Siemens SINAMICS V20 Operating Instructions Manual page 248

Parameter list
8.2 Parameter list
Parameter Function
P1217 Holding time after
ramp down [s]
Defines time for which inverter runs at minimum frequency (P1080) after ramping down.
Note: If P1217 > P1227, P1227 will take precedence.
P1218[0...2] BI: Motor holding
brake override
Enables the motor holding brake output to be overridden, allowing the brake to be opened under separate
control.
P1227[0...2] Zero speed detection
monitoring time [s]
Sets the monitoring time for the standstill identification.
When braking with OFF1 or OFF3, standstill is identified after this time has expired, after the setpoint speed
has fallen below P2167. After this, the braking signal is started, the system waits for the closing time and
then the pulses are cancelled.
Note: P1227 = 300.0: function is deactivated
P1227 = 0.0: pulses are locked immediately
If P1217 > P1227, P1227 will take precedence.
P1230[0...2] BI: Enable DC braking 0 -
Enables DC braking via a signal applied from an external source. Function remains active while external
input signal is active. DC braking causes the motor to stop rapidly by applying a DC braking current (current
applied also holds shaft stationary).
When the DC braking signal is applied, the inverter output pulses are blocked and the DC current is not
applied until the motor has been sufficiently demagnetized. This delay time is set in P0347 (demagnetiza-
tion time). If this delay is too short, overcurrent trips can occur. The level of DC braking is set in P1232 (DC
braking current - relative to the rated motor current) which is set to 100 % by default.
Caution: With the DC braking, the kinetic energy of the motor is converted into heat in the motor. The inverter could
overheat if it remains in this status for an excessive period of time!
P1232[0...2] DC braking current
[%]
Defines level of DC current relative to rated motor current (P0305). The DC braking can be issued observ-
ing the following dependencies:
OFF1 / OFF3 ==> see P1233
•
BICO ==> see P1230
•
P1233[0...2] Duration of DC brak-
ing [s]
Defines duration for which DC braking is active following an OFF1 or OFF3 command.
When an OFF1 or OFF3 command is received by the inverter, the output frequency starts to ramp to 0 Hz.
When the output frequency reaches the value set in P1234, the inverter injects a DC braking current P1232
for the time duration set in P1233.
Caution: See P1230
Notice: The DC braking function causes the motor to stop rapidly by applying a DC braking current.
When the DC braking signal is applied, the inverter output pulses are blocked and the DC current not ap-
plied until the motor has been sufficiently demagnetized (demagnetization time is calculated automatically
from motor data).
Note: P1233 = 0 means that DC braking is not activated.
248
Range Factory
default
0.0 - 20.0 1.0
0 - 0
4294967295
0.0 - 300.0 4.0
0
4294967295
0 - 250 100
0.00 - 250.00 0.00
Can be Scaling
changed
C, T -
U, T -
U, T -
U, T -
U, T -
U, T -
Operating Instructions, 11/2016, A5E34559884-006
Data Data Acc.
set type Level
- Float 2
CDS U32 3
DDS Float 2
CDS U32 3
DDS U16 2
DDS Float 2
SINAMICS V20 Inverter