DC braking initiated by a control command
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Precondition:
p1231 = 4 and p1230 = control command, e.g.
p1230 = 722.3 (control command via DI 3)
Function:
1. The higher-level control issues the
command for DC braking, e.g. using DI3:
p1230 = 722.3.
2. DC braking starts.
If the higher-level control withdraws the com‐
mand during DC braking, the converter inter‐
rupts DC braking and the motor accelerates to
its setpoint.
DC braking when the motor is switched off
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Precondition:
p1231 = 5 or p1230 = 1 and p1231 = 14
Function:
1. The higher-level control switches off the
motor (OFF1 or OFF3).
2. The motor brakes along the down ramp to
the speed for the start of DC braking.
3. DC braking starts.
Parameters
Settings for DC braking
Number
Name
Factory setting
p0347[M]
Motor de-excitation time
0 s
p1230[C]
BI: DC braking activation
0
p1231[M]
Configuring DC braking
0
p1232[M]
DC braking, braking current
0 Arms
p1233[M]
DC braking duration
1 s
p1234[M]
Speed at the start of DC braking
210000 rpm
r1239[8…13]
CO/BO: DC braking status word
-
Table 6-99
Configuring DC braking as a response to faults
Number
Name
Factory setting
p2100[0…19]
Changing the fault reaction, fault number
0
p2101[0…19]
Changing the fault reaction, reaction
0
Advanced commissioning
6.7 Motor control
SINAMICS G120X converter
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
401
