Siemens MICROMASTER 440 - Manual (Page 58)

6 Commissioning Issue 10/06
MICROMASTER 440
58 Operating Instructions (Compact)
6.4.18.4 DC brake
BI: Enabling the DC brake
This enables DC braking using a signal that was used from an external source. The
function remains active as long as the external input signal is active. DC braking causes
the motor to quickly stop by injecting a DC current
⏐f⏐
P0347
f*
i
t
t
t
1
0
f_act
DC braking
0
1
DC braking active
r0053
Bit00
t
f_set
(0:0)
P1230.C
BI: Enable DC brk.
Note: DC brake can be applied in drive states r0002 = 1, 4, 5
DC braking current (entered in %)
Defines level of DC current in [%] relative to rated motor current (P0305).
Duration of DC braking (entered in s)
Defines duration for which DC injection braking is to be active following an OFF1 or OFF3
command.
t
P1234
OFF1/OFF3
ON
t
t
⏐f⏐
P1233
1
tt
P0347
OFF2
DC braking
OFF2
0
1
DC braking active
r0053
Bit00
P1230 = ...
100 %
0 s
P1232 =...
P1233 =...