Siemens 440 manual P13123 Starting boost, R1315 CO Total boost voltage, 158

Parameter Description Issue 01/06

P1312[3] Starting boost				Min:	0.0
CStat:	CUT	Datatype: Float	Unit: %	Def:	0.0
P-Group:	CONTROL	Active: Immediately	QuickComm.: No	Max:	250.0

Level

2

Applies a constant linear offset (in [%] relative to P0305 (rated motor current)) to active V/f curve (either linear or quadratic) after an ON command and is active until

1)ramp output reaches setpoint for the first time respectively

2)setpoint is reduced to less than present ramp output

This is useful for starting loads with high inertia.

Setting the starting boost (P1312) too high will cause the inverter to limit the current, which will in turn restrict the output frequency to below the setpoint frequency.

V	Boost voltage									Validity range
Vmax
Vn										ON
(P0304)	actual VBoost						e			OFF
							g
						ta				 
						l
					o
			v							f
		t
		u					f
		p
VStartBoost,100	t						/
	u					V			)
	O					l
					a			0
			m				=
		r				0
		o
		N			0
				3						P1312 active
			1
		(P
VStartBoost,50
										1
										0
0	fBoost,end									f
									fn	fmax
	(P1316)								(P0310)	(P1082)

t

t

t

where voltage values are given

VStartBoost,100 = P0305⋅ P0350⋅ P1312

100

=VStartBoost,100

VStartBoost,502

Index:

P1312[0] : 1st. Drive data set (DDS)

P1312[1] : 2nd. Drive data set (DDS)

P1312[2] : 3rd. Drive data set (DDS)

Example:

Setpoint = 50Hz. Ramping up with starting boost. During ramp up, setpoint changed to 20Hz. As soon as setpoint changed, starting boost removed because setpoint smaller than present ramp output.

Dependency:

Acceleration boost P1312 has no effect during vector operation.

Note:

See parameter P1310

r1315	CO: Total boost voltage		Min:	-
	Datatype: Float	Unit: V	Def:	-
	P-Group: CONTROL		Max:	-

Displays total value of voltage boost (in volts).

Level

4

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