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Description:
Sets the lowest possible motor speed.
This value is not undershot in operation.
Dependency:
See also: p1106
WARNING
The minimum speed is preassigned to 20% of the rated motor speed.
After all of the enable signal have been switched on, with the appropriate direction specified, the motor accelerates to
this minimum speed.
NOTICE
The effective minimum speed is formed from p1080 and p1106.
Note
The parameter value applies for both motor directions.
In exceptional cases, the motor can operate below this value (e.g. when reversing).
p1081
Maximum speed scaling / n_max scal
Access level: 2
Can be changed: T, U
Unit group: -
Min:
100.00 [%]
Description:
Sets the scaling for the maximum speed (p1082).
For a higher-level speed control, this scaling allows the maximum speed to be briefly exceeded.
Dependency:
See also: p1082
NOTICE
Continuous operation above a scaling of 100 % is not permitted.
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.
SINAMICS G120X converter
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
Calculated: -
Scaling: PERCENT
Unit selection: -
Max:
105.00 [%]
Calculated: CALC_MOD_ALL Data type: FloatingPoint32
Scaling: -
Unit selection: p0505
Max:
210000.000 [rpm]
Parameters
7.2 Parameter list
Data type: FloatingPoint32
Dynamic index: -
Function diagram: 3050, 3095
Factory setting:
100.00 [%]
Dynamic index: DDS, p0180
Function diagram: 3020, 3050,
3070
Factory setting:
1500.000 [rpm]
625
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