Siemens SINAMICS V20 Operating Instructions Manual page 98

Commissioning via the built-in BOP
5.6 Function commissioning
Setting parameters
Parameter Function
P1230[0...2] BI: Enable DC braking
P1232[0...2] DC braking current [%]
P1233[0...2] Duration of DC braking [s]
P1234[0...2] DC braking start frequency [Hz] This parameter sets the start frequency for DC braking.
P0347[0...2] Demagnetization time [s]
Motor overheat
For DC current braking, the motor kinetic energy is converted into thermal energy in the
motor. If braking lasts too long, then the motor can overheat.
Note
The "DC braking" function is only practical for induction motors.
DC braking is not suitable to hold suspended loads.
While DC braking, there is no other way of influencing the converter speed using an external
control. When parameterizing and setting the converter, it should be tested using real loads
as far as possible.
96
Setting
This parameter enables DC braking via a signal applied from an external
source. The function remains active while external input signal is active.
Factory default: 0
This parameter defines level of DC current relative to rated motor current
(P0305).
Range: 0 to 250 (factory default: 100)
This parameter defines duration for which DC braking is active following
an OFF1 or OFF3 command.
Range: 0.00 to 250.00 (factory default: 0.00)
Range: 0.00 to 550.00 (factory default: 550.00)
This parameter changes time allowed after OFF2/fault condition, before
pulses can be re-enabled.
Range: 0.000 to 20.000 (factory default: 1.000)
WARNING
SINAMICS V20 Converter
Operating Instructions, 10/2019, A5E34559884-012