Siemens CU240B-2 - Page 241

Advanced commissioning
6.5 Motor control
Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
241
Characteristics after selecting the application class Standard Drive Control
Selecting application class Standard Drive Control reduces the number of characteristics and
the setting options:
● A linear and a parabolic characteristic are available.
● Selecting a technological application defines the characteristic.
● The following cannot be set - ECO mode, FCC, the programmable characteristic and a
specific voltage setpoint.
①
The closed-loop starting current control optimizes the speed control at low speeds
②
The inverter compensates the voltage drop across the motor stator resistance
Image 6-33 Characteristics after selecting Standard Drive Control
Table 6- 35 Linear and parabolic characteristics
Requirement
Application examples
Remark
Characteristic
Parameter
The required
torque is inde-
pendent of the
speed
Conveyor belts, roller convey-
ors, chain conveyors, eccen-
tric worm pumps,
compressors, extruders, cen-
trifuges, agitators, mixers
- Linear p0501 = 0
The required
torque increases
with the speed
Centrifugal pumps, radial fans,
axial fans
Lower losses in the motor and in-
verter than for a linear characteristic.
Parabolic p0501 = 1
Additional information on the characteristics can be found in the parameter list and in the
function diagrams 6851 ff of the List Manual.