Siemens CU240B-2 Parameter Manual page 186

Parameters
List of Parameters
p1297[0...n] Vdc_min controller speed threshold (U/f) / Vdc_min n_thresh
PM240 Access level: 3
Can be changed: U, T
Units group: 3_1
Min
0.00 [rpm]
Description: Sets the speed threshold for the Vdc-min controller (kinetic buffering).
If this value is exceeded a fault is output; the required response can be parameterized .
r1298 CO: Vdc controller output (U/f) / Vdc_ctrl output
PM230 Access level: 3
PM240
Can be changed: -
Units group: 3_1
Min
- [rpm]
Description: Displays the actual output of the Vdc controller (DC link voltage controller)
p1300[0...n] Open-loop/closed-loop control operating mode / Op/cl-lp ctrl_mode
Access level: 2
Can be changed: C(1), T
Units group: -
Min
0
Description: Sets the open and closed-loop control mode of a drive.
Value: 0:
1:
2:
3:
4:
5:
6:
7:
19:
20:
22:
Dependency: Only operation with U/f characteristic is possible if the rated motor speed is not entered (p0311).
Operation with a U/f characteristic is not supported for 1LE4 synchronous motors.
Refer to: p0300, p0311, p0500, p1501
Notice: Active slip compensation is required in the U/f control types with Eco mode (p1300 = 4, 7). The scaling of the slip
compensation (p1335) should be set so that the slip is completely compensated (generally 100%).
The Eco mode is only effective in steady-state operation and when the ramp-function generator is not bypassed. In
the case of analog setpoints, if required the tolerance for ramp-up and ramp-down should be actively increased for
the ramp-function generator using p1148 in order to reliably signal a steady-state condition.
Note: Only by selecting closed-loop speed control (p1300 = 20) is it possible to change over in operation to closed-loop
torque control (p1501). At the changeover, the setting of p1300 does not change. In this case, the actual state is
displayed in r1407, bit 2 and bit 3.
For the open-loop control modes p1300 = 5 and 6 (textile sector), slip compensation p1335, resonance damping
p1338, and the Imax frequency controller are switched off internally so that the output frequency can be set pre-
cisely. The Imax voltage controller remains active.
During operation (the pulses enabled) the open-loop/closed-loop control mode cannot be changed by changing
over drive data sets.
1-186
U/f control with linear characteristic
U/f control with linear characteristic and FCC
U/f control with parabolic characteristic
U/f control with parameterizable characteristic
U/f control with linear characteristic and ECO
U/f control for drives requiring a precise freq. (e.g. textiles)
U/f control for drives requiring a precise frequency and FCC
U/f control for a parabolic characteristic and ECO
U/f control with independent voltage setpoint
Speed control (encoderless)
Torque control (encoderless)
SINAMICS G120 / Control Units CU240B/E-2 Parameter Manual (LH11), 01/2011
Calculated: p0340 = 1
Scaling: -
Unit selection: p0505
Max
210000.00 [rpm]
Calculated: -
Scaling: p2000
Unit selection: p0505
Max
- [rpm]
Calculated: -
Scaling: -
Unit selection: -
Max
22
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
50.00 [rpm]
Data type: FloatingPoint32
Data set: -
Factory setting
- [rpm]
Data type: Integer16
Data set: DDS, p0180
Factory setting
0
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