: FloatingPoint32
Data set: -
Factory setting
- [rpm]
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