Parameter Description

Issue 01/06

P1256 = 1:

Maintain dclink voltage until mains is returned or drive is tripped undervoltage or pulses disabled when frequency falls below the limit in P1257.

VDC

P1245

VDC_min

t

f

 

P1257

t

 

Pulse

 

enabled1

t

0

P1256 = 2:

This option ramps down the frequency to stand still even when mains return. If mains return, then an OFF1 is active until P1257 limit then pulses disabled. If mains does not return, frequency brought down under the control of vdc-min controller until P1257 limit then pulses disabled or undervoltage has occurred.

VDC

P1245

VDC_min

t

f

P1257

Pulse enabled1

0

OFF1

OFF2

t

t

P1257[3]

Freq limit for kinetic buffering

 

Min:

0.00

 

CStat:

CUT

Datatype: Float

Unit: Hz

Def:

2.50

 

P-Group:

SETPOINT

Active: first confirm

QuickComm.: No

Max:

600.00

Level

3

Frequency which kinetic buffering (KIB) either hold speed or disable pulses depending on P1256.

Index:

P1257[0] : 1st. Drive data set (DDS)

P1257[1] : 2nd. Drive data set (DDS)

P1257[2] : 3rd. Drive data set (DDS)

152

MICROMASTER 440 Parameter List

6SE6400-5BB00-0BP0

Page 152
Image 152
Siemens 440 manual P12573 Freq limit for kinetic buffering, 152, Active first confirm QuickComm. No Max 600.00