Setting The Vdc Controller - Siemens SINAMICS V20 Operating Instructions Manual

Commissioning via the built-in BOP
5.6 Function commissioning
Setting parameters
You only have to change the factory default settings of the Imax controller if the converter
tends to oscillate when it reaches the current limit or it is shut down due to overcurrent.
Parameter Function
P0305[0...2] Rated motor current [A]
P0640[0...2] Motor overload factor [%]
P1340[0...2] Imax controller propor-
tional gain
P1341[0...2] Imax controller integral
time [s]
P1345[0...2] Imax voltage controller
proportional gain
P1346[0...2] Imax voltage controller
integral time [s]
r0056.13 Status of motor control: Imax controller active
5.6.2.8

Setting the Vdc controller

Functionality
If ramp-down time is too short, the converter may display the alarm A911 which means the
DC link voltage is too high. The Vdc controller dynamically controls the DC link voltage to
prevent overvoltage trips on high inertia systems.
106
Setting
This parameter defines the nominal motor current from rating plate.
This parameter defines motor overload current limit relative to P0305 (rated
motor current).
This parameter defines the proportional gain of the Imax controller.
Range: 0.000 to 0.499 (factory default: 0.030)
This parameter defines the integral time constant of the Imax controller. Setting
P1341 to 0 disables the Imax controller.
Range: 0.000 to 50.000 (factory default: 0.300)
This parameter sets the proportional gain of Imax voltage controller. If the out-
put current (r0068) exceeds the maximum current (r0067), the converter is
dynamically controlled by reducing the output voltage.
Range: 0.000 to 5.499 (factory default: 0.250)
This parameter defines the integral time constant of the Imax voltage controller.
Range: 0.000 to 50.000 (factory default: 0.300)
SINAMICS V20 Converter
Operating Instructions, 10/2019, A5E34559884-012