Siemens MICROMASTER 420 Operating Manual page 24

6 Commissioning
6.2.15.3 Holding brake
Holding brake enable
P1215 =...
Enables/disables holding brake
function (MHB).
0 Motor holding brake disabled
1 Motor holding brake enabled
NOTE
The following must apply when
controlling the brake relay via a
digital output: P0731 = 14 (refer to
Section 6.2.4 "Digital ").
Holding brake release delay (entered in s)
P1216 =...
Defines the time interval during which the frequency inverter runs with the min. frequency
P1080 after magnetizing, before the ramp-up starts.
Holding time after ramp-down (entered in s)
P1217 =...
Defines time for which inverter runs at minimum frequency (P1080) after ramping down.
6.2.15.4 DC braking
DC braking current (entered in %)
P1232 =...
Defines level of DC current in [%] relative to rated motor current (P0305).
Duration of DC braking (entered in s)
P1233 =...
Defines duration for which DC injection braking is to be active following an OFF1 or OFF3
command.
6.2.15.5 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 6.2.15.6).
If P1254 = 0 :
Compound braking switch-on level
otherwise :
Compound braking switch-on level
6.2.15.6 Vdc controller
Configuration of Vdc controller
P1240 =...
Enables / disables Vdc controller.
0 Vdc controller disabled
1 Vdc-max controller enabled
Auto detect Vdc switch-on levels
P1254 =...
Enables/disables auto-detection of switch-on
levels for Vdc control functionalities.
0 Disabled
1 Enabled
24
0
f
fmin
(P1080)
P1216
r0052
Point 1
Bit12
1
0
U
DC_Comp
U
DC_Comp
1
r1242
1
V
-controller active
DC_max
r0056 Bit14
Issue 04/04
P1217
Point 2
= ⋅ ⋅ = ⋅
1.13 2 V . 1 13
mains
= ⋅
0.98 r 1242
V
DC
A0911
1
0
f
f
act
f
set
MICROMASTER 420
Compact Operating Manual
t
t
1.0 s
1.0 s
100 %
0 s
0 %
⋅
2 P0210
t
t
t