Operating instructions

04/02 1 Parameters
MICROMASTER 420 Parameter List
6SE6400-5BA00-0BP0
69
P1230 BI: Enable DC braking
Min: 0:0
CStat: CUT Datatype: U32 Unit: - Def: 0:0
P-Group: COMMANDS Active: first confirm QuickComm. No Max: 4000:0
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.
DC braking
ON/OFF1
 f 
P0347
f*
f_act
i
t
t
t
t
1
0
P1230
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.
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 (via analog input, requires P0704 to be set to 99)
Caution:
Frequent use of long periods of DC braking can cause the motor to overheat.
Notice:
This delay time is set in P0347 (demagnetization time). If this delay is too short, overcurrent trips can occur.
DC braking is not possible when using a synchronous motor (i.e. P0300 = 2).
P1232 DC braking current Min: 0
CStat: CUT Datatype: U16 Unit: % Def: 100
P-Group: FUNC Active: Immediately QuickComm. No Max: 250
Defines level of DC current in [%] relative to rated motor current (P0305).
Level:
3
Level:
2