Siemens SINAMICS G120C Operating Instructions Manual page 329
Low voltage converters
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- Operating instructions manual (470 pages) ,
- Compact operating instructions (92 pages) ,
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Regardless of the configuration, you also can define the DC braking as a reaction to certain
converter faults.
Unexpected motor acceleration
In the following configurations, the converter can accelerate the motor to the set speed
without requiring a further ON command:
- DC braking initiated by a control command
- DC braking when falling below a starting speed
An unexpected acceleration of the motor can cause serious injury or material damage.
• Consider the behavior of the drive in the higher-level controller.
DC braking initiated by a control command
Figure 8-61
Set p1231 = 4 and p1230 = control command.
The control command "DC braking activation" activates and deactivates the DC braking:
• 1 signal:
The converter de-energizes the motor for the motor de-excitation time p0347 in order to
demagnetize the motor.
The converter activates the DC braking.
• 0 signal: The drive switches back to normal operation.
SINAMICS G120C Converters
Operating Instructions, 02/2023, FW V4.7 SP14, A5E34263257B AK
WARNING
Activating DC braking via a control command
Advanced commissioning
8.21 Electrically braking the motor
327
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