Dc Braking; Bi: Enable Dc Braking - Siemens MICROMASTER 440 Parameter Manual

Issue 01/06
3.25

DC braking

P1230[3]

BI: Enable DC braking

CStat: CUT
P-Group: COMMANDS
Enables DC braking via a signal applied from an external source. Function remains active while external
input signal is active.
DC braking causes the motor to stop rapidly by applying a DC braking current (current applied also holds
shaft stationary).
When the DC braking signal is applied, the inverter output pulses are blocked and the DC current is not
applied until the motor has been sufficiently demagnetized.
BI: Enable DC brk.
1
P1230.C
(0:0) 0
 f

f*
i
DC braking active
1
r0053
Bit00
0
Note: DC brake can be applied in drive states r0002 = 1, 4, 5
The level of DC braking is set in P1232 (DC braking current - relative to the rated motor current) which is set
to 100 % by default.
Index:
P1230[0] : 1st. Command data set (CDS)
P1230[1] : 2nd. Command data set (CDS)
P1230[2] : 3rd. Command data set (CDS)
Common Settings:
722.0 = Digital input 1 (requires P0701 to be set to 99, BICO)
722.1 = Digital input 2 (requires P0702 to be set to 99, BICO)
722.2 = Digital input 3 (requires P0703 to be set to 99, BICO)
722.3 = Digital input 4 (requires P0704 to be set to 99, BICO)
722.4 = Digital input 5 (requires P0705 to be set to 99, BICO)
722.5 = Digital input 6 (requires P0706 to be set to 99, BICO)
722.6 = Digital input 7 (via analog input 1, requires P0707 to be set to 99)
722.7 = Digital input 8 (via analog input 2, requires P0708 to be set to 99)
Caution:
With the DC braking, the kinetic energy of the motor is converted into heat in the motor. The drive could
overheat if the remains in this status for an exessive period of time !
DC braking is not possible when using a synchronous motor (i.e. P0300 = 2).
Notice:
This delay time is set in P0347 (demagnetization time). If this delay is too short, overcurrent trips can occur.
MICROMASTER 440 Parameter List
6SE6400-5BB00-0BP0
Datatype: U32
Active: first confirm
DC braking
P0347
Parameter Description
Min: 0:0
Unit: - Def: 0:0
QuickComm.: No Max: 4000:0
f_set
f_act
Level
3
t
t
t
t
143