Siemens MICROMASTER 420 - Page 24

6 Commissioning Issue 04/04
MICROMASTER 420
24 Compact Operating Manual
6.2.15.3 Holding brake
P1215 =...
Holding brake enable
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 ").
0t
fmin
(P1080)
P1217
P1216
1
r0052
Bit12
t
f
Point 2Point 1
P1216 =...
Holding brake release delay (entered in s)
Defines the time interval during which the frequency inverter runs with the min. frequency
P1080 after magnetizing, before the ramp-up starts.
P1217 =...
Holding time after ramp-down (entered in s)
Defines time for which inverter runs at minimum frequency (P1080) after ramping down.
6.2.15.4 DC braking
P1232 =...
DC braking current (entered in %)
Defines level of DC current in [%] relative to rated motor current (P0305).
P1233 =...
Duration of DC braking (entered in s)
Defines duration for which DC injection braking is to be active following an OFF1 or OFF3
command.
6.2.15.5 Compound braking
P1236 =...
Compound braking current (entered in %)
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).
Compound braking switch-on level
P0210213.1V21.13 U mains
DC_Comp
⋅⋅=⋅⋅=
If P1254 = 0 :
1242r0.98 U
DC_Comp
⋅=
Compound braking switch-on level
otherwise :
6.2.15.6 Vdc controller
P1240 =...
Configuration of Vdc controller
Enables / disables Vdc controller.
0 Vdc controller disabled
1 Vdc-max controller enabled
P1254 =...
Auto detect Vdc switch-on levels
Enables/disables auto-detection of switch-on
levels for Vdc control functionalities.
0 Disabled
1 Enabled
t
t
f
1
-controller active
V
DC_max
t
V
DC
0
r0056 Bit14
r1242
A0911
f
f
act
set
1.0 s
1.0 s
0
100 %
0 s
0 %
1
1