Siemens 440 User Manual

Page 58

Parameter Description

Issue 01/06

MICROMASTER 440 Parameter List

6SE6400-5BB00-0BP0

P0341[3]

Motor inertia [kg*m^2]

Min: 0.00010

CStat:

CUT

Datatype: Float Unit:

Def:

0.00180

P-Group: MOTOR

Active: Immediately

QuickComm.: No

Max: 1000.00000

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

Min: 1.000

CStat:

CUT

Datatype: Float Unit:

Def:

1.000

P-Group: MOTOR

Active: Immediately

QuickComm.: No

Max: 400.000

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

Min: 1.0

CStat:

CUT

Datatype: Float Unit:

Def:

9.4

P-Group: MOTOR

Active: Immediately

QuickComm.: No

Max: 6500.0

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

Min: -

Datatype: Float Unit:

Def:

P-Group: MOTOR

Max: -

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

Min: 0.000

CStat:

CUT

Datatype: Float Unit:

Def:

1.000

P-Group: MOTOR

Active: Immediately

QuickComm.: No

Max: 20.000

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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