Siemens SINAMICS G120 Operating Instructions Manual page 305
Low voltage converters
chassis devices with cu240b-2 and cu240e-2
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Also See for SINAMICS G120:
- List manual (1256 pages) ,
- Manual (732 pages) ,
- Operating instructions manual (550 pages)
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DC braking when a fault occurs
DC braking initiated by a control command
DC braking when the motor is switched off
Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2017, FW V4.7 SP6, A5E34259001B AD
Advanced commissioning
6.19 Electrically braking the motor
Requirement:
Fault number and fault response are assigned
via p2100 and p2101.
Function:
1. A fault occurs, which initiates DC braking as
response.
2. The motor brakes along the down ramp to
the speed for the start of DC braking.
3. DC braking starts.
Requirement:
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 inverter interrupts
DC braking and the motor accelerates to its
setpoint.
Requirement:
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.
305
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