Siemens SINAMICS G120 Operating Instructions Manual page 300

Advanced commissioning
6.24 Motor control
Table 6-47 Linear and parabolic characteristics
Requirement Application examples
The required tor‐ Eccentric-worm pump,
que is independ‐ compressor
ent of the speed
The required tor‐ Centrifugal pumps, radi‐
que increases with al fans, axial fans, com‐
the speed pressors
Table 6-48 Characteristics for special applications
Requirement Application examples
Applications with a Centrifugal pumps, radi‐
low dynamic re‐ al fans, axial fans
sponse and con‐
stant speed
Additional information on V/f characteristics can be found in the parameter list and in the
function diagrams 6300 ff of the List Manual.
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.
300
Remark
-
The inverter equalizes the voltage drops
across the stator resistance. Recommen‐
ded for motors less than 7.5 kW.
Precondition: You have set the motor data
according to the rating plate and have per‐
formed the motor identification after the ba‐
sic commissioning.
Lower losses in the motor and inverter than
for a linear characteristic.
Remark
The ECO mode results in additional energy
saving when compared to the parabolic
characteristic.
If the speed setpoint is reached and re‐
mains unchanged for 5 seconds, the inver‐
ter again reduces its output voltage.
Operating Instructions, 09/2017, FW V4.7 SP9, A5E34257946B AE
Characteristic Parameter
Linear p1300 = 0
Linear with Flux p1300 = 1
Current Control
(FCC)
Parabolic p1300 = 2
Characteristic Parameter
ECO mode p1300 = 4
(linear char‐
acteristic
ECO)
or
p1300 = 7
(parabolic
characteris‐
tic ECO)
Converter with the CU230P-2 Control Units