Dc Braking Braking Current / Dcbrk I_Brake; Dc Braking Time / Dcbrk Time - Siemens SINAMICS G150 Manual

Re p1231 = 5:
DC braking can only be set for induction motors.
DC braking is activated if the OFF1 or OFF3 command is present. Binector input p1230 is ineffective. If the drive
speed still lies above the speed threshold p1234, then initially, the drive is ramped-down to this threshold,
demagnetized (see p0347) and is then switched into DC braking for the time set in p1233. After this, the drive is
switched-off. If, at OFF1/OFF3, the drive speed is below p1234, then it is immediately demagnetized and switched
into DC braking. A change is made into normal operation if the OFF1 command is withdrawn prematurely.
DC braking by means of fault response continues to be possible.
Re p1231 = 14:
DC braking can only be set for induction motors.
DC braking is initiated if binector input p1230 = 1 during operation and the actual speed is below the starting speed
p1234 (before this, the drive must have operated above p1234 plus the hysteresis). Then, following upstream de-
magnetization (see p0347), the braking current p1232 is injected for the time set in p1233. The drive then changes
into normal operation. During braking the command for DC braking can be withdrawn. If the time p1233 is exceeded,
then DC braking is inhibited and the drive changes into normal operation.
For OFF1 and OFF3, DC braking is only executed, if binector input p1230 = 1 signal.
DC braking by means of fault response continues to be possible.
For operation with an encoder, the encoder signal may not exceed a ripple of 15 rpm in the range of p1234.
Re p1231 = 3, 4, 5, 14:
The value can only be changed to values not equal to 3, 4, 5 or 14 if p0491 is not equal to 4 and p2101 is not equal
to 6 (armature short-circuit/DC braking not set).
Note:
ASC: Armature Short Circuit
CSM: Control Supply Module
DCBRK: DC Braking
IVP: Internal Voltage Protection
UPS: Uninterruptible Power Supply
p1232[0...n]

DC braking braking current / DCBRK I_brake

VECTOR_G Can be changed: U, T
Data type: FloatingPoint32
P-Group: Functions
Not for motor type: PEM, REL, FEM
Min
0.00 [Arms]
Description: Sets the braking current for DC braking.
Dependency: Refer to: p1230, p1231, p1233, p1234, r1239, p1345, p1346
Note: A change to the braking current becomes effective the next time that DC braking is switched on.
The value for p1232 is specified as an rms value in the 3-phase system. The magnitude of the braking current is the
same as that of an identical output current at frequency zero (see r0067, r0068, p0640). The braking current is
internally limited to r0067.
For the current controller, the settings of parameters p1345 and p1346 (I_max limiting controller) are used.
p1233[0...n]

DC braking time / DCBRK time

VECTOR_G Can be changed: U, T
Data type: FloatingPoint32
P-Group: Functions
Not for motor type: PEM, REL, FEM
Min
0.0 [s]
Description: Sets the DC braking time (as fault response).
Dependency: Refer to: p1230, p1231, p1232, p1234, r1239
Note: The time set is also effective when parameterizing DC braking as fault response.
If a speed encoder is being used, DC braking is ended as soon as the drive falls below the standstill threshold
(p1226).
SINAMICS G130/G150
List Manual (LH2), 04/2014, A5E03263479A
Calculated: CALC_MOD_ALL
Dyn. index: MDS, p0130
Units group: -
Scaling: -
Max
10000.00 [Arms]
Calculated: -
Dyn. index: MDS, p0130
Units group: -
Scaling: -
Max
3600.0 [s]
2 Parameters
2.2 List of parameters
Access level: 1
Func. diagram: 7017
Unit selection: -
Expert list: 1
Factory setting
0.00 [Arms]
Access level: 1
Func. diagram: 7017
Unit selection: -
Expert list: 1
Factory setting
1.0 [s]
329