Siemens G130 List Manual page 351

The short circuit is activated if the DC link voltage exceeds 800 V. If the DC link voltage falls below 450 V, then the
short-circuit is withdrawn. This therefore ensures that the required input voltage for the Control Supply Module is
maintained.
For chassis units, the following applies:
The value for the voltage limits is calculated, depending on the voltage class, from EEPROM data of the particular
power unit and a factor.
For p1231 = 4:
The function is activated as soon as the activation criterion is fulfilled.
- the function can be superseded by OFF2
a) For synchronous motors (p0300 = 2xx, 4xx), the internal armature short-circuit is initiated.
- the Motor Module must support this function (r0192.9 = 1).
b) For induction motors (p0300 = 1xx), the DC braking is initiated.
Activation criterion (one of the following criteria is fulfilled):
- binector input p1230 = 1 signal (DC braking activation).
- the drive is not in the state "S4: Operation" or in "S5x" (refer to function diagram 2610).
- the internal pulse enable is missing (r0046.19 = 0).
For 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 A change is made into normal operation if the OFF1 command is withdrawn prematurely.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.
For 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 During braking the command for DC braking can be withdrawn.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.
For 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).
In order that the armature short-circuit/DC braking is active as fault response, the corresponding fault number must
be entered in p2100 and fault response p2101 set = 6 (encoder fault response, see p0491).
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: PMSM, SESM, REL
Min
0.00 [Arms]
Description: Sets the braking current for DC braking.
Dependency: Refer to: p1230, p1231, p1233, p1234, r1239, p1345, p1346
SINAMICS G130/G150
List Manual (LH2), 07/2016, A5E03263479A
Calculated: CALC_MOD_ALL
Dyn. index: MDS, p0130
Unit group: -
Scaling: -
Max
10000.00 [Arms]
2 Parameters
2.2 List of parameters
Access level: 1
Func. diagram: 7017
Unit selection: -
Expert list: 1
Factory setting
0.00 [Arms]
351