Siemens SINAMICS G120XA - DC Braking Initiated by a Control Command; DC Braking When the Motor Is Switched off; Settings for DC Braking; Configuring DC Braking as a Response to Faults

DC braking initiated by a control command
'&EUDNLQJ
VHOHFWHG
'&EUDNLQJ
DFWLYH
2))
Q
S
W
W
W
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
'&EUDNLQJ
DFWLYH
'&EUDNLQJIRU
2))2))
2))
2))
6WDUWVSHHG
7LPH
LQWHUYDO
Q
S
W
W
W
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 6-64 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
6.6 Motor control
SINAMICS G120XA converter
298 Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB