Siemens SINAMICS V20 - Page 220

Parameter list
8.2 Parameter list
SINAMICS V20 Converter
218 Operating Instructions, 10/2019, A5E34559884-012
Parameter
Function
Range
Factory
default
Can be
changed
Scaling
Data
set
Data
type
Acc.
Level
0
No calculation
1
Complete parameterization
2
Calculation of equivalent circuit data
3 Calculation of V/f control data
4
Calculation of controller settings only
Note:
This parameter is required during commissioning to optimize converter performance. If there is a large
mismatch in Power ratings of converter to Motor it is possible that r0384 and r0386 may not be calculated
correctly. In these cases use P1900.
When transferring P0340, the converter uses its processor to carry out internal calculations. Communica-
tions to the converter may be interrupted.
The faults can be acknowledged as soon as the calculations have been completed in the converter. These
calculations can take approximately 10s to complete.
P0341[0...2]
Motor inertia [kg*m^2]
0.0001 -
1000.0
0.0018 U, T - DDS Float 3
Sets no-load inertia of motor.
Together with P0342 (inertia ratio total/motor) and P1496 (scaling factor acceleration), this value produces
the acceleration torque (r1518), which can be added to any additional torque produced from a BICO
source (P1511), and incorporated in the torque control function.
Dependency:
This parameter is influenced by automatic calculations defined by P0340.
Note:
The result of P0341 * P0342 is included in the speed controller calculation.
P0341 * P0342 = total motor inertia
P1496 = 100 % activates acceleration pre-control for the speed controller and calculates the torque from
P0341 and P0342.
P0342[0...2]
Total/motor inertia ratio
1.000 - 400.00
1.000
U, T
-
DDS
Float
3
Specifies ratio between total inertia (load + motor) and motor inertia.
Dependency:
See P0341
P0344[0...2]
Motor weight [kg]
1.0 - 6500.0
9.4
U, T
-
DDS
Float
3
Specifies motor weight [kg].
Dependency:
See P0341
Note:
This value is used in the motor thermal model. It is normally calculated automatically from P0340 (motor
parameters) but can also be entered manually. Default value is depending on converter type and its rating
data.
r0345[0...2]
Motor start-up time [s]
-
-
-
-
DDS
Float
3
Displays motor start-up time. This time corresponds to the standardized motor inertia. The start-up time is
the time taken to reach rated motor speed from standstill at acceleration with rated motor torque (r0333).
P0346[0...2]
Magnetization time [s]
0.000 - 20.000
1.000
U, T
-
DDS
Float
3
Sets magnetization time [s], i.e. waiting time between pulse enable and start of ramp-up. Motor magneti-
zation builds up during this time. Magnetization time is normally calculated automatically from the motor
data and corresponds to the rotor time constant.
Dependency:
See P0341
Notice:
An excessive reduction of this time can result in insufficient motor magnetization.
Note:
If boost settings are higher than 100 %, magnetization time may be reduced. Default value is depending
on converter type and its rating data.