Dc Braking - Siemens Sinamics S120 Function Manual

6.10.2

DC braking

Preconditions
● This function has been released for Motor Modules in the booksize, blocksize and
● An induction motor must be used.
With the function "DC braking", after a demagnetization time, a DC current is injected in the
stator windings of the induction motor. The DC current brakes the motor.
6.10.2.1 Activation via parameters
Setting
DC braking is set with parameter p1231 = 4.
● Setting the braking current for DC braking with p1232[0..n]
● Setting the braking current duration for DC braking with p1233[0..n]
● Setting the start speed for DC braking with p1234[0..n]
Activation
The function is activated if the signal source of p1230 is set to "1". Initially, for the motor
demagnetization time p0347[0 ... n], the pulses are inhibited until the motor is demagnetized.
The DC braking start speed parameter p1234 is not taken into account with this activation.
The DC braking current p1232[0 ... n] is injected into the motor as long as a "1" signal is
available at the input of p1230. The motor can be braked down to standstill.
If the drive is switched off – and DC braking is activated – the drive switches itself on. DC
current is then injected into the stator windings.
Drive functions
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
chassis formats.
6.10 Armature short-circuit braking, DC braking
Basic functions
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