Siemens 440 User Manual

Page 59

Issue 01/06

Parameter Description

MICROMASTER 440 Parameter List
6SE6400-5BB00-0BP0

P0347[3] Demagnetization

time

Min: 0.000

CStat:

CUT

Datatype: Float Unit:

Def:

1.000

P-Group: MOTOR

Active: Immediately

QuickComm.: No

Max: 20.000

Defines the de-magnetization time for the connected induction motor.

The de-magnetization time is the time that must expire between powering-down the drive (OFF2 or a drive
inverter fault/error) and powering-up again. The drive inverter is prevented from being powered-up again
within this time interval. The flux in the induction motor is reduced to a low value during this de-
magnetization time.

OFF1

OFF2

active

P0347

inactive

OFF2

Motor coasts down

Index:

P0347[0] : 1st. Drive data set (DDS)
P0347[1] : 2nd. Drive data set (DDS)
P0347[2] : 3rd. Drive data set (DDS)

Note:

The de-magnetization time is approximately 250% of the rotor time constant (r0384) in seconds.

The pre-assignment (default value) depends on the drive inverter type and its rated/nominal values.

It is not active after a normal ramp-down - i.e. after OFF1 or OFF3.

If this time is excessively shortened, then the drive inverter will be tripped (shut down) due to an
overcurrent condition.

If a synchronous motor is connected, the de-magnetization time should be set to 0.

P0350[3]

Stator resistance (line-to-line)

Min: 0.00001

CStat:

CUT

Datatype: Float Unit:

Ohm

Def:

4.00000

P-Group: MOTOR

Active: Immediately

QuickComm.: No

Max: 2000.00000

Stator resistance value in [Ohms] for connected motor (from line-to-line). The parameter value includes the
cable resistance.

)

(

0350

Cable

⋅

There are three ways to determine the value for this parameter:
1. Calculate

using

P0340 = 1 (data entered from rating plate) or

P0010 = 1, P3900 = 1,2 or 3 (end of quick commissioning).

2. Measure using P1910 = 1 (motor data identification - value for stator resistance is overwritten).
3. Measure manually using an Ohmmeter.

Index:

P0350[0] : 1st. Drive data set (DDS)
P0350[1] : 2nd. Drive data set (DDS)
P0350[2] : 3rd. Drive data set (DDS)

Note:

Since measured line-to-line, this value may appear to be higher (up to 2 times higher) than expected.

The value entered in P0350 (stator resistance) is the one obtained by the method last used.

Default value is depending on inverter type and its rating data.

Level