Motor Inertia; Total/Motor Inertia Ratio; Motor Weight; Motor Start-Up Time - Siemens MICROMASTER 440 Parameter Manual

Parameter Description
P0341[3] Motor inertia [kg*m^2]
CStat: CUT
P-Group: MOTOR
Sets no-load inertia of motor.
Together with P0342 (inertia ratio total/motor) and P1496 (scaling factor acceleration), this value produces
the acceleration torque (r1517), which can be added to any additional torque produced from a BICO source
(P1511), and incorporated in the torque control function.
Index:
P0341[0] : 1st. Drive data set (DDS)
P0341[1] : 2nd. Drive data set (DDS)
P0341[2] : 3rd. Drive data set (DDS)
Note:
The result of P0341 * P0342 is included in the speed controller calculation. P0341 * P0342 (inertia ratio
total/motor) = total motor inertia
P1496 (scaling factor acceleration) = 100 % activates acceleration pre-control for the speed controller and
calculates the torque from P0341 (motor inertia) and P0342 (inertia ratio total/motor).
P0342[3]

Total/motor inertia ratio

CStat: CUT
P-Group: MOTOR
Specifies ratio between total inertia (load + motor) and motor inertia.
Index:
P0342[0] : 1st. Drive data set (DDS)
P0342[1] : 2nd. Drive data set (DDS)
P0342[2] : 3rd. Drive data set (DDS)
P0344[3]

Motor weight

CStat: CUT
P-Group: MOTOR
Specifies motor weight [kg].
Index:
P0344[0] : 1st. Drive data set (DDS)
P0344[1] : 2nd. Drive data set (DDS)
P0344[2] : 3rd. Drive data set (DDS)
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[3]

Motor start-up time

P-Group: MOTOR
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).
Index:
r0345[0] : 1st. Drive data set (DDS)
r0345[1] : 2nd. Drive data set (DDS)
r0345[2] : 3rd. Drive data set (DDS)
P0346[3] Magnetization time
CStat: CUT
P-Group: MOTOR
Sets magnetization time [s], i.e. waiting time between pulse enable and start of ramp-up. Motor
magnetization builds up during this time.
Magnetization time is normally calculated automatically from the motor data and corresponds to the rotor
time constant (r0384).
Index:
P0346[0] : 1st. Drive data set (DDS)
P0346[1] : 2nd. Drive data set (DDS)
P0346[2] : 3rd. Drive data set (DDS)
Note:
- If boost settings are higher than 100 %, magnetization time may be reduced.
- Default value is depending on inverter type and its rating data.
- An excessive reduction of this time can result in insufficient motor magnetization.
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Datatype: Float Unit: -
Active: Immediately QuickComm.: No
Datatype: Float Unit: -
Active: Immediately QuickComm.: No
Datatype: Float Unit: kg
Active: Immediately QuickComm.: No
Datatype: Float Unit: s
Datatype: Float Unit: s
Active: Immediately QuickComm.: No
Issue 01/06
Min: 0.00010
Def: 0.00180
Max: 1000.00000
Min: 1.000
Def: 1.000
Max: 400.000
Min: 1.0
Def: 9.4
Max: 6500.0
Min: -
Def: -
Max: -
Min: 0.000
Def: 1.000
Max: 20.000
MICROMASTER 440 Parameter List
6SE6400-5BB00-0BP0
Level
3
Level
3
Level
3
Level
3
Level
3