Siemens SINAMICS G120 Operating Instructions Manual page 211

DC braking parameters
Table 9- 37
Parameter
p1230
p1231
Table 9- 38
Parameter
p2100
p2101 = 6
The fault is assigned an index of p2100. The associated fault response must be assigned the same
index in p2101.
In the List Manual of the inverter - in the "Faults and alarms" list - possible fault responses are listed
for every fault. The entry "DCBRAKE" means that for this particular fault, DC braking can be set as
fault response.
Table 9- 39
Parameter
p1232
p1233
p1234
p0347
SINAMICS G120C frequency converter
Operating Instructions, 03/2012, FW V4.5, A5E02999804B AB
Parameters for configuring DC braking
Description
Activate DC braking (BICO parameter)
The value for this parameter (0 or 1) can be either entered directly or specified by
means of an interconnection with a control command.
Configure DC braking
p1231 = 0, no DC braking

p1231 = 4, general enabling of DC braking

p1231 = 5, DC braking for OFF1/3, independent of p1230

P1231 = 14, enables DC braking for the case that the motor speed falls below the

start speed for DC braking.
Parameters for configuring DC braking in the event of faults
Description
Set fault number for fault reaction (factory setting: 0)
Enter the fault number for which DC braking should be activated, e.g.: p2100[3] = 7860
(external fault 1).
Fault reaction setting (factory setting: 0)
Assigning the fault response: p2101[3] = 6.
Additional parameters for setting DC braking
Description
DC braking braking current (factory setting: 0 A)
Setting the braking current for the DC braking.
DC braking duration (factory setting: 1 s)
DC braking start speed (factory setting: 210000 rpm)
DC braking starts – assuming that it has been correspondingly parameterized
(p1230/p1231) – as soon as the actual speed falls below this threshold.
Motor de-excitation
The parameter is calculated via p0340 = 1, 3.
The inverter can trip due to an overcurrent during DC braking if the de-excitation time is
too short.
9.9 Application-specific functions
Functions
209