Operating Instructions

2 Parameters
2.2 List of parameters
SINAMICS G120 CU230P-2 Control Units
182 List Manual (LH9), 04/2014, A5E33838102B AA
7: U/f control for a parabolic characteristic and ECO
20: Speed control (encoderless)
Dependency: Only operation with U/f characteristic is possible if the rated motor speed is not entered (p0311).
Refer to: p0300, p0311, p0500
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: The closed-loop torque control can only be changed over in operation (p1300 = 20, 21) by selecting the closed-loop
speed 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 motors, type p0300 = 6 and 6xx, operation with U/f control is only recommended for diagnostic purposes.
Description: Sets the open and closed-loop control mode of a drive.
Value: 0: U/f control with linear characteristic
1: U/f control with linear characteristic and FCC
2: U/f control with parabolic characteristic
4: U/f control with linear characteristic and ECO
7: U/f control for a parabolic characteristic and ECO
20: Speed control (encoderless)
Dependency: Only operation with U/f characteristic is possible if the rated motor speed is not entered (p0311).
Refer to: p0300, p0311, p0500
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: The closed-loop torque control can only be changed over in operation (p1300 = 20, 21) by selecting the closed-loop
speed 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 motors, type p0300 = 14, operation with U/f control is only recommended for diagnostic purposes.
Description: Defines the voltage boost as a [%] referred to the rated motor current (p0305).
The magnitude of the permanent voltage boost is reduced with increasing frequency so that at the rated motor
frequency, the rated motor voltage is present.
The magnitude of the boost in Volt at a frequency of zero is defined as follows:
Voltage boost [V] = 1.732 x p0305 (rated motor current [A]) x r0395 (stator/primary section resistance [ohm]) x p1310
(permanent voltage boost [%]) / 100 %
At low output frequencies, there is only a low output voltage in order to maintain the motor flux. However, the output
voltage can be too low in order to achieve the following:
- magnetize the induction motor.
- hold the load.
- compensate for losses in the system.
p1300[0...n] Open-loop/closed-loop control operating mode / Op/cl-lp ctrl_mode
PM330 Access level: 2 Calculated: - Data type: Integer16
Can be changed: C(1), T Scaling: - Dyn. index: DDS, p0180
Units group: - Unit selection: - Func. diagram: 6300, 6301, 8012
Min Max Factory setting
0 20 20
p1310[0...n] Starting current (voltage boost) permanent / I_start (Ua) perm
Access level: 2 Calculated: p0340 = 1 Data type: FloatingPoint32
Can be changed: U, T Scaling: - Dyn. index: DDS, p0180
Units group: - Unit selection: - Func. diagram: 6300, 6301
Min Max Factory setting
0.0 [%] 250.0 [%] 50.0 [%]