Siemens 440 P13403 Imax freq. controller prop. gain, P13413 Imax freq. ctrl. integral time, 164

Parameter Description Issue 01/06

3.29.1.3Imax controller

P1340[3] Imax freq. controller prop. gain				Min:	0.000
CStat:	CUT	Datatype: Float	Unit: -	Def:	0.000
P-Group:	CONTROL	Active: Immediately	QuickComm.: No	Max:	0.499

Proportional gain of the I_max frequency controller.

Level

3

The Imax controller reduces inverter current if the output current exceeds the maximum motor current (r0067).

In linear V/f, parabolic V/f, FCC, and programmable V/f modes the I_max controller uses both a frequency controller (see parameters P1340 and P1341) and a voltage controller (see parameters P1345 and P1346). The frequency controller seeks to reduce current by limiting the inverter output frequency (to a minimum of the two times nominal slip frequency). If this action does not successfully remove the overcurrent condition, the inverter output voltage is reduced using the I_max voltage controller. When the overcurrent condition has been removed successfully, frequency limiting is removed using the ramp-up time set in P1120.

Motor current r0067

Imax -controller active	t
	A0501
r0056 Bit13 1
0	t

f

t

In linear V/f for textiles, FCC for textiles, or external V/f modes only the I_max voltage controller is used to reduce current (See parameters P1345 and P1346).

Index:

P1340[0] : 1st. Drive data set (DDS)

P1340[1] : 2nd. Drive data set (DDS)

P1340[2] : 3rd. Drive data set (DDS)

Note:

The I_max controller can be disabled by setting the frequency controller integral time P1341 to zero. This disables both the frequency and voltage controllers. Note that when disabled, the I_max controller will take no action to reduce current but overcurrent warnings will still be generated, and the Drive will trip in excessive overcurrent or overload conditions.

P1341[3] Imax freq. ctrl. integral time					Min:	0.000	Level
	CStat:	CUT	Datatype: Float	Unit: s	Def:	0.300	3
	P-Group:	CONTROL	Active: Immediately	QuickComm.: No	Max:	50.000

Integral time constant of the I_max controller.

P1341 = 0 :

I_max frequency and voltage controllers disabled

P1340 = 0 and P1341 > 0 :

frequency controller enhanced integral

P1340 > 0 and P1341 > 0 : frequency controller normal PI control

See description in parameter P1340 for further information.

Index:

P1341[0] : 1st. Drive data set (DDS)

P1341[1] : 2nd. Drive data set (DDS)

P1341[2] : 3rd. Drive data set (DDS)

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