Siemens 440 User Manual
Page 152
Parameter Description
Issue 01/06
MICROMASTER 440 Parameter List
152
6SE6400-5BB00-0BP0
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.
P1245
t
0
1
V
DC
t
t
f
V
DC_min
P1257
Pulse
enabled
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.
P1245
t
0
1
V
DC
t
t
f
V
DC_min
P1257
OFF1
OFF2
Pulse
enabled
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
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)
Level
3