Siemens SINAMICS V20 Operating Instructions Manual page 205

Parameter Function
P0341[0...2] Motor inertia [kg*m^2]
Sets no-load inertia of motor.
Together with P0342 (inertia ratio total / motor) and P1496 (scaling factor acceleration), this value produc-
es 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
Specifies ratio between total inertia (load + motor) and motor inertia.
Dependency: See P0341
P0344[0...2] Motor weight [kg]
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 inverter type and its rating
data.
r0345[0...2] Motor start-up time [s]
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]
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 inverter type and its rating data.
P0347[0...2] Demagnetization time [s] 0.000 -
Changes time allowed after OFF2 / fault condition, before pulses can be re-enabled.
Dependency: See P0341
Notice: Not active following a normally completed ramp-down, e.g. after OFF1, OFF3 or JOG. Overcurrent trips
will occur if the time is decreased excessively.
Note: The demagnetization time is approximately 2.5 x rotor time constant in seconds. Default value is depend-
ing on inverter type and its rating data.
SINAMICS V20 Inverter
Operating Instructions, 11/2016, A5E34559884-006
Range Factory
default
0.0001 - 0.0018
1000.0
1.000 - 1.000
400.00
1.0 - 6500.0 9.4
- -
0.000 - 1.000
20.000
1.000
20.000
Can be Scaling
changed
U, T -
U, T -
U, T -
- -
U, T -
U, T -
Parameter list
8.2 Parameter list
Data Data Acc.
set type Level
DDS Float 3
DDS Float 3
DDS Float 3
DDS Float 3
DDS Float 3
DDS Float 3
205