Siemens 440 P03473 Demagnetization time, P03503 Stator resistance line-to-line, Min 00001 CStat

Issue 01/06 Parameter Description

P0347[3] Demagnetization time				Min:	0.000
CStat:	CUT	Datatype: Float	Unit: s	Def:	1.000
P-Group:	MOTOR	Active: Immediately	QuickComm.: No	Max:	20.000

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

Level

3

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.

ON
OFF1	t
OFF2
inactive
active	t
f	OFF2
	Motor coasts down
	t
	P0347

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

Level

2

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

P0350 = 2 ⋅ (RCable + RS )

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.

MICROMASTER 440	Parameter List
6SE6400-5BB00-0BP0	59