Compound Braking - Siemens MICROMASTER 440 Operating Instructions Manual

Issue 10/06
2
OFF1/OFF3
OFF2
P1234
DC braking active
r0053
Bit00
DC braking start frequency (entered in Hz)
P1234 =...
Sets the start frequency for the DC brake.
6.4.18.5

Compound braking

Compound braking current (entered in %)
P1236 =...
Defines DC level superimposed on AC waveform after exceeding DC-link voltage threshold
of compound braking. The value is entered in [%] relative to rated motor current (P0305).
(see also 6.4.12").
If P1254 = 0 :
Compound braking switch-on level
otherwise :
Compound braking switch-on level
Without Compound braking
⏐f⏐
f_set
i
u
DC-link
MICROMASTER 440
Operating Instructions (Compact)
ON
⏐f⏐
OFF ramp
1
0
P1236 = 0
f_act
t
t
U
t
P0347
OFF2
DC braking
OFF2
P1233
=
U 1.13
DC_Comp
=
U 0.98
DC_Comp
P1236 > 0
With Compound braking
⏐f⏐
f_set
f_act
i
u
DC-link
DC_Comp
6 Commissioning
t t
t t
t
t
650 Hz
0 %
⋅ ⋅ = ⋅ ⋅
2 V . 1 13 2 P0210
mains
⋅
r 1242
t
t
t
59